/* binarise a volume between a range */
Volume *binarise(Volume * vol, double floor, double ceil, double fg, double bg)
{
int x, y, z;
int sizes[MAX_VAR_DIMS];
double value;
progress_struct progress;
if(verbose){
fprintf(stdout, "Binarising, range: [%g:%g] fg/bg: [%g:%g]\n", floor, ceil, fg, bg);
}
get_volume_sizes(*vol, sizes);
initialize_progress_report(&progress, FALSE, sizes[2], "Binarise");
for(z = sizes[0]; z--;){
for(y = sizes[1]; y--;){
for(x = sizes[2]; x--;){
value = get_volume_voxel_value(*vol, z, y, x, 0, 0);
if((value >= floor) && (value <= ceil)){
set_volume_voxel_value(*vol, z, y, x, 0, 0, fg);
}
else {
set_volume_voxel_value(*vol, z, y, x, 0, 0, bg);
}
}
}
update_progress_report(&progress, z + 1);
}
terminate_progress_report(&progress);
return (vol);
}
image_metadata * read_minc(char *filename, float **image, int *sizes){
VIO_Volume volume;
VIO_Real dummy[3];
image_metadata *meta;
if( input_volume(filename, 3, NULL, NC_UNSPECIFIED, FALSE, 0.0, 0.0, TRUE, &volume, (minc_input_options *) NULL ) != VIO_OK )
return( NULL );
meta = (image_metadata *)calloc( 1 , sizeof(image_metadata) ) ;
meta->start = calloc(3,sizeof(float));
meta->step = calloc(3,sizeof(float));
meta->length = calloc(3,sizeof(int));
get_volume_sizes(volume,sizes);
*image=malloc(sizes[0]*sizes[1]*sizes[2]*sizeof(**image));
set_volume(*image, volume, sizes);
meta->length[0]=sizes[0];
meta->length[1]=sizes[1];
meta->length[2]=sizes[2];
get_volume_starts(volume,dummy);
meta->start[0]=dummy[0];
meta->start[1]=dummy[1];
meta->start[2]=dummy[2];
get_volume_separations(volume,dummy);
meta->step[0]=dummy[0];
meta->step[1]=dummy[1];
meta->step[2]=dummy[2];
delete_volume(volume);
return meta;
}
/* clamp a volume between a range */
Volume *clamp(Volume * vol, double floor, double ceil, double bg)
{
int x, y, z;
int sizes[MAX_VAR_DIMS];
double value;
progress_struct progress;
if(verbose){
fprintf(stdout, "Clamping, range: [%g:%g] bg: %g\n", floor, ceil, bg);
}
get_volume_sizes(*vol, sizes);
initialize_progress_report(&progress, FALSE, sizes[2], "Clamping");
for(z = sizes[0]; z--;){
for(y = sizes[1]; y--;){
for(x = sizes[2]; x--;){
value = get_volume_voxel_value(*vol, z, y, x, 0, 0);
if((value < floor) || (value > ceil)){
set_volume_voxel_value(*vol, z, y, x, 0, 0, bg);
}
}
}
update_progress_report(&progress, z + 1);
}
terminate_progress_report(&progress);
return (vol);
}
void scale_volume(VIO_Volume * vol, double o_min, double o_max, double min, double max)
{
double value, a, b;
int sizes[MAX_VAR_DIMS];
int i, j, k, v;
VIO_progress_struct progress;
get_volume_sizes(*vol, sizes);
/* rescale the volume */
a = (max - min) / (o_max - o_min);
b = min - (o_min * a);
initialize_progress_report(&progress, FALSE, sizes[Z_IDX], "Rescaling Volume");
for(k = sizes[Z_IDX]; k--;){
for(j = sizes[Y_IDX]; j--;){
for(i = sizes[X_IDX]; i--;){
for(v = sizes[V_IDX]; v--;){
value = (get_volume_real_value(*vol, k, j, i, v, 0) * a) + b;
set_volume_real_value(*vol, k, j, i, v, 0, value);
}
}
}
update_progress_report(&progress, k + 1);
}
terminate_progress_report(&progress);
if(verbose){
fprintf(stdout, " + rescaled data range: [%g:%g]\n", min, max);
}
set_volume_real_range(*vol, min, max);
}
int write_volume(char *name, VIO_Volume vol, float *data){
int i,j,k,index,sizes[5];
float min=FLT_MAX,max=FLT_MIN;
fprintf(stderr,"Writing %s\n",name);
get_volume_sizes(vol,sizes);
for (i=0;i<sizes[0];i++){
for (j=0;j<sizes[1];j++){
for (k=0;k<sizes[2];k++){
index=i*sizes[2]*sizes[1] + j*sizes[2] + k;
min=MIN(min,data[index]);
max=MAX(max,data[index]);
}
}
}
set_volume_real_range(vol,min,max);
get_volume(data, vol, sizes);
output_volume( name, NC_FLOAT,FALSE,min,max,vol,NULL, (minc_output_options *)NULL);
return STATUS_OK;
}
/* Build the target lattice by transforming the source points through the
current non-linear transformation stored in:
Glinear_transform and Gsuper_d{x,y,z} deformation volumes
both input (px,py,pz) and output (tx,ty,tz) coordinate lists are in
WORLD COORDINATES
*/
void build_target_lattice_using_super_sampled_def(
float px[], float py[], float pz[],
float tx[], float ty[], float tz[],
int len, int dim)
{
int
i,j,
sizes[VIO_MAX_DIMENSIONS],
xyzv[VIO_MAX_DIMENSIONS];
VIO_Real
def_vector[VIO_N_DIMENSIONS],
voxel[VIO_MAX_DIMENSIONS],
x,y,z;
long
index[VIO_MAX_DIMENSIONS];
get_volume_sizes(Gsuper_sampled_vol,sizes);
get_volume_XYZV_indices(Gsuper_sampled_vol,xyzv);
for(i=1; i<=len; i++) {
/* apply linear part of the transformation */
general_transform_point(Glinear_transform,
(VIO_Real)px[i], (VIO_Real)py[i], (VIO_Real)pz[i],
&x, &y, &z);
/* now get the non-linear part, using
nearest neighbour interpolation in
the super-sampled deformation
volume. */
convert_world_to_voxel(Gsuper_sampled_vol,
x,y,z, voxel);
if ((voxel[ xyzv[VIO_X] ] >= -0.5) && (voxel[ xyzv[VIO_X] ] < sizes[xyzv[VIO_X]]-0.5) &&
(voxel[ xyzv[VIO_Y] ] >= -0.5) && (voxel[ xyzv[VIO_Y] ] < sizes[xyzv[VIO_Y]]-0.5) &&
(voxel[ xyzv[VIO_Z] ] >= -0.5) && (voxel[ xyzv[VIO_Z] ] < sizes[xyzv[VIO_Z]]-0.5) ) {
for(j=0; j<3; j++) index[ xyzv[j] ] = (long) (voxel[ xyzv[j] ]+0.5);
for(index[xyzv[VIO_Z+1]]=0; index[xyzv[VIO_Z+1]]<sizes[xyzv[VIO_Z+1]]; index[xyzv[VIO_Z+1]]++)
GET_VALUE_4D(def_vector[ index[ xyzv[VIO_Z+1] ] ], \
Gsuper_sampled_vol, \
index[0], index[1], index[2], index[3]);
x += def_vector[VIO_X];
y += def_vector[VIO_Y];
z += def_vector[VIO_Z];
}
tx[i] = (float)x;
ty[i] = (float)y;
tz[i] = (float)z;
}
}
VIO_BOOL vol_cog(VIO_Volume d1, VIO_Volume m1, float *centroid)
{
VIO_Real
sx,sy,sz,si,
true_value,
tx,ty,tz;
int
i,j,k,
count[VIO_MAX_DIMENSIONS];
sx = 0.0; /* init centroid vars */
sy = 0.0;
sz = 0.0;
si = 0.0;
get_volume_sizes(d1, count);
/* loop over all voxels */
for(i=0; i<count[0]; i++)
for(j=0; j<count[1]; j++)
for(k=0; k<count[2]; k++) {
convert_3D_voxel_to_world(d1, i,j,k, &tx, &ty, &tz);
if (point_not_masked(m1, tx, ty, tz)) {
GET_VALUE_3D( true_value, d1, i,j,k);
sx += tx * true_value;
sy += ty * true_value;
sz += tz * true_value;
si += true_value;
}
}
/* calc centroids */
if (si!=0.0) {
centroid[0] = sx/ si;
centroid[1] = sy/ si;
centroid[2] = sz/ si;
return(TRUE);
}
else {
return(FALSE);
}
}
/* perform an erosion on a volume */
Volume *erosion_kernel(Kernel * K, Volume * vol)
{
int x, y, z, c;
double value;
int sizes[MAX_VAR_DIMS];
progress_struct progress;
Volume tmp_vol;
if(verbose){
fprintf(stdout, "Erosion kernel\n");
}
get_volume_sizes(*vol, sizes);
initialize_progress_report(&progress, FALSE, sizes[2], "Erosion");
/* copy the volume */
tmp_vol = copy_volume(*vol);
for(z = -K->pre_pad[2]; z < sizes[0] - K->post_pad[2]; z++){
for(y = -K->pre_pad[1]; y < sizes[1] - K->post_pad[1]; y++){
for(x = -K->pre_pad[0]; x < sizes[2] - K->post_pad[0]; x++){
value = get_volume_real_value(tmp_vol, z, y, x, 0, 0);
for(c = 0; c < K->nelems; c++){
if(get_volume_real_value(*vol,
z + K->K[c][2],
y + K->K[c][1],
x + K->K[c][0],
0 + K->K[c][3], 0 + K->K[c][4]) > value){
set_volume_real_value(*vol,
z + K->K[c][2],
y + K->K[c][1],
x + K->K[c][0],
0 + K->K[c][3],
0 + K->K[c][4], value * K->K[c][5]);
}
}
value = get_volume_real_value(tmp_vol, z, y, x, 0, 0);
}
}
update_progress_report(&progress, z + 1);
}
delete_volume(tmp_vol);
terminate_progress_report(&progress);
return (vol);
}
/* pad a volume using the background value */
Volume *pad(Kernel * K, Volume * vol, double bg)
{
int x, y, z;
int sizes[MAX_VAR_DIMS];
get_volume_sizes(*vol, sizes);
/* z */
for(y = 0; y < sizes[1]; y++){
for(x = 0; x < sizes[2]; x++){
for(z = 0; z < -K->pre_pad[2]; z++){
set_volume_real_value(*vol, z, y, x, 0, 0, bg);
}
for(z = sizes[0] - K->post_pad[2]; z < sizes[0]; z++){
set_volume_real_value(*vol, z, y, x, 0, 0, bg);
}
}
}
/* y */
for(z = 0; z < sizes[0]; z++){
for(x = 0; x < sizes[2]; x++){
for(y = 0; y < -K->pre_pad[1]; y++){
set_volume_real_value(*vol, z, y, x, 0, 0, bg);
}
for(y = sizes[1] - K->post_pad[1]; y < sizes[1]; y++){
set_volume_real_value(*vol, z, y, x, 0, 0, bg);
}
}
}
/* x */
for(z = 0; z < sizes[0]; z++){
for(y = 0; y < sizes[1]; y++){
for(x = 0; x < -K->pre_pad[0]; x++){
set_volume_real_value(*vol, z, y, x, 0, 0, bg);
}
for(x = sizes[2] - K->post_pad[0]; x < sizes[2]; x++){
set_volume_real_value(*vol, z, y, x, 0, 0, bg);
}
}
}
return (vol);
}
void calc_volume_range(VIO_Volume * vol, double *min, double *max)
{
int x, y, z;
int sizes[MAX_VAR_DIMS];
double value;
VIO_progress_struct progress;
*min = DBL_MAX;
*max = -DBL_MIN;
get_volume_sizes(*vol, sizes);
initialize_progress_report(&progress, FALSE, sizes[2], "Finding Range");
for(z = sizes[0]; z--;){
for(y = sizes[1]; y--;){
for(x = sizes[2]; x--;){
value = get_volume_voxel_value(*vol, z, y, x, 0, 0);
if(value < *min){
*min = value;
}
else if(value > *max){
*max = value;
}
}
}
update_progress_report(&progress, z + 1);
}
terminate_progress_report(&progress);
if (*min == *max) {
*max = *min + 1.0;
}
if(verbose){
fprintf(stdout, "Found range of [%g:%g]\n", *min, *max);
}
}
VIO_BOOL vol_to_cov(VIO_Volume d1, VIO_Volume m1, float centroid[4], float covar[4][4], double *step)
{
VectorR
vector_step,
slice_step,
row_step,
col_step;
PointR
starting_offset,
starting_origin,
starting_position,
slice,
row,
col,
voxel;
VIO_Real
tx,ty,tz;
int
i,r,c,s,
limits[VOL_NDIMS];
float
t,
sxx,syy,szz,
sxy,syz,sxz,
sx,sy,sz,si;
VIO_Real
thickness[3];
int
sizes[3];
VIO_Real
true_value;
get_volume_separations(d1, thickness);
get_volume_sizes(d1, sizes);
/* build sampling lattice info */
for(i=0; i<3; i++) {
step[i] *= thickness[i] / fabs( thickness[i]);
}
fill_Vector( col_step, step[COL_IND], 0.0, 0.0 );
fill_Vector( row_step, 0.0, step[ROW_IND], 0.0 );
fill_Vector( slice_step, 0.0, 0.0, step[SLICE_IND] );
convert_3D_voxel_to_world(d1, 0.0, 0.0, 0.0, &tx, &ty, &tz);
fill_Point( starting_origin, tx, ty, tz);
for(i=0; i<3; i++) { /* for each dim, get # of steps in that direction,
and set starting offset */
t = sizes[i] * thickness[i] / step[i];
limits[i] = abs( t );
Point_coord( starting_offset, (i) ) =
( (sizes[i]-1)*thickness[i] - (limits[i] * step[i] ) ) / 2.0;
}
ADD_POINTS( starting_position, starting_origin, starting_offset ); /* */
/* calculate centroids first */
sx = 0.0;
sy = 0.0;
sz = 0.0;
si = 0.0;
for(s=0; s<=limits[SLICE_IND]; s++) {
SCALE_VECTOR( vector_step, slice_step, s);
ADD_POINT_VECTOR( slice, starting_position, vector_step );
for(r=0; r<=limits[ROW_IND]; r++) {
SCALE_VECTOR( vector_step, row_step, r);
ADD_POINT_VECTOR( row, slice, vector_step );
SCALE_POINT( col, row, 1.0); /* init first col position */
for(c=0; c<=limits[COL_IND]; c++) {
convert_3D_world_to_voxel(d1, Point_x(col), Point_y(col), Point_z(col), &tx, &ty, &tz);
fill_Point( voxel, tx, ty, tz ); /* build the voxel POINT */
if (point_not_masked(m1, Point_x(col), Point_y(col), Point_z(col))) {
if (INTERPOLATE_TRUE_VALUE( d1, &voxel, &true_value )) {
sx += Point_x(col) * true_value;
sy += Point_y(col) * true_value;
sz += Point_z(col) * true_value;
si += true_value;
}
/* else requested voxel is just outside volume., so ignore it */
}
ADD_POINT_VECTOR( col, col, col_step );
}
}
}
if (si!=0.0) {
centroid[1] = sx/ si;
centroid[2] = sy/ si;
centroid[3] = sz/ si;
sxx = syy = szz = 0.0;
sxy = syz = sxz = 0.0;
/* now calculate variances and co-variances */
for(s=0; s<=limits[VIO_Z]; s++) {
SCALE_VECTOR( vector_step, slice_step, s);
ADD_POINT_VECTOR( slice, starting_position, vector_step );
for(r=0; r<=limits[VIO_Y]; r++) {
SCALE_VECTOR( vector_step, row_step, r);
ADD_POINT_VECTOR( row, slice, vector_step );
SCALE_POINT( col, row, 1.0); /* init first col position */
for(c=0; c<=limits[VIO_X]; c++) {
convert_3D_world_to_voxel(d1, Point_x(col), Point_y(col), Point_z(col), &tx, &ty, &tz);
fill_Point( voxel, tx, ty, tz ); /* build the voxel POINT */
if (point_not_masked(m1, Point_x(col), Point_y(col), Point_z(col))) {
if (INTERPOLATE_TRUE_VALUE( d1, &voxel, &true_value )) {
sxx += (Point_x( col )-centroid[1]) * (Point_x( col )-centroid[1]) * true_value;
syy += (Point_y( col )-centroid[2]) * (Point_y( col )-centroid[2]) * true_value;
szz += (Point_z( col )-centroid[3]) * (Point_z( col )-centroid[3]) * true_value;
sxy += (Point_x( col )-centroid[1]) * (Point_y( col )-centroid[2]) * true_value;
syz += (Point_y( col )-centroid[2]) * (Point_z( col )-centroid[3]) * true_value;
sxz += (Point_x( col )-centroid[1]) * (Point_z( col )-centroid[3]) * true_value;
}
/* else requested voxel is just outside volume., so ignore it */
}
ADD_POINT_VECTOR( col, col, col_step );
}
}
}
covar[1][1] = sxx/si; covar[1][2] = sxy/si; covar[1][3] = sxz/si;
covar[2][1] = sxy/si; covar[2][2] = syy/si; covar[2][3] = syz/si;
covar[3][1] = sxz/si; covar[3][2] = syz/si; covar[3][3] = szz/si;
return(TRUE);
}
else {
return(FALSE);
}
}
void normalize_data_to_match_target(VIO_Volume d1, VIO_Volume m1, VIO_Real thresh1,
VIO_Volume d2, VIO_Volume m2, VIO_Real thresh2,
Arg_Data *globals)
{
VectorR
vector_step;
PointR
starting_position,
slice,
row,
col,
pos2,
voxel;
double
tx,ty,tz;
int
i,j,k,
r,c,s;
VIO_Real
min_range, max_range,
data_vox, data_val,
value1, value2;
VIO_Real
t1,t2, /* temporary threshold values */
s1,s2,s3; /* to store the sums for f1,f2,f3 */
float
*ratios,
result; /* the result */
int
sizes[VIO_MAX_DIMENSIONS],ratios_size,count1,count2;
VIO_Volume
vol;
VIO_progress_struct
progress;
VIO_Data_types
data_type;
set_feature_value_threshold(d1,d2,
&thresh1, &thresh2,
&t1, &t2);
if (globals->flags.debug) {
print ("In normalize_data_to_match_target, thresh = %10.3f %10.3f\n",t1,t2) ;
}
ratios_size = globals->count[ROW_IND] * globals->count[COL_IND] * globals->count[SLICE_IND];
ALLOC(ratios, ratios_size);
fill_Point( starting_position, globals->start[VIO_X], globals->start[VIO_Y], globals->start[VIO_Z]);
s1 = s2 = s3 = 0.0;
count1 = count2 = 0;
for(s=0; s<=globals->count[SLICE_IND]; s++) {
SCALE_VECTOR( vector_step, globals->directions[SLICE_IND], s);
ADD_POINT_VECTOR( slice, starting_position, vector_step );
for(r=0; r<=globals->count[ROW_IND]; r++) {
SCALE_VECTOR( vector_step, globals->directions[ROW_IND], r);
ADD_POINT_VECTOR( row, slice, vector_step );
SCALE_POINT( col, row, 1.0); /* init first col position */
for(c=0; c<=globals->count[COL_IND]; c++) {
convert_3D_world_to_voxel(d1, Point_x(col), Point_y(col), Point_z(col), &tx, &ty, &tz);
fill_Point( voxel, tx, ty, tz ); /* build the voxel POINT */
if (point_not_masked(m1, Point_x(col), Point_y(col), Point_z(col))) {
value1 = get_value_of_point_in_volume( Point_x(col), Point_y(col), Point_z(col), d1);
if ( value1 > t1 ) {
count1++;
DO_TRANSFORM(pos2, globals->trans_info.transformation, col);
convert_3D_world_to_voxel(d2, Point_x(pos2), Point_y(pos2), Point_z(pos2), &tx, &ty, &tz);
fill_Point( voxel, tx, ty, tz ); /* build the voxel POINT */
if (point_not_masked(m2, Point_x(pos2), Point_y(pos2), Point_z(pos2))) {
value2 = get_value_of_point_in_volume( Point_x(pos2), Point_y(pos2), Point_z(pos2), d2);
if ( (value2 > t2) &&
((value2 < -1e-15) || (value2 > 1e-15)) ) {
ratios[count2++] = value1 / value2 ;
s1 += value1*value2;
s2 += value1*value1;
s3 += value2*value2;
} /* if voxel in d2 */
} /* if point in mask volume two */
} /* if voxel in d1 */
} /* if point in mask volume one */
ADD_POINT_VECTOR( col, col, globals->directions[COL_IND] );
} /* for c */
} /* for r */
} /* for s */
if (count2 > 0) {
if (globals->flags.debug) (void)print ("Starting qsort of ratios...");
qs_list (ratios,0,count2);
if (globals->flags.debug) (void)print ("Done.\n");
result = ratios[ (int)(count2/2) ]; /* the median value */
if (globals->flags.debug) (void)print ("Normalization: %7d %7d -> %10.8f\n",count1,count2,result);
if ( fabs(result) < 1e-15) {
print_error_and_line_num("Error computing normalization ratio `%f'.",__FILE__, __LINE__, result);
}
else {
data_type = get_volume_data_type(d1);
switch( data_type ) {
case SIGNED_BYTE:
case UNSIGNED_BYTE:
case SIGNED_SHORT:
case UNSIGNED_SHORT:
/* build temporary working volume */
vol = copy_volume_definition_no_alloc(d1, NC_UNSPECIFIED, FALSE, 0.0, 0.0);
get_volume_minimum_maximum_real_value(d1, &min_range, &max_range);
min_range /= result;
max_range /= result;
set_volume_real_range(vol, min_range, max_range);
get_volume_sizes(d1, sizes);
initialize_progress_report(&progress, FALSE, sizes[0]*sizes[1]*sizes[2] + 1,
"Normalizing source data" );
count1 = 0;
/* reset values in the data volume */
for(i=0; i<sizes[0]; i++)
for(j=0; j<sizes[1]; j++) {
count1++;
update_progress_report( &progress, count1);
for(k=0; k<sizes[2]; k++) {
GET_VOXEL_3D( data_vox, d1, i, j, k );
data_val = CONVERT_VOXEL_TO_VALUE(d1, data_vox);
data_val /= result;
data_vox = CONVERT_VALUE_TO_VOXEL( vol, data_val);
SET_VOXEL_3D( d1 , i, j, k, data_vox );
}
}
terminate_progress_report( &progress );
set_volume_real_range(d1, min_range, max_range);
if (globals->flags.debug) (void)print ("After normalization min,max, thresh = %f %f %f\n",
min_range, max_range, t1/result);
delete_volume(vol);
break;
default: /* then volume should be either float or double */
get_volume_sizes(d1, sizes);
initialize_progress_report(&progress, FALSE, sizes[0]*sizes[1]*sizes[2] + 1,
"Normalizing source data" );
count1 = 0;
/* nomalize the values in the data volume */
for(i=0; i<sizes[0]; i++)
for(j=0; j<sizes[1]; j++) {
count1++;
update_progress_report( &progress, count1);
for(k=0; k<sizes[2]; k++) { /* it should be possible to directly stream through the voxels, without indexing... */
GET_VOXEL_3D( data_vox, d1, i, j, k );
data_val = CONVERT_VOXEL_TO_VALUE(d1, data_vox);
data_val /= result;
data_vox = CONVERT_VALUE_TO_VOXEL( d1, data_val);
SET_VOXEL_3D( d1 , i, j, k, data_vox );
}
}
terminate_progress_report( &progress );
}
}
}
FREE(ratios);
}
void make_zscore_volume(VIO_Volume d1, VIO_Volume m1,
VIO_Real *threshold)
{
unsigned long
count;
int
stat_count,
sizes[VIO_MAX_DIMENSIONS],
s,r,c;
VIO_Real
wx,wy,wz,
valid_min_dvoxel, valid_max_dvoxel,
min,max,
sum, sum2, mean, var, std,
data_vox,data_val,
thick[VIO_MAX_DIMENSIONS];
PointR
voxel;
VIO_Volume
vol;
VIO_progress_struct
progress;
/* get default information from data and mask */
/* build temporary working volume */
vol = copy_volume_definition(d1, NC_UNSPECIFIED, FALSE, 0.0, 0.0);
set_volume_real_range(vol, MIN_ZRANGE, MAX_ZRANGE);
get_volume_sizes(d1, sizes);
get_volume_separations(d1, thick);
get_volume_voxel_range(d1, &valid_min_dvoxel, &valid_max_dvoxel);
/* initialize counters and sums */
count = 0;
sum = 0.0;
sum2 = 0.0;
min = 1e38;
max = -1e38;
stat_count = 0;
initialize_progress_report(&progress, FALSE, sizes[0]*sizes[1]*sizes[2] + 1,
"Tally stats" );
/* do first pass, to get mean and std */
for(s=0; s<sizes[0]; s++) {
for(r=0; r<sizes[1]; r++) {
for(c=0; c<sizes[2]; c++) {
stat_count++;
update_progress_report( &progress, stat_count);
convert_3D_voxel_to_world(d1, (VIO_Real)s, (VIO_Real)r, (VIO_Real)c, &wx, &wy, &wz);
if (m1 != NULL) {
convert_3D_world_to_voxel(m1, wx, wy, wz, &Point_x(voxel), &Point_y(voxel), &Point_z(voxel));
}
else {
wx = 0.0; wy = 0.0; wz = 0.0;
}
if (point_not_masked(m1, wx,wy,wz)) {
GET_VOXEL_3D( data_vox, d1 , s, r, c );
if (data_vox >= valid_min_dvoxel && data_vox <= valid_max_dvoxel) {
data_val = CONVERT_VOXEL_TO_VALUE(d1, data_vox);
if (data_val > *threshold) {
sum += data_val;
sum2 += data_val*data_val;
count++;
if (data_val < min)
min = data_val;
else
if (data_val > max)
max = data_val;
}
}
}
}
}
}
terminate_progress_report( &progress );
stat_count = 0;
initialize_progress_report(&progress, FALSE, sizes[0]*sizes[1]*sizes[2] + 1,
"Zscore convert" );
/* calc mean and std */
mean = sum / (float)count;
var = ((float)count*sum2 - sum*sum) / ((float)count*((float)count-1));
std = sqrt(var);
min = 1e38;
max = -1e38;
/* replace the voxel values */
for(s=0; s<sizes[0]; s++) {
for(r=0; r<sizes[1]; r++) {
for(c=0; c<sizes[2]; c++) {
stat_count++;
update_progress_report( &progress, stat_count);
GET_VOXEL_3D( data_vox, d1, s, r, c );
if (data_vox >= valid_min_dvoxel && data_vox <= valid_max_dvoxel) {
data_val = CONVERT_VOXEL_TO_VALUE(d1, data_vox);
if (data_val > *threshold) {
/* instead of
data_val = CONVERT_VALUE_TO_VOXEL(d1, data_vox);
i will use
data_val = CONVERT_VALUE_TO_VOXEL(d1, vol);
since the values in vol are changed with respect to the
new z-score volume */
data_val = (data_val - mean) / std;
if (data_val< MIN_ZRANGE) data_val = MIN_ZRANGE;
if (data_val> MAX_ZRANGE) data_val = MAX_ZRANGE;
data_vox = CONVERT_VALUE_TO_VOXEL( vol, data_val);
if (data_val < min) {
min = data_val;
}
else {
if (data_val > max)
max = data_val;
}
}
else
data_vox = -DBL_MAX; /* should be fill_value! */
SET_VOXEL_3D( d1 , s, r, c, data_vox );
}
}
}
}
terminate_progress_report( &progress );
set_volume_real_range(d1, MIN_ZRANGE, MAX_ZRANGE); /* reset the data volume's range */
*threshold = (*threshold - mean) / std;
delete_volume(vol);
}
int main(int argc, char *argv[])
{
int
count,
i,j,k, p,r,s, flag,
sizes1[3],sizes2[3], sizes3[3];
VIO_Real
thresh;
VIO_Real
mean1, std1, mean2, std2,
corr, v1, v2, v3, s1, s2, s12,
u,v,w, x,y,z;
VIO_Status status;
VIO_Volume
data1, data2, mask;
char *f1, *f2, *mf;
if (argc<4) {
print ("usage: xcorr_vol.c vol1.mnc vol2.mnc threshold [mask.mnc]\n");
exit(EXIT_FAILURE);
}
prog_name = argv[0];
f1 = argv[1];
f2 = argv[2];
thresh = atof(argv[3]);
if (argc==5)
mf = argv[4];
status = input_volume(f1, 3, default_dim_names, NC_UNSPECIFIED, FALSE, 0.0,0.0,
TRUE, &data1, (minc_input_options *)NULL);
if (status!=VIO_OK) {
print ("Error reading %s.\n",f1);
exit(EXIT_FAILURE);
}
status = input_volume(f2, 3, default_dim_names, NC_UNSPECIFIED, FALSE, 0.0,0.0,
TRUE, &data2, (minc_input_options *)NULL);
if (status!=VIO_OK) {
print ("Error reading %s.\n",f2);
exit(EXIT_FAILURE);
}
if (argc==5) {
status = input_volume(mf, 3, default_dim_names, NC_UNSPECIFIED, FALSE, 0.0,0.0,
TRUE, &mask, (minc_input_options *)NULL);
if (status!=VIO_OK) {
print ("Error reading %s.\n",mf);
exit(EXIT_FAILURE);
}
get_volume_sizes(mask,sizes3);
}
else
mask = (VIO_Volume)NULL;
get_volume_sizes(data1,sizes1);
get_volume_sizes(data2,sizes2);
if (sizes1[0] != sizes2[0] || sizes1[1] != sizes2[1] || sizes1[2] != sizes2[2]) {
print ("Size mismatch between %s and %s.\n",f1,f2);
print ("%d,%d,%d != %d,%d,%d\n",
sizes1[0],sizes1[1],sizes1[2],
sizes2[0],sizes2[1],sizes2[2]);
exit(EXIT_FAILURE);
}
get_zscore_values(data1, mask, thresh, &mean1, &std1);
get_zscore_values(data2, mask, thresh, &mean2, &std2);
if (std1==0.0 || std2==0.0) {
print ("No standard deviation in one of %s and %s.\n",f1,f2);
exit(EXIT_FAILURE);
}
count = 0;
s1 = s2 = s12 = 0.0;
for(i=0; i<sizes1[0]; i++) {
for(j=0; j<sizes1[1]; j++) {
for(k=0; k<sizes1[2]; k++) {
flag = TRUE;
if (mask != NULL) {
convert_3D_voxel_to_world(data1, i,j,k, &x, &y, &z);
convert_3D_world_to_voxel(mask, x,y,z, &u, &v, &w);
p = VIO_ROUND(u);
r = VIO_ROUND(v);
s = VIO_ROUND(w);
if (p>=0 && p<sizes3[0] &&
r>=0 && r<sizes3[1] &&
s>=0 && s<sizes3[2]) {
GET_VALUE_3D( v3 , mask, p, r, s);
if (v3 < 0.5)
flag = FALSE;
}
else
flag = FALSE;
}
if (flag ) {
GET_VALUE_3D( v1 , data1, i, j, k);
GET_VALUE_3D( v2 , data2, i, j, k);
v1 = (v1 - mean1) / std1;
v2 = (v2 - mean2) / std2;
v1 = v1 - v2;
s12 += fabs(v1);
count++;
}
}
}
}
if (count==0) {
exit(EXIT_FAILURE);
print ("No masked voxels\n");
}
else {
corr = s12 / count;
print ("%15.12f\n",corr);
exit(EXIT_SUCCESS);
}
}
void get_zscore_values(VIO_Volume d1, VIO_Volume m1,
VIO_Real threshold, VIO_Real *mean, VIO_Real *std)
{
unsigned long
count;
int
sizes[VIO_MAX_DIMENSIONS],
s,r,c;
VIO_Real
wx,wy,wz,
valid_min_dvoxel, valid_max_dvoxel,
min,max,
sum, sum2, var,
data_vox,data_val,
thick[VIO_MAX_DIMENSIONS];
/* get default information from data and mask */
get_volume_sizes(d1, sizes);
get_volume_separations(d1, thick);
get_volume_voxel_range(d1, &valid_min_dvoxel, &valid_max_dvoxel);
/* initialize counters and sums */
count = 0;
sum = 0.0;
sum2 = 0.0;
min = FLT_MAX;
max = -FLT_MAX;
/* get mean and std */
for(s=0; s<sizes[0]; s++) {
for(r=0; r<sizes[1]; r++) {
for(c=0; c<sizes[2]; c++) {
convert_3D_voxel_to_world(d1, (VIO_Real)s, (VIO_Real)r, (VIO_Real)c, &wx, &wy, &wz);
if (point_not_masked(m1, wx,wy,wz)) {
GET_VOXEL_3D( data_vox, d1 , s, r, c );
if (data_vox >= valid_min_dvoxel && data_vox <= valid_max_dvoxel) {
data_val = CONVERT_VOXEL_TO_VALUE(d1, data_vox);
if (data_val > threshold) {
sum += data_val;
sum2 += data_val*data_val;
count++;
if (data_val < min)
min = data_val;
else
if (data_val > max)
max = data_val;
}
}
}
}
}
}
/* calc mean and std */
*mean = sum / (float)count;
var = ((float)count*sum2 - sum*sum) / ((float)count*((float)count-1));
*std = sqrt(var);
}
/* regrid a point in a file using the input co-ordinate and data */
void regrid_point(VIO_Volume * totals, VIO_Volume * weights,
double x, double y, double z, int v_size, double *data_buf)
{
int sizes[MAX_VAR_DIMS];
VIO_Real steps[MAX_VAR_DIMS];
VIO_Real starts[MAX_VAR_DIMS];
int start_idx[3];
int stop_idx[3];
double value, weight;
double euc_dist;
double euc[3];
double c_pos[3];
int i, j, k, v;
double coord[3]; /* target point in mm coordinates, in X, Y, Z order */
VIO_Transform dircos, invdircos;
VIO_Vector vector;
VIO_Real dir[3];
/* the coord used below has to be in mm coordinates in the dircos space of the
target volume. Hence the manipulations with the vols direction_cosines */
make_identity_transform(&dircos);
get_volume_direction_cosine(*totals, perm[0], dir);
fill_Vector(vector, dir[0], dir[1], dir[2]);
set_transform_x_axis(&dircos, &vector);
get_volume_direction_cosine(*totals, perm[1], dir);
fill_Vector(vector, dir[0], dir[1], dir[2]);
set_transform_y_axis(&dircos, &vector);
get_volume_direction_cosine(*totals, perm[2], dir);
fill_Vector(vector, dir[0], dir[1], dir[2]);
set_transform_z_axis(&dircos, &vector);
for(i = 0; i < 4; i++){
for(j = 0; j < 4; j++){
Transform_elem(invdircos, i, j) = Transform_elem(dircos, j, i);
}
}
transform_point(&invdircos, x, y, z, &coord[0], &coord[1], &coord[2]);
get_volume_sizes(*totals, sizes); /* in volume voxel order, ie z,y,x with x fastest */
get_volume_separations(*totals, steps);
get_volume_starts(*totals, starts);
/* figure out the neighbouring voxels start and stop (in voxel co-ordinates) */
for(i = 0; i < 3; i++){ /* go through x, y and z */
start_idx[i] =
(int)rint((coord[i] - starts[perm[i]] - regrid_radius[i]) / steps[perm[i]]);
stop_idx[i] = start_idx[i] + rint((regrid_radius[i] * 2) / steps[perm[i]]);
/* flip if required */
if(start_idx[i] > stop_idx[i]){
value = start_idx[i];
start_idx[i] = stop_idx[i];
stop_idx[i] = value;
}
/* check that we aren't off the edge */
if(start_idx[i] < 0){
start_idx[i] = 0;
}
if(stop_idx[i] >= sizes[perm[i]]){
stop_idx[i] = sizes[perm[i]] - 1;
}
}
/* loop over the neighbours, getting euclidian distance */
c_pos[0] = starts[perm[0]] + (start_idx[0] * steps[perm[0]]);
for(i = start_idx[0]; i <= stop_idx[0]; i++){
euc[0] = fabs(c_pos[0] - coord[0]);
c_pos[1] = starts[perm[1]] + (start_idx[1] * steps[perm[1]]);
for(j = start_idx[1]; j <= stop_idx[1]; j++){
euc[1] = fabs(c_pos[1] - coord[1]);
c_pos[2] = starts[perm[2]] + (start_idx[2] * steps[perm[2]]);
for(k = start_idx[2]; k <= stop_idx[2]; k++){
euc[2] = fabs(c_pos[2] - coord[2]);
euc_dist = sqrt(SQR2(euc[0]) + SQR2(euc[1]) + SQR2(euc[2]));
if((regrid_radius[0] == 0 || euc[0] <= regrid_radius[0]) &&
(regrid_radius[1] == 0 || euc[1] <= regrid_radius[1]) &&
(regrid_radius[2] == 0 || euc[2] <= regrid_radius[2])){
/* calculate the weighting factor */
switch (regrid_type){
default:
fprintf(stderr, "Erk! unknown regrid_type. File: %s Line: %d\n",
__FILE__, __LINE__);
exit(EXIT_FAILURE);
break;
case NEAREST_FUNC:
case LINEAR_FUNC:
weight = euc_dist;
break;
case KAISERBESSEL_FUNC:
weight =
gsl_sf_bessel_I0(regrid_sigma[0] *
sqrt(1 - SQR2(euc[0] / regrid_radius[0]))) *
gsl_sf_bessel_I0(regrid_sigma[1] *
sqrt(1 - SQR2(euc[1] / regrid_radius[1]))) *
gsl_sf_bessel_I0(regrid_sigma[2] *
sqrt(1 - SQR2(euc[2] / regrid_radius[2]))) /
SQR3((regrid_radius[0] + regrid_radius[1] + regrid_radius[2]) / 3);
break;
case GAUSSIAN_FUNC:
weight = exp(-SQR2(euc[0]) / SQR2(regrid_sigma[0])) *
exp(-SQR2(euc[1]) / SQR2(regrid_sigma[1])) *
exp(-SQR2(euc[2]) / SQR2(regrid_sigma[2]));
break;
}
/* set data values */
if(regrid_type == NEAREST_FUNC){
value = get_volume_real_value(*weights, k, j, i, 0, 0);
if(weight < value){
set_volume_real_value(*weights, k, j, i, 0, 0, weight);
for(v = 0; v < v_size; v++){
set_volume_real_value(*totals, k, j, i, v, 0,
data_buf[0 + v] * weight);
}
}
}
else{
for(v = 0; v < v_size; v++){
value = get_volume_real_value(*totals, k, j, i, v, 0);
set_volume_real_value(*totals, k, j, i, v, 0,
value + (data_buf[0 + v] * weight));
}
/* increment count value */
value = get_volume_real_value(*weights, k, j, i, 0, 0);
set_volume_real_value(*weights, k, j, i, 0, 0, value + weight);
}
}
c_pos[2] += steps[perm[2]];
}
c_pos[1] += steps[perm[1]];
}
c_pos[0] += steps[perm[0]];
}
}
float go_get_samples_with_offset(
VIO_Volume data, /* The volume of data */
VIO_Volume mask, /* The target mask */
float *x, float *y, float *z, /* the positions of the sub-lattice */
VIO_Real dx, VIO_Real dy, VIO_Real dz, /* the local displacement to apply */
int obj_func, /* the type of obj function req'd */
int len, /* number of sub-lattice nodes */
int *sample_target_count, /* number of nonmasked sub-lattice nodes */
float normalization, /* normalization factor for obj func*/
float *a1, /* feature value for (x,y,z) nodes */
VIO_BOOL *m1, /* mask flag for (x,y,z) nodes in source */
VIO_BOOL use_nearest_neighbour) /* interpolation flag */
{
double
sample, r,
s1,s2,s3,s4,s5,tmp; /* accumulators for inner loop */
int
sizes[3],
ind0, ind1, ind2,
offset0, offset1, offset2,
c,number_of_nonzero_samples;
int xs,ys,zs;
float
f_trans, f_scale;
static double v0, v1, v2;
static double f0, f1, f2, r0, r1, r2, r1r2, r1f2, f1r2, f1f2;
static double v000, v001, v010, v011, v100, v101, v110, v111;
double ***double_ptr;
double mean_s = 0.0; /* init variables for stats */
double mean_t = 0.0;
double var_s = 0.0;
double var_t = 0.0;
double covariance = 0.0;
number_of_nonzero_samples = 0;
get_volume_sizes(data, sizes);
xs = sizes[0];
ys = sizes[1];
zs = sizes[2];
s1 = s2 = s3 = s4 = s5 = 0.0;
++a1;
++m1; /* inc pointer, so that we are pointing to
the first feature value, corresponding
to the first sub-lattice point x,y,z */
if (use_nearest_neighbour) {
/* then do fast NN interpolation */
dx += 0.; /* to achieve `rounding' for ind0, ind1 and */
dy += 0.; /* ind2 below */
dz += 0.;
double_ptr = VOXEL_DATA (data);
/* increment by one as we index from 1...n (but the array is ALLOC'd from 0..n) */
x++;
y++;
z++;
/* for each sub-lattice node */
for(c=len; c--;) {
/*
* this is code to test timing of David's evaluate_volume_in_world()
* interpolation code. While it is _VERY_ general, the eval_vol_in_world()'s
* NN interpolation is approximately 8-9 times slower than the bit of
* fast NN code below.
*
* VIO_Real sampleR, index[5], wx, wy, wz;
* index[0] = (VIO_Real) ( *x + dx );
* index[1] = (VIO_Real) ( *y + dy );
* index[2] = (VIO_Real) ( *z + dz );
* index[3] = index[4] = 0.0;
* convert_voxel_to_world(data, index, &wx, &wy, &wz );
* evaluate_volume_in_world(data, wx, wy, wz,
* 0, TRUE, 0.0, &sampleR,
* NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
* sample = (double)sampleR;
*/
if (!(*m1) && (voxel_point_not_masked(mask, (VIO_Real)*x, (VIO_Real)*y, (VIO_Real)*z)) && (!(obj_func==NONLIN_CHAMFER) || (*a1>0)) ) {
ind0 = (int) ( *x + dx );
ind1 = (int) ( *y + dy );
ind2 = (int) ( *z + dz );
if (ind0>=0 && ind0<xs &&
ind1>=0 && ind1<ys &&
ind2>=0 && ind2<zs) {
sample = (double)(double_ptr[ind0][ind1][ind2]);
}
else {
sample = 0.0;
}
#include "switch_obj_func.c" /* contains a case statement to do the sample-to-sample computations required for each possible non-lin objective function */
}
/* increment the coordinate, value and mask array pointers */
x++; /* x,y,z are the coords of the sublattice in the fixed (source) image */
y++;
z++;
a1++; /* a1 is from the fixed image */
m1++; /* m1 is rom the mask on the fixed image */
}
}
else { /* then do fast trilinear interpolation */
/* set up offsets */
offset0 = (Gglobals->count[VIO_Z] > 1) ? 1 : 0;
offset1 = (Gglobals->count[VIO_Y] > 1) ? 1 : 0;
offset2 = (Gglobals->count[VIO_X] > 1) ? 1 : 0;
double_ptr = VOXEL_DATA (data);
/* increment by one as we index from 1...n */
++x;
++y;
++z;
/* for each sub-lattice node */
for(c=len; c--;) {
/* fast tri-linear interplation */
if ( !(*m1) && (voxel_point_not_masked(mask, (VIO_Real)*x, (VIO_Real)*y, (VIO_Real)*z)) && (!(obj_func==NONLIN_CHAMFER) || (*a1>0)) ) {
v0 = (VIO_Real) ( *x + dx );
v1 = (VIO_Real) ( *y + dy );
v2 = (VIO_Real) ( *z + dz );
ind0 = (int)v0;
ind1 = (int)v1;
ind2 = (int)v2;
if (ind0>=0 && ind0<(xs-offset0) &&
ind1>=0 && ind1<(ys-offset1) &&
ind2>=0 && ind2<(zs-offset2)) {
/* get the data */
v000 = (VIO_Real)(double_ptr[ind0 ][ind1 ][ind2 ]);
v001 = (VIO_Real)(double_ptr[ind0 ][ind1 ][ind2+offset2]);
v010 = (VIO_Real)(double_ptr[ind0 ][ind1+offset1][ind2 ]);
v011 = (VIO_Real)(double_ptr[ind0 ][ind1+offset1][ind2+offset2]);
v100 = (VIO_Real)(double_ptr[ind0+offset0][ind1 ][ind2 ]);
v101 = (VIO_Real)(double_ptr[ind0+offset0][ind1 ][ind2+offset2]);
v110 = (VIO_Real)(double_ptr[ind0+offset0][ind1+offset1][ind2 ]);
v111 = (VIO_Real)(double_ptr[ind0+offset0][ind1+offset1][ind2+offset2]);
/* Get the fraction parts */
f0 = v0 - ind0;
f1 = v1 - ind1;
f2 = v2 - ind2;
r0 = 1.0 - f0;
r1 = 1.0 - f1;
r2 = 1.0 - f2;
/* Do the interpolation */
r1r2 = r1 * r2;
r1f2 = r1 * f2;
f1r2 = f1 * r2;
f1f2 = f1 * f2;
sample =
r0 * (r1r2 * v000 +
r1f2 * v001 +
f1r2 * v010 +
f1f2 * v011);
sample +=
f0 * (r1r2 * v100 +
r1f2 * v101 +
f1r2 * v110 +
f1f2 * v111);
sample = sample;
}
else {
sample = 0.0;
}
#include "switch_obj_func.c"
}
/* increment the coordinate, value and mask array pointers */
x++; /* x,y,z are the coords of the sublattice in the fixed (source) image */
y++;
z++;
a1++; /* a1 is from the fixed image */
m1++; /* m1 is rom the mask on the fixed image */
}
/* do the last bits of the similarity function
calculation here - normalizing each obj_func
where-ever possible: */
r = 0.0;
switch (obj_func) {
case NONLIN_XCORR: /* use standard normalized cross-correlation
where 0.0 < r < 1.0, where 1.0 is best*/
if ( normalization < 0.001 && s3 < 0.00001) {
r = 1.0;
}
else {
if ( normalization < 0.001 || s3 < 0.00001) {
r = 0.0;
}
else {
r = s1 / ((sqrt((double)s2))*(sqrt((double)s3)));
}
}
/* r = 1.0 - r; now, 0 is best */
break;
case NONLIN_DIFF: /* normalization stores the number of samples in
the sub-lattice
s1 stores the sum of the magnitude of
the differences*/
r = -s1 /number_of_nonzero_samples; /* r = average intensity difference ; with
-max(intensity range) < r < 0,
where 0 is best */
break;
case NONLIN_LABEL:
r = s1 /number_of_nonzero_samples; /* r = average label agreement,
s1 stores the number of similar labels
0 < r < 1.0
where 1.0 is best */
break;
case NONLIN_CHAMFER:
if (number_of_nonzero_samples>0) {
r = 1.0 - (s1 / (20.0*number_of_nonzero_samples));
/* r = 1- average distance / 20mm
0 < r < ~1.0
where 1.0 is best
and where 2.0cm is an arbitrary value to
norm the dist, corresponding to a guess
at the maximum average cortical variability
so the max(r) could be greater than
1.0, but when it is, shouldn't
chamfer have larger weight to drive
the fit? */
}
else
r = 2.0; /* this is simply a value > 1.5, used as a
flag to indicate that there were no
samples used for the chamfer */
break;
case NONLIN_CORRCOEFF:
{
/* Accumulators:
* s1 = sum of source image values
* s2 = sum of target image values
* s3 = sum of squared source image values
* s4 = sum of squared target image values
* s5 = sum of source*target values
*
* normalization = #values considered
*/
if (number_of_nonzero_samples>0) {
mean_s = s1 / number_of_nonzero_samples;
mean_t = s2 / number_of_nonzero_samples;
var_s = s3 / number_of_nonzero_samples - mean_s*mean_s;
var_t = s4 / number_of_nonzero_samples - mean_t*mean_t;
covariance = s5 / number_of_nonzero_samples - mean_s*mean_t;
}
else {
mean_s = 0.0;
mean_t = 0.0;
var_s = 0.0;
var_t = 0.0;
covariance = 0.0;
}
if ((var_s < 0.00001) || (var_t < 0.00001) ) {
r = 0.0;
}
else {
r = covariance / sqrt( var_s*var_t );
}
}
break;
case NONLIN_SQDIFF: /* normalization stores the number of samples
in the sub-lattice.
s1 stores the sum of the squared intensity
differences */
r = -s1 /number_of_nonzero_samples;
break;
default:
print_error_and_line_num("Objective function %d not supported in go_get_samples_with_offset",__FILE__, __LINE__,obj_func);
}
return(r);
}
}
void interpolate_deformation_slice(VIO_Volume volume,
VIO_Real wx,Real wy,Real wz,
VIO_Real def[])
{
VIO_Real
world[VIO_N_DIMENSIONS],
v00,v01,v02,v03,
v10,v11,v12,v13,
v20,v21,v22,v23,
v30,v31,v32,v33;
long
ind0, ind1, ind2;
VIO_Real
voxel[VIO_MAX_DIMENSIONS],
frac[VIO_MAX_DIMENSIONS];
int
i,
xyzv[VIO_MAX_DIMENSIONS],
sizes[VIO_MAX_DIMENSIONS];
double temp_result;
def[VIO_X] = def[VIO_Y] = def[VIO_Z] = 0.0;
world[VIO_X] = wx; world[VIO_Y] = wy; world[VIO_Z] = wz;
convert_world_to_voxel(volume, wx, wy, wz, voxel);
/* Check that the coordinate is inside the volume */
get_volume_sizes(volume, sizes);
get_volume_XYZV_indices(volume, xyzv);
if ((voxel[ xyzv[VIO_X] ] < 0) || (voxel[ xyzv[VIO_X] ] >=sizes[ xyzv[VIO_X]]) ||
(voxel[ xyzv[VIO_Y] ] < 0) || (voxel[ xyzv[VIO_Y] ] >=sizes[ xyzv[VIO_Y]]) ||
(voxel[ xyzv[VIO_Z] ] < 0) || (voxel[ xyzv[VIO_Z] ] >=sizes[ xyzv[VIO_Z]])) {
return ;
}
if (/*(sizes[ xyzv[VIO_Z] ] == 1) &&*/ xyzv[VIO_Z]==1) {
/* Get the whole and fractional part of the coordinate */
ind0 = FLOOR( voxel[ xyzv[VIO_Z] ] );
ind1 = FLOOR( voxel[ xyzv[VIO_Y] ] );
ind2 = FLOOR( voxel[ xyzv[VIO_X] ] );
frac[VIO_Y] = voxel[ xyzv[VIO_Y] ] - ind1;
frac[VIO_X] = voxel[ xyzv[VIO_X] ] - ind2;
if (sizes[xyzv[VIO_X]] < 4 || sizes[xyzv[VIO_Y]] < 4) {
def[VIO_X] = get_volume_real_value(volume, 0, ind0, ind1, ind2, 0);
def[VIO_Y] = get_volume_real_value(volume, 1, ind0, ind1, ind2, 0);
def[VIO_Z] = get_volume_real_value(volume, 2, ind0, ind1, ind2, 0);
return;
}
if (ind1==0)
frac[VIO_Y] -= 1.0;
else {
ind1--;
while ( ind1+3 >= sizes[xyzv[VIO_Y]] ) {
ind1--;
frac[VIO_Y] += 1.0;
}
}
if (ind2==0)
frac[VIO_X] -= 1.0;
else {
ind2--;
while ( ind2+3 >= sizes[xyzv[VIO_X]] ) {
ind2--;
frac[VIO_X] += 1.0;
}
}
for(i=0; i<3; i++) {
GET_VOXEL_4D(v00, volume, i, ind0, ind1, ind2);
GET_VOXEL_4D(v01, volume, i, ind0, ind1, ind2+1);
GET_VOXEL_4D(v02, volume, i, ind0, ind1, ind2+2);
GET_VOXEL_4D(v03, volume, i, ind0, ind1, ind2+3);
GET_VOXEL_4D(v10, volume, i, ind0, ind1+1, ind2);
GET_VOXEL_4D(v11, volume, i, ind0, ind1+1, ind2+1);
GET_VOXEL_4D(v12, volume, i, ind0, ind1+1, ind2+2);
GET_VOXEL_4D(v13, volume, i, ind0, ind1+1, ind2+3);
GET_VOXEL_4D(v20, volume, i, ind0, ind1+2, ind2);
GET_VOXEL_4D(v21, volume, i, ind0, ind1+2, ind2+1);
GET_VOXEL_4D(v22, volume, i, ind0, ind1+2, ind2+2);
GET_VOXEL_4D(v23, volume, i, ind0, ind1+2, ind2+3);
GET_VOXEL_4D(v30, volume, i, ind0, ind1+3, ind2);
GET_VOXEL_4D(v31, volume, i, ind0, ind1+3, ind2+1);
GET_VOXEL_4D(v32, volume, i, ind0, ind1+3, ind2+2);
GET_VOXEL_4D(v33, volume, i, ind0, ind1+3, ind2+3);
CUBIC_BIVAR(v00,v01,v02,v03, \
v10,v11,v12,v13, \
v20,v21,v22,v23, \
v30,v31,v32,v33, \
frac[VIO_Y],frac[VIO_X], temp_result);
def[i] = CONVERT_VOXEL_TO_VALUE(volume,temp_result);
}
}
else {
print ("\n\nxyzv[] = %d %d %d %d\n",xyzv[0],xyzv[1],xyzv[2],xyzv[3]);
print ("\n\nsizes[]= %d %d %d %d\n",sizes[0],sizes[1],sizes[2],sizes[3]);
print_error_and_line_num("error in slice_interpolate", __FILE__, __LINE__);
}
}
int main(int argc, char *argv[])
{
VIO_Volume
volume;
VIO_Real
variability,
rand_val,
voxel[VIO_MAX_DIMENSIONS];
int
progress_count,
sizes[VIO_MAX_DIMENSIONS],
index[VIO_MAX_DIMENSIONS],
i,j,k;
VIO_progress_struct
progress;
union
{
long l;
char c[4];
} seedval;
time_t t;
char tmp;
prog_name = argv[0];
/* Check arguments */
if (argc != 4) {
(void) fprintf(stderr, "Usage: %s input.mnc output.mnc std_dev\n",
argv[0]);
exit(EXIT_FAILURE);
}
if( input_volume( argv[1], 3, NULL, NC_UNSPECIFIED, FALSE,
0.0, 0.0, TRUE, &volume, (minc_input_options *)NULL ) != OK ) {
(void)fprintf(stderr, "Error opening input volume file %s.\n",
argv[1]);
exit(EXIT_FAILURE);
}
variability = atof( argv[3] );
/* initialize drand function */
t = 2*time(NULL);
seedval.l = t;
tmp = seedval.c[0]; seedval.c[0] = seedval.c[3]; seedval.c[3] = tmp;
tmp = seedval.c[1]; seedval.c[1] = seedval.c[2]; seedval.c[2] = tmp;
srand48(seedval.l);
set_volume_real_range(volume, -5.0*variability, 5.0*variability);
get_volume_sizes(volume,sizes);
initialize_progress_report(&progress, FALSE,
sizes[VIO_X]*sizes[VIO_Y]*sizes[VIO_Z]+1,
"Randomizing volume");
progress_count = 0;
for(i=0; i<MAX_DIMENSIONS; i++) index[i] = 0;
/* loop over all voxels */
for(index[X]=0; index[X]<sizes[X]; index[X]++)
for(index[Y]=0; index[Y]<sizes[Y]; index[Y]++)
for(index[Z]=0; index[Z]<sizes[Z]; index[Z]++) {
/* get a random value from a gaussian distribution */
rand_val = variability * gaussian_random_0_1();
if (rand_val > 5.0*variability) rand_val = 5.0*variability;
if (rand_val < -5.0*variability) rand_val = -5.0*variability;
set_volume_real_value(volume,
index[0],index[1],index[2],index[3],index[4],
rand_val);
progress_count++;
update_progress_report(&progress, progress_count);
}
terminate_progress_report(&progress);
/* Write out the random volume */
if (output_volume(argv[2], NC_UNSPECIFIED, FALSE, 0.0, 0.0, volume,
(char *)NULL, (minc_output_options *)NULL) != OK) {
(void) fprintf(stderr, "%s: Error writing volume file %s\n",
argv[0], argv[2]);
exit(EXIT_FAILURE);
}
exit(EXIT_SUCCESS);
}
int main(int argc, char *argv[])
{
VIO_General_transform
transform,
*grid_transform_ptr,
forward_transform;
VIO_Volume
target_vol,
volume;
volume_input_struct
input_info;
VIO_Real
voxel[VIO_MAX_DIMENSIONS],
steps[VIO_MAX_DIMENSIONS],
start[VIO_N_DIMENSIONS],
target_steps[VIO_MAX_DIMENSIONS],
wx,wy,wz, inv_x, inv_y, inv_z,
def_values[VIO_MAX_DIMENSIONS];
static int
clobber_flag = FALSE,
verbose = TRUE,
debug = FALSE;
static char
*target_file;
int
parse_flag,
prog_count,
sizes[VIO_MAX_DIMENSIONS],
target_sizes[VIO_MAX_DIMENSIONS],
xyzv[VIO_MAX_DIMENSIONS],
target_xyzv[VIO_MAX_DIMENSIONS],
index[VIO_MAX_DIMENSIONS],
i,
trans_count;
VIO_progress_struct
progress;
static ArgvInfo argTable[] = {
{"-like", ARGV_STRING, (char *) 0, (char *) &target_file,
"Specify target volume sampling information."},
{"-no_clobber", ARGV_CONSTANT, (char *) FALSE, (char *) &clobber_flag,
"Do not overwrite output file (default)."},
{"-clobber", ARGV_CONSTANT, (char *) TRUE, (char *) &clobber_flag,
"Overwrite output file."},
{"-verbose", ARGV_CONSTANT, (char *) TRUE, (char *) &verbose,
"Write messages indicating progress (default)"},
{"-quiet", ARGV_CONSTANT, (char *) FALSE, (char *) &verbose,
"Do not write log messages"},
{"-debug", ARGV_CONSTANT, (char *) TRUE, (char *) &debug,
"Print out debug info."},
{NULL, ARGV_END, NULL, NULL, NULL}
};
prog_name = argv[0];
target_file = malloc(1024);
strcpy(target_file,"");
/* Call ParseArgv to interpret all command line args (returns TRUE if error) */
parse_flag = ParseArgv(&argc, argv, argTable, 0);
/* Check remaining arguments */
if (parse_flag || argc != 3) print_usage_and_exit(prog_name);
/* Read in file that has a def field to invert */
if (input_transform_file(argv[1], &transform) != OK) {
(void) fprintf(stderr, "%s: Error reading transform file %s\n",
argv[0], argv[1]);
exit(EXIT_FAILURE);
}
for(trans_count=0; trans_count<get_n_concated_transforms(&transform); trans_count++ ) {
grid_transform_ptr = get_nth_general_transform(&transform, trans_count );
if (grid_transform_ptr->type == GRID_TRANSFORM) {
copy_general_transform(grid_transform_ptr,
&forward_transform);
/*
this is the call that should be made
with the latest version of internal_libvolume_io
invert_general_transform(&forward_transform); */
forward_transform.inverse_flag = !(forward_transform.inverse_flag);
volume = grid_transform_ptr->displacement_volume;
if (strlen(target_file)!=0) {
if (debug) print ("Def field will be resampled like %s\n",target_file);
if (!file_exists( target_file ) ) {
(void) fprintf(stderr, "%s: Target file '%s' does not exist\n",
prog_name,target_file);
exit(EXIT_FAILURE);
}
start_volume_input(target_file, 3, (char **)NULL,
NC_UNSPECIFIED, FALSE, 0.0, 0.0,
TRUE, &target_vol,
(minc_input_options *)NULL,
&input_info);
get_volume_XYZV_indices(volume, xyzv);
get_volume_separations (volume, steps);
get_volume_sizes (volume, sizes);
get_volume_XYZV_indices(target_vol, target_xyzv);
get_volume_separations (target_vol, target_steps);
get_volume_sizes (target_vol, target_sizes);
for(i=0; i<VIO_MAX_DIMENSIONS; i++) {
index[i] = 0;
voxel[i] = 0.0;
}
convert_voxel_to_world(target_vol, voxel, &start[VIO_X], &start[VIO_Y], &start[VIO_Z]);
if( volume != (void *) NULL ){
free_volume_data( volume );
}
for(i=VIO_X; i<=VIO_Z; i++) {
steps[ xyzv[i] ] = target_steps[ target_xyzv[i] ] ;
sizes[ xyzv[i] ] = target_sizes[ target_xyzv[i] ] ;
}
set_volume_separations(volume, steps);
set_volume_sizes( volume, sizes);
set_volume_starts(volume, start);
alloc_volume_data( volume );
}
get_volume_sizes(volume, sizes);
get_volume_XYZV_indices(volume,xyzv);
for(i=0; i<VIO_MAX_DIMENSIONS; i++){
index[i] = 0;
}
if (verbose){
initialize_progress_report(&progress, FALSE,
sizes[xyzv[VIO_X]]*sizes[xyzv[VIO_Y]]*sizes[xyzv[VIO_Z]]+1,
"Inverting def field");
}
prog_count = 0;
for(index[xyzv[VIO_X]]=0; index[xyzv[VIO_X]]<sizes[xyzv[VIO_X]]; index[xyzv[VIO_X]]++)
for(index[xyzv[VIO_Y]]=0; index[xyzv[VIO_Y]]<sizes[xyzv[VIO_Y]]; index[xyzv[VIO_Y]]++)
for(index[xyzv[VIO_Z]]=0; index[xyzv[VIO_Z]]<sizes[xyzv[VIO_Z]]; index[xyzv[VIO_Z]]++) {
index[ xyzv[VIO_Z+1] ] = 0;
for(i=0; i<VIO_MAX_DIMENSIONS; i++) voxel[i] = (VIO_Real)index[i];
convert_voxel_to_world(volume, voxel, &wx, &wy, &wz);
if (sizes[ xyzv[VIO_Z] ] ==1)
general_inverse_transform_point_in_trans_plane(&forward_transform,
wx, wy, wz,
&inv_x, &inv_y, &inv_z);
else
grid_inverse_transform_point(&forward_transform,
wx, wy, wz,
&inv_x, &inv_y, &inv_z);
def_values[VIO_X] = inv_x - wx;
def_values[VIO_Y] = inv_y - wy;
def_values[VIO_Z] = inv_z - wz;
for(index[xyzv[VIO_Z+1]]=0; index[xyzv[VIO_Z+1]]<3; index[xyzv[VIO_Z+1]]++)
set_volume_real_value(volume,
index[0],index[1],index[2],index[3],index[4],
def_values[ index[ xyzv[VIO_Z+1] ]]);
prog_count++;
if (verbose)
update_progress_report(&progress, prog_count);
}
if (verbose)
terminate_progress_report(&progress);
delete_general_transform(&forward_transform);
grid_transform_ptr->inverse_flag = !(grid_transform_ptr->inverse_flag);
}
}
/* Write out the transform */
if (output_transform_file(argv[2], NULL, &transform) != OK) {
(void) fprintf(stderr, "%s: Error writing transform file %s\n",
argv[0], argv[2]);
exit(EXIT_FAILURE);
}
exit(EXIT_SUCCESS);
}
VIO_Status gradient3D_volume(FILE *ifd,
VIO_Volume data,
int xyzv[VIO_MAX_DIMENSIONS],
char *infile,
char *outfile,
int ndim,
char *history,
int curvature_flg)
{
float
*fdata, /* floating point storage for blurred volume */
*f_ptr, /* pointer to fdata */
tmp,
max_val,
min_val,
*dat_vector, /* temp storage of original row, col or slice vect. */
*dat_vecto2, /* storage of result of dat_vector*kern */
*kern; /* convolution kernel */
int
total_voxels,
vector_size_data, /* original size of row, col or slice vector */
array_size_pow2, /* actual size of vector/kernel data used in FFT */
/* routines - needs to be a power of two */
array_size;
int
data_offset; /* offset required to place original data (size n) */
/* into array (size m=2^n) so that data is centered*/
register int
slice_limit,
row,col,slice, /* counters to access original data */
vindex; /* counter to access vector and vecto2 */
int
slice_size, /* size of each data step - in bytes */
row_size, col_size;
char
full_outfilename[256]; /* name of output file */
progress_struct
progress; /* used to monitor progress of calculations */
VIO_Status
status;
int
sizes[3], /* number of rows, cols and slices */
pos[3]; /* Input order of rows, cols, slices */
VIO_Real
steps[3]; /* size of voxel step from center to center in x,y,z */
/*---------------------------------------------------------------------------------*/
/* start by setting up the raw data. */
/*---------------------------------------------------------------------------------*/
get_volume_sizes(data, sizes); /* rows,cols,slices */
get_volume_separations(data, steps);
slice_size = sizes[xyzv[VIO_Y]] * sizes[xyzv[VIO_X]]; /* sizeof one slice */
col_size = sizes[xyzv[VIO_Y]]; /* sizeof one column */
row_size = sizes[xyzv[VIO_X]]; /* sizeof one row */
total_voxels = sizes[xyzv[VIO_Y]]*sizes[xyzv[VIO_X]]*sizes[xyzv[VIO_Z]];
ALLOC(fdata, total_voxels);
f_ptr = fdata;
/* read in data of input file. */
set_file_position(ifd,(long)0);
status = io_binary_data(ifd,READ_FILE, fdata, sizeof(float), total_voxels);
if (status != OK)
print_error_and_line_num("problems reading binary data...\n",__FILE__, __LINE__);
/*--------------------------------------------------------------------------------------*/
/* get ready to start up the transformation. */
/*--------------------------------------------------------------------------------------*/
initialize_progress_report( &progress, FALSE, sizes[xyzv[VIO_Z]] + sizes[xyzv[VIO_Y]] + sizes[xyzv[VIO_X]] + 1,
"Gradient volume" );
/* note data is stored by rows (along x), then by cols (along y) then slices (along z) */
/*--------------------------------------------------------------------------------------*/
/* start with rows - i.e. the d/dx volume */
/*--------------------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------*/
/* determine size of data structures needed */
vector_size_data = sizes[xyzv[VIO_X]];
/* array_size_pow2 will hold the size of the arrays for FFT convolution,
remember that ffts require arrays 2^n in length */
array_size_pow2 = next_power_of_two(vector_size_data);
array_size = 2*array_size_pow2+1; /* allocate 2*, since each point is a */
/* complex number for FFT, and the plus 1*/
/* is for the zero offset FFT routine */
ALLOC(dat_vector, array_size);
ALLOC(dat_vecto2, array_size);
ALLOC(kern , array_size);
/* 1st calculate kern array for FT of 1st derivitive */
make_kernel_FT(kern,array_size_pow2, ABS(steps[xyzv[VIO_X]]));
if (curvature_flg) /* 2nd derivative kernel */
muli_vects(kern,kern,kern,array_size_pow2);
/* calculate offset for original data to be placed in vector */
data_offset = (array_size_pow2-sizes[xyzv[VIO_X]])/2;
max_val = -FLT_MAX;
min_val = FLT_MAX;
/* 2nd now convolve this kernel with the rows of the dataset */
slice_limit = 0;
switch (ndim) {
case 1: slice_limit = 0; break;
case 2: slice_limit = sizes[xyzv[VIO_Z]]; break;
case 3: slice_limit = sizes[xyzv[VIO_Z]]; break;
}
for (slice = 0; slice < slice_limit; slice++) { /* for each slice */
for (row = 0; row < sizes[xyzv[VIO_Y]]; row++) { /* for each row */
f_ptr = fdata + slice*slice_size + row*sizes[xyzv[VIO_X]];
memset(dat_vector,0,(2*array_size_pow2+1)*sizeof(float));
for (col=0; col< sizes[xyzv[VIO_X]]; col++) { /* extract the row */
dat_vector[1 +2*(col+data_offset) ] = *f_ptr++;
}
fft1(dat_vector,array_size_pow2,1);
muli_vects(dat_vecto2,dat_vector,kern,array_size_pow2);
fft1(dat_vecto2,array_size_pow2,-1);
f_ptr = fdata + slice*slice_size + row*sizes[xyzv[VIO_X]];
for (col=0; col< sizes[xyzv[VIO_X]]; col++) { /* put the row back */
vindex = 1 + 2*(col+data_offset);
*f_ptr = dat_vecto2[vindex]/array_size_pow2;
if (max_val<*f_ptr) max_val = *f_ptr;
if (min_val>*f_ptr) min_val = *f_ptr;
f_ptr++;
}
}
update_progress_report( &progress, slice+1 );
}
FREE(dat_vector);
FREE(dat_vecto2);
FREE(kern );
f_ptr = fdata;
set_volume_real_range(data, min_val, max_val);
printf("Making byte volume dx..." );
for(slice=0; slice<sizes[xyzv[VIO_Z]]; slice++) {
pos[xyzv[VIO_Z]] = slice;
for(row=0; row<sizes[xyzv[VIO_Y]]; row++) {
pos[xyzv[VIO_Y]] = row;
for(col=0; col<sizes[xyzv[VIO_X]]; col++) {
pos[xyzv[VIO_X]] = col;
tmp = CONVERT_VALUE_TO_VOXEL(data, *f_ptr);
SET_VOXEL_3D( data, pos[0], pos[1], pos[2], tmp);
f_ptr++;
}
}
}
if (!curvature_flg)
sprintf(full_outfilename,"%s_dx.mnc",outfile);
else
sprintf(full_outfilename,"%s_dxx.mnc",outfile);
if (debug)
print ("dx: min = %f, max = %f\n",min_val, max_val);
status = output_modified_volume(full_outfilename, NC_UNSPECIFIED, FALSE,
min_val, max_val, data, infile, history, NULL);
if (status != OK)
print_error_and_line_num("problems writing dx gradient data...\n",__FILE__, __LINE__);
/*--------------------------------------------------------------------------------------*/
/* now do cols - i.e. the d/dy volume */
/*--------------------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------*/
/* determine size of data structures needed */
set_file_position(ifd,0);
status = io_binary_data(ifd,READ_FILE, fdata, sizeof(float), total_voxels);
if (status != OK)
print_error_and_line_num("problems reading binary data...\n",__FILE__, __LINE__);
f_ptr = fdata;
vector_size_data = sizes[xyzv[VIO_Y]];
/* array_size_pow2 will hold the size of the arrays for FFT convolution,
remember that ffts require arrays 2^n in length */
array_size_pow2 = next_power_of_two(vector_size_data);
array_size = 2*array_size_pow2+1; /* allocate 2*, since each point is a */
/* complex number for FFT, and the plus 1*/
/* is for the zero offset FFT routine */
ALLOC(dat_vector, array_size);
ALLOC(dat_vecto2, array_size);
ALLOC(kern , array_size);
/* 1st calculate kern array for FT of 1st derivitive */
make_kernel_FT(kern,array_size_pow2, ABS(steps[xyzv[VIO_Y]]));
if (curvature_flg) /* 2nd derivative kernel */
muli_vects(kern,kern,kern,array_size_pow2);
/* calculate offset for original data to be placed in vector */
data_offset = (array_size_pow2-sizes[xyzv[VIO_Y]])/2;
/* 2nd now convolve this kernel with the rows of the dataset */
max_val = -FLT_MAX;
min_val = FLT_MAX;
switch (ndim) {
case 1: slice_limit = 0; break;
case 2: slice_limit = sizes[xyzv[VIO_Z]]; break;
case 3: slice_limit = sizes[xyzv[VIO_Z]]; break;
}
for (slice = 0; slice < slice_limit; slice++) { /* for each slice */
for (col = 0; col < sizes[xyzv[VIO_X]]; col++) { /* for each col */
/* f_ptr = fdata + slice*slice_size + row*sizeof(float); */
f_ptr = fdata + slice*slice_size + col;
memset(dat_vector,0,(2*array_size_pow2+1)*sizeof(float));
for (row=0; row< sizes[xyzv[VIO_Y]]; row++) { /* extract the col */
dat_vector[1 +2*(row+data_offset) ] = *f_ptr;
f_ptr += row_size;
}
fft1(dat_vector,array_size_pow2,1);
muli_vects(dat_vecto2,dat_vector,kern,array_size_pow2);
fft1(dat_vecto2,array_size_pow2,-1);
f_ptr = fdata + slice*slice_size + col;
for (row=0; row< sizes[xyzv[VIO_Y]]; row++) { /* put the col back */
vindex = 1 + 2*(row+data_offset);
*f_ptr = dat_vecto2[vindex]/array_size_pow2;
if (max_val<*f_ptr) max_val = *f_ptr;
if (min_val>*f_ptr) min_val = *f_ptr;
f_ptr += row_size;
}
}
update_progress_report( &progress, slice+sizes[xyzv[VIO_Z]]+1 );
}
FREE(dat_vector);
FREE(dat_vecto2);
FREE(kern );
f_ptr = fdata;
set_volume_real_range(data, min_val, max_val);
printf("Making byte volume dy..." );
for(slice=0; slice<sizes[xyzv[VIO_Z]]; slice++) {
pos[xyzv[VIO_Z]] = slice;
for(row=0; row<sizes[xyzv[VIO_Y]]; row++) {
pos[xyzv[VIO_Y]] = row;
for(col=0; col<sizes[xyzv[VIO_X]]; col++) {
pos[xyzv[VIO_X]] = col;
tmp = CONVERT_VALUE_TO_VOXEL(data, *f_ptr);
SET_VOXEL_3D( data, pos[0], pos[1], pos[2], tmp);
f_ptr++;
}
}
}
if (!curvature_flg)
sprintf(full_outfilename,"%s_dy.mnc",outfile);
else
sprintf(full_outfilename,"%s_dyy.mnc",outfile);
if (debug)
print ("dy: min = %f, max = %f\n",min_val, max_val);
status = output_modified_volume(full_outfilename, NC_UNSPECIFIED, FALSE,
min_val, max_val, data, infile, history, NULL);
if (status != OK)
print_error_and_line_num("problems writing dy gradient data...",__FILE__, __LINE__);
/*--------------------------------------------------------------------------------------*/
/* now do slices - i.e. the d/dz volume */
/*--------------------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------*/
/* determine size of data structures needed */
set_file_position(ifd,0);
status = io_binary_data(ifd,READ_FILE, fdata, sizeof(float), total_voxels);
if (status != OK)
print_error_and_line_num("problems reading binary data...\n",__FILE__, __LINE__);
f_ptr = fdata;
vector_size_data = sizes[xyzv[VIO_Z]];
/* array_size_pow2 will hold the size of the arrays for FFT convolution,
remember that ffts require arrays 2^n in length */
array_size_pow2 = next_power_of_two(vector_size_data);
array_size = 2*array_size_pow2+1; /* allocate 2*, since each point is a */
/* complex number for FFT, and the plus 1*/
/* is for the zero offset FFT routine */
ALLOC(dat_vector, array_size);
ALLOC(dat_vecto2, array_size);
ALLOC(kern , array_size);
if (ndim==1 || ndim==3) {
/* 1st calculate kern array for FT of 1st derivitive */
make_kernel_FT(kern,array_size_pow2, ABS(steps[xyzv[VIO_Z]]));
if (curvature_flg) /* 2nd derivative kernel */
muli_vects(kern,kern,kern,array_size_pow2);
/* calculate offset for original data to be placed in vector */
data_offset = (array_size_pow2-sizes[xyzv[VIO_Z]])/2;
/* 2nd now convolve this kernel with the slices of the dataset */
max_val = -FLT_MAX;
min_val = FLT_MAX;
for (col = 0; col < sizes[xyzv[VIO_X]]; col++) { /* for each column */
for (row = 0; row < sizes[xyzv[VIO_Y]]; row++) { /* for each row */
f_ptr = fdata + col*col_size + row;
memset(dat_vector,0,(2*array_size_pow2+1)*sizeof(float));
for (slice=0; slice< sizes[xyzv[VIO_Z]]; slice++) { /* extract the slice vector */
dat_vector[1 +2*(slice+data_offset) ] = *f_ptr;
f_ptr += slice_size;
}
fft1(dat_vector,array_size_pow2,1);
muli_vects(dat_vecto2,dat_vector,kern,array_size_pow2);
fft1(dat_vecto2,array_size_pow2,-1);
f_ptr = fdata + col*col_size + row;
for (slice=0; slice< sizes[xyzv[VIO_Z]]; slice++) { /* put the vector back */
vindex = 1 + 2*(slice+data_offset);
*f_ptr = dat_vecto2[vindex]/array_size_pow2;
if (max_val<*f_ptr) max_val = *f_ptr;
if (min_val>*f_ptr) min_val = *f_ptr;
f_ptr += slice_size;
}
}
update_progress_report( &progress, col + 2*sizes[xyzv[VIO_Z]] + 1 );
}
} /* if ndim */
else {
max_val = 0.00001;
min_val = 0.00000;
for (col = 0; col < sizes[xyzv[VIO_X]]; col++) { /* for each column */
for (row = 0; row < sizes[xyzv[VIO_Y]]; row++) { /* for each row */
*f_ptr = 0.0;
f_ptr++;
}
}
}
FREE(dat_vector);
FREE(dat_vecto2);
FREE(kern );
/* set up the correct info to copy the data back out in mnc */
f_ptr = fdata;
set_volume_real_range(data, min_val, max_val);
printf("Making byte volume dz..." );
for(slice=0; slice<sizes[xyzv[VIO_Z]]; slice++) {
pos[xyzv[VIO_Z]] = slice;
for(row=0; row<sizes[xyzv[VIO_Y]]; row++) {
pos[xyzv[VIO_Y]] = row;
for(col=0; col<sizes[xyzv[VIO_X]]; col++) {
pos[xyzv[VIO_X]] = col;
tmp = CONVERT_VALUE_TO_VOXEL(data, *f_ptr);
SET_VOXEL_3D( data, pos[0], pos[1], pos[2], tmp);
f_ptr++;
}
}
}
if (!curvature_flg)
sprintf(full_outfilename,"%s_dz.mnc",outfile);
else
sprintf(full_outfilename,"%s_dzz.mnc",outfile);
if (debug)
print ("dz: min = %f, max = %f\n",min_val, max_val);
status = output_modified_volume(full_outfilename, NC_UNSPECIFIED, FALSE,
min_val, max_val, data, infile, history, NULL);
if (status != OK)
print_error_and_line_num("problems writing dz gradient data...",__FILE__, __LINE__);
terminate_progress_report( &progress );
FREE(fdata);
return(status);
}
/* perform a median kernel operation on a volume */
Volume *median_dilation_kernel(Kernel * K, Volume * vol)
{
int x, y, z, c, i;
int sizes[MAX_VAR_DIMS];
progress_struct progress;
Volume tmp_vol;
double value;
unsigned int kvalue;
unsigned int neighbours[K->nelems];
if(verbose){
fprintf(stdout, "Median Dilation kernel\n");
}
get_volume_sizes(*vol, sizes);
initialize_progress_report(&progress, FALSE, sizes[2], "Median Dilation");
/* copy the volume */
tmp_vol = copy_volume(*vol);
for(z = -K->pre_pad[2]; z < sizes[0] - K->post_pad[2]; z++){
for(y = -K->pre_pad[1]; y < sizes[1] - K->post_pad[1]; y++){
for(x = -K->pre_pad[0]; x < sizes[2] - K->post_pad[0]; x++){
/* only modify background voxels */
value = get_volume_voxel_value(tmp_vol, z, y, x, 0, 0);
if(value == 0.0){
i = 0;
for(c = 0; c < K->nelems; c++){
kvalue = (unsigned int)get_volume_voxel_value(tmp_vol,
z + K->K[c][2],
y + K->K[c][1],
x + K->K[c][0],
0 + K->K[c][3],
0 + K->K[c][4]);
if(kvalue != 0){
neighbours[i] = kvalue;
i++;
}
}
/* only run this for adjacent voxels */
if(i > 0){
/* find the median of our little array */
qsort(&neighbours[0], (size_t) i, sizeof(unsigned int), &compare_ints);
/* store the median value */
set_volume_voxel_value(*vol, z, y, x, 0, 0,
(double)neighbours[(int)floor((i - 1) / 2)]);
}
}
/* else just copy the original value over */
else {
set_volume_voxel_value(*vol, z, y, x, 0, 0, value);
}
}
}
update_progress_report(&progress, z + 1);
}
delete_volume(tmp_vol);
terminate_progress_report(&progress);
return (vol);
}
int main(
int argc,
char *argv[] )
{
STRING volume_filename;
STRING output_filename;
Real x, y, z, xc, yc, zc, xp, yp, zp, len, pos;
Real value, scaling, min_value, max_value;
int v[MAX_DIMENSIONS], sizes[MAX_DIMENSIONS];
Real voxel[MAX_DIMENSIONS], scale;
Volume volume;
initialize_argument_processing( argc, argv );
if( !get_string_argument( "", &volume_filename ) ||
!get_string_argument( "", &output_filename ) ||
!get_real_argument( 0.0, &x ) ||
!get_real_argument( 0.0, &y ) ||
!get_real_argument( 0.0, &z ) ||
!get_real_argument( 0.0, &scaling ) )
{
return( 1 );
}
len = sqrt( x * x + y * y + z * z );
x /= len;
y /= len;
z /= len;
if( input_volume( volume_filename, 3, File_order_dimension_names,
NC_UNSPECIFIED, FALSE, 0.0, 0.0,
TRUE, &volume, NULL ) != OK )
return( 1 );
get_volume_sizes( volume, sizes );
get_volume_real_range( volume, &min_value, &max_value );
voxel[0] = (Real) (sizes[0]-1) / 2.0;
voxel[1] = (Real) (sizes[1]-1) / 2.0;
voxel[2] = (Real) (sizes[2]-1) / 2.0;
convert_voxel_to_world( volume, voxel, &xc, &yc, &zc );
BEGIN_ALL_VOXELS( volume, v[0], v[1], v[2], v[3], v[4] )
voxel[0] = (Real) v[0];
voxel[1] = (Real) v[1];
voxel[2] = (Real) v[2];
convert_voxel_to_world( volume, voxel, &xp, &yp, &zp );
pos = (xp - xc) * x + (yp - yc) * y + (zp - zc) * z;
scale = 1.0 + pos * scaling;
value = get_volume_real_value( volume, v[0], v[1], v[2], v[3], v[4] );
value *= scale;
if( value < min_value )
value = min_value;
else if( value > max_value )
value = max_value;
set_volume_real_value( volume, v[0], v[1], v[2], v[3], v[4], value );
END_ALL_VOXELS
(void) output_modified_volume( output_filename, NC_UNSPECIFIED, FALSE,
0.0, 0.0, volume, volume_filename,
"Scaled\n", NULL );
return( 0 );
}
/* return resulting totals and weights volumes */
void regrid_arb_path(char *coord_fn, char *data_fn, int buff_size,
VIO_Volume * totals, VIO_Volume * weights, int v_size,
double regrid_floor, double regrid_ceil)
{
Coord_list coord_buf;
double *data_buf = NULL;
size_t data_buf_alloc_size = 0;
int sizes[MAX_VAR_DIMS];
int c, v;
int total_pts;
double value;
int valid;
/* global max-min counters */
double v_min, v_max;
double x_min, y_min, z_min;
double x_max, y_max, z_max;
/* loop max-min counters */
double l_v_min, l_v_max;
double l_x_min, l_y_min, l_z_min;
double l_x_max, l_y_max, l_z_max;
/* get volume info */
get_volume_sizes(*totals, sizes);
/* check for the config file */
if(!file_exists(coord_fn)){
fprintf(stderr, "Couldn't find config file %s.\n\n", coord_fn);
exit(EXIT_FAILURE);
}
/* initialise the parser with the config file */
if(!init_arb_path(coord_fn, data_fn)){
fprintf(stderr, "Failed to init arb_path, this isn't good\n");
exit(EXIT_FAILURE);
}
/* get some co-ordinates */
if(verbose){
fprintf(stdout, " + Doing arbitrary path (vector: %d)\n", v_size);
}
total_pts = 0;
v_min = DBL_MAX;
v_max = -DBL_MAX;
x_min = y_min = z_min = DBL_MAX;
x_max = y_max = z_max = -DBL_MAX;
coord_buf = get_some_arb_path_coords(buff_size);
while(coord_buf->n_pts != 0){
/* grow data_buf if we have to */
if(coord_buf->n_pts * v_size > data_buf_alloc_size){
data_buf_alloc_size = coord_buf->n_pts * v_size;
data_buf = realloc(data_buf, data_buf_alloc_size * sizeof(*data_buf));
}
/* get the data */
if(!get_some_arb_path_data
(data_buf, in_dtype, in_is_signed, coord_buf->n_pts, v_size)){
fprintf(stderr, "failed getting data\n");
exit(EXIT_FAILURE);
}
total_pts += coord_buf->n_pts;
if(verbose){
fprintf(stdout, " | %d co-ords total: %d ", coord_buf->n_pts, total_pts);
fflush(stdout);
}
/* regrid (do the nasty) */
l_v_min = DBL_MAX;
l_v_max = -DBL_MAX;
l_x_min = l_y_min = l_z_min = DBL_MAX;
l_x_max = l_y_max = l_z_max = -DBL_MAX;
for(c = 0; c < coord_buf->n_pts; c++){
/* check if this point is in range */
valid = 1;
for(v = 0; v < v_size; v++){
value = data_buf[(c * v_size) + v];
if(value < regrid_floor || value > regrid_ceil){
valid = 0;
}
else {
/* do range calculation */
if(verbose){
if(value > l_v_max){
l_v_max = value;
}
else if(value < l_v_min){
l_v_min = value;
}
}
}
// fprintf(stderr, "Value: %g valid %d\n", value, valid);
}
// fprintf(stderr, "VV %d [%g:%g:%g]\n", valid,
// coord_buf->pts[c].coord[0],
// coord_buf->pts[c].coord[1],
// coord_buf->pts[c].coord[2]
// );
if(valid){
regrid_point(totals, weights,
coord_buf->pts[c].coord[0],
coord_buf->pts[c].coord[1],
coord_buf->pts[c].coord[2], v_size, &data_buf[c * v_size]);
/* coord max-min storage */
if(verbose){
if(coord_buf->pts[c].coord[0] > l_x_max){
l_x_max = coord_buf->pts[c].coord[0];
}
else if(coord_buf->pts[c].coord[0] < l_x_min){
l_x_min = coord_buf->pts[c].coord[0];
}
if(coord_buf->pts[c].coord[1] > l_y_max){
l_y_max = coord_buf->pts[c].coord[1];
}
else if(coord_buf->pts[c].coord[1] < l_y_min){
l_y_min = coord_buf->pts[c].coord[1];
}
if(coord_buf->pts[c].coord[2] > l_z_max){
l_z_max = coord_buf->pts[c].coord[2];
}
else if(coord_buf->pts[c].coord[2] < l_z_min){
l_z_min = coord_buf->pts[c].coord[2];
}
}
}
}
if(verbose){
fprintf(stdout, " xyz [%4.1g:%4.1g:%4.1g] : [%4.1g:%4.1g:%4.1g] v: [%g:%g]\n",
l_x_min, l_y_min, l_z_min, l_x_max, l_y_max, l_z_max, l_v_min, l_v_max);
}
/* update global counters */
if(verbose){
if(l_v_min < v_min){
v_min = l_v_min;
}
if(l_v_max > v_max){
v_max = l_v_max;
}
if(l_x_min < x_min){
x_min = l_x_min;
}
if(l_y_min < y_min){
y_min = l_y_min;
}
if(l_z_min < z_min){
z_min = l_z_min;
}
if(l_x_max > x_max){
x_max = l_x_max;
}
if(l_y_max > y_max){
y_max = l_y_max;
}
if(l_z_max > z_max){
z_max = l_z_max;
}
}
/* get the next lot of co-ordinates */
coord_buf = get_some_arb_path_coords(buff_size);
}
if(verbose){
fprintf(stdout,
" | == global xyz [%4.1g:%4.1g:%4.1g] : [%4.1g:%4.1g:%4.1g] v: [%g:%g]\n",
x_min, y_min, z_min, x_max, y_max, z_max, v_min, v_max);
}
/* finish up */
end_arb_path();
}
int main(int argc, char *argv[]) {
int v1, v2, v3, v4;
int sizes[VIO_MAX_DIMENSIONS], grid_sizes[4];
int n_concat_transforms, i;
VIO_STR arg_string;
char *input_volume_name;
char *input_xfm;
VIO_STR outfile;
VIO_Real w1, w2, w3;
VIO_Real nw1, nw2, nw3;
VIO_Real original[3], transformed[3];
VIO_Real value;
VIO_Real cosine[3];
VIO_Real original_separation[3], grid_separation[4];
VIO_Real original_starts[3], grid_starts[4];
VIO_Volume eval_volume, new_grid;
VIO_General_transform xfm, *voxel_to_world;
VIO_STR *dimnames, dimnames_grid[4];
VIO_progress_struct progress;
arg_string = time_stamp(argc, argv);
/* Check arguments */
if(ParseArgv(&argc, argv, argTable, 0) || (argc != 4)){
fprintf(stderr, "\nUsage: %s [options] input.mnc input.xfm output_grid.mnc\n", argv[0]);
fprintf(stderr, " %s -help\n\n", argv[0]);
exit(EXIT_FAILURE);
}
input_volume_name = argv[1];
input_xfm = argv[2];
outfile = argv[3];
/* check for the infile and outfile */
if(access(input_volume_name, F_OK) != 0){
fprintf(stderr, "%s: Couldn't find %s\n\n", argv[0], input_volume_name);
exit(EXIT_FAILURE);
}
if(access(input_xfm, F_OK) != 0) {
fprintf(stderr, "%s: Couldn't find %s\n\n", argv[0], input_xfm);
exit(EXIT_FAILURE);
}
if(access(outfile, F_OK) == 0 && !clobber){
fprintf(stderr, "%s: %s exists! (use -clobber to overwrite)\n\n", argv[0], outfile);
exit(EXIT_FAILURE);
}
/*--- input the volume */
/*
if( input_volume( input_volume_name, 3, NULL, MI_ORIGINAL_TYPE,
FALSE, 0.0, 0.0, TRUE, &eval_volume,(minc_input_options *) NULL ) != OK )
return( 1 );
*/
if (input_volume_header_only( input_volume_name, 3, NULL, &eval_volume,(minc_input_options *) NULL ) != VIO_OK ) {
return( 1 );
}
/* get information about the volume */
get_volume_sizes( eval_volume, sizes );
voxel_to_world = get_voxel_to_world_transform(eval_volume);
dimnames = get_volume_dimension_names(eval_volume);
get_volume_separations(eval_volume, original_separation);
get_volume_starts(eval_volume, original_starts);
/* create new 4D volume, last three dims same as other volume,
first dimension being the vector dimension. */
for(i=1; i < 4; i++) {
dimnames_grid[i] = dimnames[i-1];
grid_separation[i] = original_separation[i-1];
grid_sizes[i] = sizes[i-1];
grid_starts[i] = original_starts[i-1];
}
dimnames_grid[0] = "vector_dimension";
grid_sizes[0] = 3;
grid_separation[0] = 1;
grid_starts[0] = 0;
new_grid = create_volume(4, dimnames_grid, NC_SHORT, FALSE, 0.0, 0.0);
//set_voxel_to_world_transform(new_grid, voxel_to_world);
// initialize the new grid volume, otherwise the output will be
// garbage...
set_volume_real_range(new_grid, -100, 100);
set_volume_sizes(new_grid, grid_sizes);
set_volume_separations(new_grid, grid_separation);
set_volume_starts(new_grid, grid_starts);
/*
for (i=0; i < 3; i++) {
get_volume_direction_cosine(eval_volume, i, cosine);
set_volume_direction_cosine(new_grid, i+1, cosine);
}
*/
alloc_volume_data(new_grid);
/* get the transforms */
if( input_transform_file( input_xfm, &xfm ) != VIO_OK )
return( 1 );
/* see how many transforms will be applied */
n_concat_transforms = get_n_concated_transforms( &xfm );
printf("Number of transforms to be applied: %d\n", n_concat_transforms);
initialize_progress_report(&progress, FALSE, sizes[0], "Processing");
/* evaluate the transform at every voxel, keep the displacement
in the three cardinal directions */
for( v1 = 0; v1 < sizes[0]; ++v1 ) {
update_progress_report(&progress, v1 + 1);
for( v2 = 0; v2 < sizes[1]; ++v2 ) {
for( v3 = 0; v3 < sizes[2]; ++v3 ) {
convert_3D_voxel_to_world(eval_volume,
v1, v2, v3,
&original[0], &original[1], &original[2]);
general_transform_point(&xfm,
original[0], original[1], original[2],
&transformed[0], &transformed[1], &transformed[2]);
for(i=0; i < 3; i++) {
value = transformed[i] - original[i];
set_volume_real_value(new_grid, i, v1, v2, v3, 0, value);
}
}
}
}
terminate_progress_report(&progress);
printf("Outputting volume.\n");
output_volume(outfile, MI_ORIGINAL_TYPE, TRUE, 0.0, 0.0, new_grid, arg_string, NULL);
return(0);
}
/* xcorr = sum((a*b)^2) / (sqrt(sum(a^2)) * sqrt(sum(b^2)) */
VIO_Volume *lcorr_kernel(Kernel * K, VIO_Volume * vol, VIO_Volume *cmp)
{
int x, y, z, c;
double value, v1, v2;
double ssum_v1, ssum_v2, sum_prd, denom;
int sizes[MAX_VAR_DIMS];
progress_struct progress;
Volume tmp_vol;
if(verbose){
fprintf(stdout, "Local Correlation kernel\n");
}
get_volume_sizes(*vol, sizes);
initialize_progress_report(&progress, FALSE, sizes[2], "Local Correlation");
/* copy the volume */
tmp_vol = copy_volume(*vol);
/* zero the output volume */
for(z = sizes[0]; z--;){
for(y = sizes[1]; y--;){
for(x = sizes[2]; x--;){
set_volume_voxel_value(*vol, z, y, x, 0, 0, 0);
}
}
}
/* set output range */
set_volume_real_range(*vol, 0.0, 1.0);
for(z = -K->pre_pad[2]; z < sizes[0] - K->post_pad[2]; z++){
for(y = -K->pre_pad[1]; y < sizes[1] - K->post_pad[1]; y++){
for(x = -K->pre_pad[0]; x < sizes[2] - K->post_pad[0]; x++){
/* init counters */
ssum_v1 = ssum_v2 = sum_prd = 0;
for(c = 0; c < K->nelems; c++){
v1 = get_volume_real_value(tmp_vol,
z + K->K[c][2],
y + K->K[c][1],
x + K->K[c][0], 0 + K->K[c][3],
0 + K->K[c][4]) * K->K[c][5];
v2 = get_volume_real_value(*cmp,
z + K->K[c][2],
y + K->K[c][1],
x + K->K[c][0], 0 + K->K[c][3],
0 + K->K[c][4]) * K->K[c][5];
/* increment counters */
ssum_v1 += v1*v1;
ssum_v2 += v2*v2;
sum_prd += v1*v2;
}
denom = sqrt(ssum_v1 * ssum_v2);
value = (denom == 0.0) ? 0.0 : sum_prd / denom;
set_volume_real_value(*vol, z, y, x, 0, 0, value);
}
}
update_progress_report(&progress, z + 1);
}
terminate_progress_report(&progress);
/* tidy up */
delete_volume(tmp_vol);
return (vol);
}
/* ----------------------------- MNI Header -----------------------------------
@NAME : compute_chamfer
@INPUT/OUTPUT: chamfer
The original input volume will be destroyed and replaced
with the resulting chamfer distance volume. The chamfer
will contains 0's where the mask was and values > 0.0
for all other voxels, where the value is an estimate of
the distance to the the nearest voxel of the mask.
@RETURNS : ERROR if error, OK otherwise
@DESCRIPTION: Uses an idea from georges, who got it from claire,
who got it from Borgefors
@GLOBALS :
@CALLS :
@CREATED : Nov 2, 1998 Louis
@MODIFIED :
---------------------------------------------------------------------------- */
VIO_Status compute_chamfer(VIO_Volume chamfer, VIO_Real max_val)
{
VIO_Real
mask_f[3][3][3],
mask_b[3][3][3],
zero, min,
vox_min, vox_max,
val, val2;
int
sizes[VIO_MAX_DIMENSIONS],
i,j,k,
ind0,ind1,ind2;
VIO_progress_struct
progress;
get_volume_sizes(chamfer, sizes);
get_volume_voxel_range(chamfer, &vox_min, &vox_max);
zero = CONVERT_VALUE_TO_VOXEL(chamfer,0.0);
/* init chamfer to be binary valued with 0.0 on the object,
and infinity (or vox_max) elsewhere */
if (debug) print ("initing chamfer vol (%d %d %d)\n",sizes[0],sizes[1],sizes[2]);
for(ind0=0; ind0<sizes[0]; ind0++) {
for(ind1=0; ind1<sizes[1]; ind1++) {
for(ind2=0; ind2<sizes[2]; ind2++) {
GET_VOXEL_3D(val, chamfer, ind0, ind1, ind2);
if (val == zero) {
SET_VOXEL_3D(chamfer, ind0, ind1, ind2, vox_max );
}
else {
SET_VOXEL_3D(chamfer, ind0, ind1, ind2, vox_min);
}
}
}
}
if (debug) print ("building mask\n");
build_mask(chamfer, mask_f, mask_b);
set_volume_real_range(chamfer, 0.0, max_val);
zero = CONVERT_VALUE_TO_VOXEL(chamfer,0.0);
if (verbose) initialize_progress_report( &progress, TRUE, sizes[0],
"forward pass");
for(ind0=1; ind0<sizes[0]-1; ind0++) {
for(ind1=1; ind1<sizes[1]-1; ind1++) {
for(ind2=1; ind2<sizes[2]-1; ind2++) {
GET_VALUE_3D(val, chamfer, ind0, ind1, ind2);
if (val != zero) { /* then apply forward mask */
min = val;
for(i=-1; i<=+1; i++) {
for(j=-1; j<=+1; j++) {
for(k=-1; k<=+1; k++) {
GET_VALUE_3D(val, chamfer, i+ind0, j+ind1, k+ind2);
val2 = val + mask_f[i+1][j+1][k+1];
min = MIN (min, val2);
}
}
}
min = convert_value_to_voxel(chamfer, min);
SET_VOXEL_3D(chamfer, ind0, ind1, ind2, min );
} /* if val != 0.0 */
} /* ind2 */
} /* ind1 */
if (verbose) update_progress_report( &progress, ind0+1 );
} /* ind0 */
if (verbose) terminate_progress_report( &progress );
if (verbose) initialize_progress_report( &progress, TRUE, sizes[0],
"reverse pass");
for(ind0=sizes[0]-2; ind0>=1; ind0--) {
for(ind1=sizes[1]-2; ind1>=1; ind1--) {
for(ind2=sizes[2]-2; ind2>=1; ind2--) {
GET_VALUE_3D(val, chamfer, ind0, ind1, ind2);
if (val != zero) { /* then apply backwardmask */
min = val;
for(i=-1; i<=1; i++) {
for(j=-1; j<=+1; j++) {
for(k=-1; k<=+1; k++) {
GET_VALUE_3D(val, chamfer, i+ind0, j+ind1, k+ind2);
val2 = val + mask_b[i+1][j+1][k+1];
min = MIN (min, val2);
}
}
}
min = convert_value_to_voxel(chamfer, min);
SET_VOXEL_3D(chamfer, ind0, ind1, ind2, min );
} /* if val != 0.0 */
} /* ind2 */
} /* ind1 */
if (verbose) update_progress_report( &progress, ind0+1 );
} /* ind0 */
if (verbose) terminate_progress_report( &progress );
return (OK);
}
/* from the original 2 pass Borgefors alg */
Volume *distance_kernel(Kernel * K, Volume * vol, double bg)
{
int x, y, z, c;
double value, min;
int sizes[MAX_VAR_DIMS];
progress_struct progress;
Kernel *k1, *k2;
/* split the Kernel */
k1 = new_kernel(K->nelems);
k2 = new_kernel(K->nelems);
split_kernel(K, k1, k2);
setup_pad_values(k1);
setup_pad_values(k2);
if(verbose){
fprintf(stdout, "Distance kernel - background %g\n", bg);
fprintf(stdout, "forward direction kernel:\n");
print_kernel(k1);
fprintf(stdout, "\nreverse direction kernel:\n");
print_kernel(k2);
}
get_volume_sizes(*vol, sizes);
initialize_progress_report(&progress, FALSE, sizes[2] * 2, "Distance");
/* forward raster direction */
for(z = -K->pre_pad[2]; z < sizes[0] - K->post_pad[2]; z++){
for(y = -K->pre_pad[1]; y < sizes[1] - K->post_pad[1]; y++){
for(x = -K->pre_pad[0]; x < sizes[2] - K->post_pad[0]; x++){
if(get_volume_real_value(*vol, z, y, x, 0, 0) != bg){
/* find the minimum */
min = DBL_MAX;
for(c = 0; c < k1->nelems; c++){
value = get_volume_real_value(*vol,
z + k1->K[c][2],
y + k1->K[c][1],
x + k1->K[c][0],
0 + k1->K[c][3], 0 + k1->K[c][4]) + 1;
if(value < min){
min = value;
}
}
set_volume_real_value(*vol, z, y, x, 0, 0, min);
}
}
}
update_progress_report(&progress, z + 1);
}
/* reverse raster direction */
for(z = sizes[0] - k2->post_pad[2] - 1; z >= -k2->pre_pad[2]; z--){
for(y = sizes[1] - k2->post_pad[1] - 1; y >= -k2->pre_pad[1]; y--){
for(x = sizes[2] - k2->post_pad[0] - 1; x >= -k2->pre_pad[0]; x--){
min = get_volume_real_value(*vol, z, y, x, 0, 0);
if(min != bg){
/* find the minimum distance to bg in the neighbouring vectors */
for(c = 0; c < k2->nelems; c++){
value = get_volume_real_value(*vol,
z + k2->K[c][2],
y + k2->K[c][1],
x + k2->K[c][0],
0 + k2->K[c][3], 0 + k2->K[c][4]) + 1;
if(value < min){
min = value;
}
}
set_volume_real_value(*vol, z, y, x, 0, 0, min);
}
}
}
update_progress_report(&progress, sizes[2] + z + 1);
}
free(k1);
free(k2);
terminate_progress_report(&progress);
return (vol);
}
/* resulting groups are sorted WRT size */
Volume *group_kernel(Kernel * K, Volume * vol, double bg)
{
int x, y, z;
int sizes[MAX_VAR_DIMS];
progress_struct progress;
Volume tmp_vol;
Kernel *k1, *k2;
unsigned int *equiv;
unsigned int *counts;
unsigned int *trans;
unsigned int neighbours[K->nelems];
/* counters */
unsigned int c;
unsigned int value;
unsigned int group_idx; /* label for the next group */
unsigned int num_groups;
unsigned int min_label;
unsigned int curr_label;
unsigned int prev_label;
unsigned int num_matches;
/* structure for group data */
Group_info *group_data;
/* split the Kernel into forward and backwards kernels */
k1 = new_kernel(K->nelems);
k2 = new_kernel(K->nelems);
split_kernel(K, k1, k2);
setup_pad_values(k1);
setup_pad_values(k2);
if(verbose){
fprintf(stdout, "Group kernel - background %g\n", bg);
fprintf(stdout, "forward direction kernel:\n");
print_kernel(k1);
fprintf(stdout, "\nreverse direction kernel:\n");
print_kernel(k2);
}
get_volume_sizes(*vol, sizes);
initialize_progress_report(&progress, FALSE, sizes[2], "Groups");
/* copy and then zero out the original volume */
tmp_vol = copy_volume(*vol);
for(z = sizes[0]; z--;){
for(y = sizes[1]; y--;){
for(x = sizes[2]; x--;){
set_volume_voxel_value(*vol, z, y, x, 0, 0, 0);
}
}
}
/* pass 1 - forward direction (we assume a symmetric kernel) */
/* our first group is given the label 1 */
group_idx = 1;
/* initialise the equiv and counts arrays */
SET_ARRAY_SIZE(equiv, 0, group_idx, 500);
equiv[0] = 0;
SET_ARRAY_SIZE(counts, 0, group_idx, 500);
counts[0] = 0;
for(z = -k1->pre_pad[2]; z < sizes[0] - k1->post_pad[2]; z++){
for(y = -k1->pre_pad[1]; y < sizes[1] - k1->post_pad[1]; y++){
for(x = -k1->pre_pad[0]; x < sizes[2] - k1->post_pad[0]; x++){
if(get_volume_voxel_value(tmp_vol, z, y, x, 0, 0) != bg){
/* search this voxels neighbours */
num_matches = 0;
min_label = INT_MAX;
for(c = 0; c < k1->nelems; c++){
value = (unsigned int)get_volume_voxel_value(*vol,
z + k1->K[c][2],
y + k1->K[c][1],
x + k1->K[c][0],
0 + k1->K[c][3],
0 + k1->K[c][4]);
if(value != 0){
if(value < min_label){
min_label = value;
}
neighbours[num_matches] = value;
num_matches++;
}
}
switch (num_matches){
case 0:
/* no neighbours, make a new label and increment */
set_volume_voxel_value(*vol, z, y, x, 0, 0, (Real) group_idx);
SET_ARRAY_SIZE(equiv, group_idx, group_idx + 1, 500);
equiv[group_idx] = group_idx;
SET_ARRAY_SIZE(counts, group_idx, group_idx + 1, 500);
counts[group_idx] = 1;
group_idx++;
break;
case 1:
/* only one neighbour, no equivalences needed */
set_volume_voxel_value(*vol, z, y, x, 0, 0, (Real) min_label);
counts[min_label]++;
break;
default:
/* more than one neighbour */
/* first sort the neighbours array */
qsort(&neighbours[0], (size_t) num_matches, sizeof(unsigned int),
&compare_ints);
/* find the minimum possible label for this voxel, */
/* this is done by descending through each neighbours */
/* equivalences until an equivalence equal to itself */
/* is found */
prev_label = -1;
for(c = 0; c < num_matches; c++){
curr_label = neighbours[c];
/* recurse this label if we haven't yet */
if(curr_label != prev_label){
while(equiv[curr_label] != equiv[equiv[curr_label]]){
curr_label = equiv[curr_label];
}
/* check against the current minimum value */
if(equiv[curr_label] < min_label){
min_label = equiv[curr_label];
}
}
prev_label = neighbours[c];
}
/* repeat, setting equivalences to the min_label */
prev_label = -1;
for(c = 0; c < num_matches; c++){
curr_label = neighbours[c];
if(curr_label != prev_label){
while(equiv[curr_label] != equiv[equiv[curr_label]]){
curr_label = equiv[curr_label];
equiv[curr_label] = min_label;
}
/* set the label itself */
if(equiv[neighbours[c]] != min_label){
equiv[neighbours[c]] = min_label;
}
}
prev_label = neighbours[c];
}
/* finally set the voxel in question to the minimum value */
set_volume_voxel_value(*vol, z, y, x, 0, 0, (Real) min_label);
counts[min_label]++;
break;
} /* end case */
}
}
}
update_progress_report(&progress, z + 1);
}
terminate_progress_report(&progress);
/* reduce the equiv and counts array */
num_groups = 0;
for(c = 0; c < group_idx; c++){
/* if this equivalence is not resolved yet */
if(c != equiv[c]){
/* find the min label value */
min_label = equiv[c];
while(min_label != equiv[min_label]){
min_label = equiv[min_label];
}
/* update the label and its counters */
equiv[c] = min_label;
counts[min_label] += counts[c];
counts[c] = 0;
}
else {
num_groups++;
}
}
/* Allocate space for the array of groups */
group_data = (Group_info *) malloc(num_groups * sizeof(Group_info));
num_groups = 0;
for(c = 0; c < group_idx; c++){
if(counts[c] > 0){
/* allocate space for this element */
group_data[num_groups] = malloc(sizeof(group_info_struct));
group_data[num_groups]->orig_label = equiv[c];
group_data[num_groups]->count = counts[c];
num_groups++;
}
}
/* sort the groups by the count size */
if(verbose){
fprintf(stdout, "Found %d unique groups from %d, sorting...\n", num_groups,
group_idx);
}
qsort(group_data, num_groups, sizeof(Group_info), &compare_groups);
/* set up the transpose array */
trans = (unsigned int *)malloc(sizeof(unsigned int) * group_idx);
for(c = 0; c < num_groups; c++){
trans[group_data[c]->orig_label] = c + 1; /* +1 to bump past 0 */
}
/* pass 2 - resolve equivalences in the output data */
if(verbose){
fprintf(stdout, "Resolving equivalences...\n");
}
for(z = sizes[0]; z--;){
for(y = sizes[1]; y--;){
for(x = sizes[2]; x--;){
value = (unsigned int)get_volume_voxel_value(*vol, z, y, x, 0, 0);
if(value != 0){
value = trans[equiv[value]];
set_volume_voxel_value(*vol, z, y, x, 0, 0, (Real) value);
}
}
}
}
/* tidy up */
delete_volume(tmp_vol);
for(c = 0; c < num_groups; c++){
free(group_data[c]);
}
free(group_data);
free(trans);
free(k1);
free(k2);
return (vol);
}
/* ----------------------------- MNI Header -----------------------------------
@NAME : average_smoothness
@INPUT : tmp_lambda_file - tmp file with unaveraged smoothness values
@OUTPUT : lambda_file - file where final values are to be placed
@RETURNS : nothing
@DESCRIPTION: routine to create buffers for calculating smoothness of field
@CREATED : Nov. 3, 1997, J. Taylor
@MODIFIED :
---------------------------------------------------------------------------- */
int average_smoothness(char *tmp_lambda_file, char *lambda_file, double scalar)
{
Volume volume;
nc_type in_nc_type;
int in_signed_flag = FALSE;
volume_input_struct volume_input;
int v1, v2, v3;
int num_dim;
int sizes[MAX_DIMENSIONS];
double avg, values[8];
int i;
if(start_volume_input(tmp_lambda_file, 3, NULL, NC_UNSPECIFIED, FALSE,
0.0, 0.0, TRUE, &volume,
(minc_input_options *) NULL, &volume_input) != OK){
fprintf(stderr,"\nError opening %s.\n", tmp_lambda_file);
exit(EXIT_FAILURE);
}
in_nc_type = get_volume_nc_data_type(volume, &in_signed_flag);
get_volume_sizes(volume, sizes);
num_dim = get_volume_n_dimensions(volume);
cancel_volume_input(volume, &volume_input);
if( input_volume(tmp_lambda_file, 3, NULL, NC_FLOAT, FALSE, 0.0, 0.0,
TRUE, &volume, (minc_input_options *) NULL) != OK) {
(void) fprintf(stderr, "Error reading file \"%s\"\n", tmp_lambda_file);
return FALSE;
}
for(v1=0; v1<sizes[0]; v1++) {
for(v2=0; v2<sizes[1]; v2++) {
for(v3=0; v3<sizes[2]; v3++) {
avg = 0.0;
if((v1<sizes[0]-1) && (v2<sizes[1]-1) && (v3<sizes[2])-1) {
values[0] = get_volume_real_value(volume, v1+1, v2, v3, 0, 0);
values[1] = get_volume_real_value(volume, v1, v2+1, v3, 0, 0);
values[2] = get_volume_real_value(volume, v1, v2, v3+1, 0, 0);
values[3] = get_volume_real_value(volume,v1+1, v2+1, v3, 0, 0);
values[4] = get_volume_real_value(volume, v1+1,v2, v3+1, 0, 0);
values[5] = get_volume_real_value(volume, v1, v2+1,v3+1, 0, 0);
values[6] = get_volume_real_value(volume, v1, v2, v3, 0, 0);
values[7] = get_volume_real_value(volume, v1+1, v2+1,v3+1,0,0);
for(i=0; i<8; i++) {
if(values[i] != INVALID_DATA)
avg += values[i];
else {
avg = INVALID_DATA;
i = 8;
}
}
}
else
avg = INVALID_DATA;
if (avg == 0.0)
avg = INVALID_DATA;
if (avg != INVALID_DATA)
avg = scalar * 8.0 / pow(avg, (1.0 / num_dim));
set_volume_real_value(volume, v1, v2, v3, 0, 0, avg);
}
}
}
if( output_modified_volume(lambda_file, in_nc_type, in_signed_flag,
0.0, 0.0, volume, tmp_lambda_file, NULL,
(minc_output_options *) NULL) != OK) {
(void) fprintf(stderr, "Error writing file \"%s\"\n", lambda_file);
return FALSE;
}
return TRUE;
}