static void
readMapFile(const char * const rmapFileName,
xelval const maxval,
gray * const lumamap) {
int rmcols, rmrows;
gray rmmaxv;
int rmformat;
FILE * rmapfP;
rmapfP = pm_openr(rmapFileName);
pgm_readpgminit(rmapfP, &rmcols, &rmrows, &rmmaxv, &rmformat);
if (rmmaxv != maxval)
pm_error("maxval in map file (%u) different from input (%u)",
rmmaxv, maxval);
if (rmrows != 1)
pm_error("Map must have 1 row. Yours has %u", rmrows);
if (rmcols != maxval + 1)
pm_error("Map must have maxval + 1 (%u) columns. Yours has %u",
maxval + 1, rmcols);
pgm_readpgmrow(rmapfP, lumamap, maxval+1, rmmaxv, rmformat);
pm_close(rmapfP);
}
static void
convertPgmRaster(FILE * const ifP,
int const format,
xelval const maxval,
unsigned int const cols,
unsigned int const rows,
FILE * const ofP,
unsigned int const bytesPerLine,
unsigned char * const data) {
gray * const pixels = pgm_allocrow(cols);
unsigned int row;
for (row = 0; row < rows; ++row) {
unsigned char * p;
unsigned int col;
size_t bytesWritten;
p = &data[0];
pgm_readpgmrow(ifP, pixels, cols, maxval, format);
for (col = 0; col < cols; ++col)
*p++ = (unsigned char) pixels[col];
bytesWritten = fwrite(data, 1, bytesPerLine, ofP);
if (bytesWritten != bytesPerLine)
pm_error("File write error on Row %u", row);
}
pgm_freerow(pixels);
}
int
main(int argc, const char * argv[]) {
FILE * ifP;
gray * grayrow;
int rows;
int cols;
unsigned int depth;
int format;
unsigned int padright;
unsigned int row;
gray maxval;
const char * inputFile;
pm_proginit(&argc, argv);
if (argc-1 < 1)
inputFile = "-";
else {
inputFile = argv[1];
if (argc-1 > 2)
pm_error("Too many arguments. The only argument is the optional "
"input file name");
}
ifP = pm_openr(inputFile);
pgm_readpgminit(ifP, &cols, &rows, &maxval, &format);
grayrow = pgm_allocrow(cols);
depth = pm_maxvaltobits(maxval);
/* Compute padding to round cols up to the nearest multiple of 32. */
padright = ((cols + 31) / 32) * 32 - cols;
putinit(cols, rows, depth);
for (row = 0; row < rows; ++row) {
unsigned int col;
pgm_readpgmrow(ifP, grayrow, cols, maxval, format);
for (col = 0; col < cols; ++col)
putval(grayrow[col]);
for (col = 0; col < padright; ++col)
putval(0);
}
pm_close(ifP);
putrest();
return 0;
}
static void
convertLinear(FILE * const ifP,
unsigned int const cols,
unsigned int const rows,
gray const maxval,
int const format,
const char * const colorNameBlack,
const char * const colorNameWhite,
FILE * const ofP,
gray * const grayrow,
pixel * const pixelrow) {
pixel colorBlack, colorWhite;
pixval red0, grn0, blu0, red1, grn1, blu1;
unsigned int row;
ppm_writeppminit(ofP, cols, rows, maxval, 0);
colorBlack = ppm_parsecolor(colorNameBlack, maxval);
colorWhite = ppm_parsecolor(colorNameWhite, maxval);
red0 = PPM_GETR(colorBlack);
grn0 = PPM_GETG(colorBlack);
blu0 = PPM_GETB(colorBlack);
red1 = PPM_GETR(colorWhite);
grn1 = PPM_GETG(colorWhite);
blu1 = PPM_GETB(colorWhite);
for (row = 0; row < rows; ++row) {
unsigned int col;
pgm_readpgmrow(ifP, grayrow, cols, maxval, format);
for (col = 0; col < cols; ++col) {
gray const input = grayrow[col];
PPM_ASSIGN(
pixelrow[col],
(red0 * (maxval - input) + red1 * input) / maxval,
(grn0 * (maxval - input) + grn1 * input) / maxval,
(blu0 * (maxval - input) + blu1 * input) / maxval);
}
ppm_writeppmrow(ofP, pixelrow, cols, maxval, 0);
}
}
static void
convertWithMap(FILE * const ifP,
unsigned int const cols,
unsigned int const rows,
gray const maxval,
int const format,
const char * const mapFileName,
FILE * const ofP,
gray * const grayrow,
pixel * const pixelrow) {
unsigned int row;
FILE * mapFileP;
int mapcols, maprows;
pixval mapmaxval;
pixel ** mappixels;
unsigned int mapmaxcolor;
mapFileP = pm_openr(mapFileName);
mappixels = ppm_readppm(mapFileP, &mapcols, &maprows, &mapmaxval);
pm_close(mapFileP);
mapmaxcolor = maprows * mapcols - 1;
ppm_writeppminit(ofP, cols, rows, mapmaxval, 0);
for (row = 0; row < rows; ++row) {
unsigned int col;
pgm_readpgmrow(ifP, grayrow, cols, maxval, format);
for (col = 0; col < cols; ++col) {
unsigned int c;
if (maxval == mapmaxcolor)
c = grayrow[col];
else
c = grayrow[col] * mapmaxcolor / maxval;
pixelrow[col] = mappixels[c / mapcols][c % mapcols];
}
ppm_writeppmrow(ofP, pixelrow, cols, mapmaxval, 0);
}
ppm_freearray(mappixels, maprows);
}
int main(int argc, char *argv[]) {
FILE *in = stdin;
FILE *out = stdout;
FILE *sig = NULL;
char output_name[MAXPATHLEN] = "(stdout)";
char input_name[MAXPATHLEN] = "(stdin)";
char signature_name[MAXPATHLEN];
int c;
int row, col;
int n;
double quality = 0.0;
int filter = 0;
int method = -1;
int level = 0;
char filter_name[MAXPATHLEN] = "";
int seed;
int verbose = 0;
gray **image;
Image_tree dwts;
gray maxval;
int rows, cols, colors, format;
progname = argv[0];
pgm_init(&argc, argv);
#ifdef __EMX__
_fsetmode(in, "b");
_fsetmode(out, "b");
#endif
while ((c = getopt(argc, argv, "e:f:F:h?l:o:q:s:v:")) != EOF) {
switch (c) {
case 'e':
method = atoi(optarg);
if (method < 0) {
fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
exit(1);
}
break;
case 'f':
filter = atoi(optarg);
if (filter <= 0) {
fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
exit(1);
}
break;
case 'F':
strcpy(filter_name, optarg);
break;
case 'h':
case '?':
usage();
break;
case 'l':
level = atoi(optarg);
if (level < 1) {
fprintf(stderr, "%s: embedding level out of range\n", progname);
exit(1);
}
break;
case 'o':
if ((out = fopen(optarg, "wb")) == NULL) {
fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
exit(1);
}
strcpy(output_name, optarg);
break;
case 'q':
quality = atoi(optarg);
if (quality <= 0) {
fprintf(stderr, "%s: quality factor %d out of range\n", progname, quality);
exit(1);
}
break;
case 's':
if ((sig = fopen(optarg, "r")) == NULL) {
fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
exit(1);
}
strcpy(signature_name, optarg);
break;
case 'v':
verbose = atoi(optarg);
if (verbose < 0) {
fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
exit(1);
}
break;
}
}
argc -= optind;
argv += optind;
if (argc > 1) {
usage();
exit(1);
}
if (argc == 1 && *argv[0] != '-')
if ((in = fopen(argv[0], "rb")) == NULL) {
fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
exit(1);
}
else
strcpy(input_name, argv[0]);
if (sig) {
char line[32];
fgets(line, sizeof(line), sig);
if (strspn(line, "KDSG") >= 4) {
fscanf(sig, "%d\n", &n);
if (quality == 0.0)
fscanf(sig, "%lf\n", &quality);
else
fscanf(sig, "%*f\n");
if (method < 0)
fscanf(sig, "%d\n", &method);
else
fscanf(sig, "%*d\n");
if (filter == 0)
fscanf(sig, "%d\n", &filter);
else
fscanf(sig, "%*d\n");
if (!strcmp(filter_name, ""))
fscanf(sig, "%[^\n\r]\n", filter_name);
else
fscanf(sig, "%*[^\n\r]\n");
if (level == 0)
fscanf(sig, "%d\n", &level);
else
fscanf(sig, "%*d\n");
fscanf(sig, "%d\n", &seed);
srandom(seed);
n_signature = NBITSTOBYTES(nbit_signature);
fread(signature, sizeof(char), n_signature, sig);
fscanf(sig, "\n");
}
else {
fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
exit(1);
}
fclose(sig);
}
else {
fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
exit(1);
}
pgm_readpgminit(in, &cols, &rows, &maxval, &format);
image = pgm_allocarray(cols, rows);
for (row = 0; row < rows; row++)
pgm_readpgmrow(in, image[row], cols, maxval, format);
fclose(in);
// check watermark dimensions and decomposition level
// decomposition of image
init_dwt(cols, rows, filter_name, filter, level, method);
#ifdef POLLEN_STUFF
{
double alpha, beta;
char *alpha_str = getenv("POLLEN_ALPHA"), *beta_str = getenv("POLLEN_BETA");
if (alpha_str && beta_str) {
alpha = atof(alpha_str);
beta = atof(beta_str);
if (alpha < -M_PI || alpha >= M_PI) {
fprintf(stderr, "%s: pollen - alpha %f out of range\n", progname, alpha);
exit(1);
}
if (beta < -M_PI || beta >= M_PI) {
fprintf(stderr, "%s: pollen - beta %f out of range\n", progname, beta);
exit(1);
}
if (verbose > 7)
fprintf(stderr, "%s: pollen - alpha %f, beta %f\n", progname, alpha, beta);
dwt_pollen_filter(alpha, beta);
}
}
#endif
dwts = fdwt(image);
// create 'image' from binary watermark
// decomposition of watermark
init_dwt(cols, rows, filter_name, filter, 1, method);
// dwts = fdwt(watermark);
// calculate mean value of image and set alpha
// setup of contrast sensitivity matrix
// segment detail images at each level
// calculate DFT of each segment
// compute salience for each segment
// calculate gamma or each detail image
// embed watermark
// reconstruction of watermarked image
idwt(dwts, image);
pgm_writepgminit(out, cols, rows, maxval, 0);
for (row = 0; row < rows; row++)
pgm_writepgmrow(out, image[row], cols, maxval, 0);
fclose(out);
pgm_freearray(image, rows);
exit(0);
}
int
main(int argc,
char * argv[]) {
struct cmdlineInfo cmdline;
FILE * ifP;
int cols, rows;
int median;
enum medianMethod medianMethod;
pgm_init(&argc, argv);
parseCommandLine(argc, argv, &cmdline);
ifP = pm_openr(cmdline.inputFileName);
ccolso2 = cmdline.width / 2;
crowso2 = cmdline.height / 2;
pgm_readpgminit(ifP, &cols, &rows, &maxval, &format);
pgm_writepgminit(stdout, cols, rows, maxval, forceplain);
/* Allocate space for number of rows in mask size. */
grays = pgm_allocarray(cols, cmdline.height);
grayrow = pgm_allocrow(cols);
/* Read in and write out initial rows that won't get changed. */
for (row = 0; row < cmdline.height - 1; ++row) {
pgm_readpgmrow(ifP, grays[row], cols, maxval, format);
/* Write out the unchanged row. */
if (row < crowso2)
pgm_writepgmrow(stdout, grays[row], cols, maxval, forceplain);
}
median = (cmdline.height * cmdline.width) / 2;
/* Choose which sort to run. */
if (cmdline.type == MEDIAN_UNSPECIFIED) {
if ((maxval / ((cmdline.width * cmdline.height) - 1)) < cmdline.cutoff)
medianMethod = HISTOGRAM_SORT_MEDIAN;
else
medianMethod = SELECT_MEDIAN;
} else
medianMethod = cmdline.type;
switch (medianMethod) {
case SELECT_MEDIAN:
selectMedian(ifP, cmdline.width, cmdline.height, cols, rows, median);
break;
case HISTOGRAM_SORT_MEDIAN:
histogramSortMedian(ifP, cmdline.width, cmdline.height,
cols, rows, median);
break;
case MEDIAN_UNSPECIFIED:
pm_error("INTERNAL ERROR: median unspecified");
}
pm_close(ifP);
pm_close(stdout);
pgm_freearray(grays, cmdline.height);
pgm_freerow(grayrow);
return 0;
}
static void
histogramSortMedian(FILE * const ifP,
unsigned int const ccols,
unsigned int const crows,
unsigned int const cols,
unsigned int const rows,
unsigned int const median) {
unsigned int const histmax = maxval + 1;
unsigned int * hist;
unsigned int mdn, ltmdn;
gray * leftCol;
gray * rghtCol;
gray ** rowptr;
MALLOCARRAY(rowptr, crows);
MALLOCARRAY(hist, histmax);
if (rowptr == NULL || hist == NULL)
pm_error("Unable to allocate memory");
leftCol = pgm_allocrow(crows);
rghtCol = pgm_allocrow(crows);
/* Apply median to main part of image. */
for ( ; row < rows; ++row) {
unsigned int col;
unsigned int temprow;
unsigned int rownum;
unsigned int irow;
unsigned int i;
/* initialize hist[] */
for (i = 0; i < histmax; ++i)
hist[i] = 0;
pgm_readpgmrow(ifP, grays[row % crows], cols, maxval, format);
/* Rotate pointers to rows, so rows can be accessed in order. */
temprow = (row + 1) % crows;
rownum = 0;
for (irow = temprow; irow < crows; ++rownum, ++irow)
rowptr[rownum] = grays[irow];
for (irow = 0; irow < temprow; ++rownum, ++irow)
rowptr[rownum] = grays[irow];
for (col = 0; col < cols; ++col) {
if (col < ccolso2 || col >= cols - ccolso2)
grayrow[col] = rowptr[crowso2][col];
else if (col == ccolso2) {
unsigned int crow;
unsigned int const leftcol = col - ccolso2;
i = 0;
for (crow = 0; crow < crows; ++crow) {
unsigned int ccol;
gray * const temprptr = rowptr[crow] + leftcol;
for (ccol = 0; ccol < ccols; ++ccol) {
gray const g = *(temprptr + ccol);
++hist[g];
++i;
}
}
ltmdn = 0;
for (mdn = 0; ltmdn <= median; ++mdn)
ltmdn += hist[mdn];
--mdn;
if (ltmdn > median)
ltmdn -= hist[mdn];
grayrow[col] = mdn;
} else {
unsigned int crow;
unsigned int const subcol = col - (ccolso2 + 1);
unsigned int const addcol = col + ccolso2;
for (crow = 0; crow < crows; ++crow) {
leftCol[crow] = *(rowptr[crow] + subcol);
rghtCol[crow] = *(rowptr[crow] + addcol);
}
for (crow = 0; crow < crows; ++crow) {
{
gray const g = leftCol[crow];
--hist[(unsigned int) g];
if ((unsigned int) g < mdn)
--ltmdn;
}
{
gray const g = rghtCol[crow];
++hist[(unsigned int) g];
if ((unsigned int) g < mdn)
++ltmdn;
}
}
if (ltmdn > median)
do {
--mdn;
ltmdn -= hist[mdn];
} while (ltmdn > median);
else {
/* This one change from Pitas algorithm can reduce run
** time by up to 10%.
*/
while (ltmdn <= median) {
ltmdn += hist[mdn];
++mdn;
}
--mdn;
if (ltmdn > median)
ltmdn -= hist[mdn];
}
grayrow[col] = mdn;
}
}
pgm_writepgmrow(stdout, grayrow, cols, maxval, forceplain);
}
{
/* Write out remaining unchanged rows. */
unsigned int irow;
for (irow = crowso2 + 1; irow < crows; ++irow)
pgm_writepgmrow(stdout, rowptr[irow], cols, maxval, forceplain);
}
pgm_freerow(leftCol);
pgm_freerow(rghtCol);
free(hist);
free(rowptr);
}
static void
selectMedian(FILE * const ifP,
unsigned int const ccols,
unsigned int const crows,
unsigned int const cols,
unsigned int const rows,
unsigned int const median) {
unsigned int const numValues = crows * ccols;
unsigned int col;
gray * garray;
/* Array of the currenty gray values */
int * parray;
int * subcol;
gray ** rowptr;
garray = pgm_allocrow(numValues);
MALLOCARRAY(rowptr, crows);
MALLOCARRAY(parray, numValues);
MALLOCARRAY(subcol, cols);
if (rowptr == NULL || parray == NULL || subcol == NULL)
pm_error("Unable to allocate memory");
for (col = 0; col < cols; ++col)
subcol[col] = (col - (ccolso2 + 1)) % ccols;
/* Apply median to main part of image. */
for ( ; row < rows; ++row) {
int crow;
int rownum, irow, temprow;
unsigned int col;
pgm_readpgmrow(ifP, grays[row % crows], cols, maxval, format);
/* Rotate pointers to rows, so rows can be accessed in order. */
temprow = (row + 1) % crows;
rownum = 0;
for (irow = temprow; irow < crows; ++rownum, ++irow)
rowptr[rownum] = grays[irow];
for (irow = 0; irow < temprow; ++rownum, ++irow)
rowptr[rownum] = grays[irow];
for (col = 0; col < cols; ++col) {
if (col < ccolso2 || col >= cols - ccolso2) {
grayrow[col] = rowptr[crowso2][col];
} else if (col == ccolso2) {
unsigned int const leftcol = col - ccolso2;
unsigned int i;
i = 0;
for (crow = 0; crow < crows; ++crow) {
gray * const temprptr = rowptr[crow] + leftcol;
unsigned int ccol;
for (ccol = 0; ccol < ccols; ++ccol) {
garray[i] = *(temprptr + ccol);
parray[i] = i;
++i;
}
}
select489(garray, parray, numValues, median);
grayrow[col] = garray[parray[median]];
} else {
unsigned int const addcol = col + ccolso2;
unsigned int crow;
unsigned int tsum;
for (crow = 0, tsum = 0; crow < crows; ++crow, tsum += ccols)
garray[tsum + subcol[col]] = *(rowptr[crow] + addcol );
select489( garray, parray, numValues, median );
grayrow[col] = garray[parray[median]];
}
}
pgm_writepgmrow( stdout, grayrow, cols, maxval, forceplain );
}
{
unsigned int irow;
/* Write out remaining unchanged rows. */
for (irow = crowso2 + 1; irow < crows; ++irow)
pgm_writepgmrow(stdout, rowptr[irow], cols, maxval, forceplain);
}
free(subcol);
free(parray);
free(rowptr);
pgm_freerow(garray);
}
static void
histogram_sort_median(FILE * const ifp,
int const ccols,
int const crows,
int const cols,
int const rows,
int const median) {
int const histmax = maxval + 1;
int *hist;
int mdn, ltmdn;
gray *left_col, *right_col;
hist = (int *) pm_allocrow( histmax, sizeof( int ) );
left_col = pgm_allocrow( crows );
right_col = pgm_allocrow( crows );
/* Apply median to main part of image. */
for ( ; row < rows; ++row ) {
int col;
int temprow;
int rownum;
int irow;
int i;
/* initialize hist[] */
for ( i = 0; i < histmax; ++i )
hist[i] = 0;
temprow = row % crows;
pgm_readpgmrow( ifp, grays[temprow], cols, maxval, format );
/* Rotate pointers to rows, so rows can be accessed in order. */
temprow = ( row + 1 ) % crows;
rownum = 0;
for ( irow = temprow; irow < crows; ++rownum, ++irow )
rowptr[rownum] = grays[irow];
for ( irow = 0; irow < temprow; ++rownum, ++irow )
rowptr[rownum] = grays[irow];
for ( col = 0; col < cols; ++col ) {
if ( col < ccolso2 || col >= cols - ccolso2 )
grayrow[col] = rowptr[crowso2][col];
else if ( col == ccolso2 ) {
int crow;
int const leftcol = col - ccolso2;
i = 0;
for ( crow = 0; crow < crows; ++crow ) {
int ccol;
gray * const temprptr = rowptr[crow] + leftcol;
for ( ccol = 0; ccol < ccols; ++ccol ) {
gray const g = *( temprptr + ccol );
++hist[g];
++i;
}
}
ltmdn = 0;
for ( mdn = 0; ltmdn <= median; ++mdn )
ltmdn += hist[mdn];
mdn--;
if ( ltmdn > median )
ltmdn -= hist[mdn];
grayrow[col] = mdn;
} else {
int crow;
int const subcol = col - ( ccolso2 + 1 );
int const addcol = col + ccolso2;
for ( crow = 0; crow < crows; ++crow ) {
left_col[crow] = *( rowptr[crow] + subcol );
right_col[crow] = *( rowptr[crow] + addcol );
}
for ( crow = 0; crow < crows; ++crow ) {
{
gray const g = left_col[crow];
hist[(int) g]--;
if ( (int) g < mdn )
ltmdn--;
}
{
gray const g = right_col[crow];
hist[(int) g]++;
if ( (int) g < mdn )
ltmdn++;
}
}
if ( ltmdn > median )
do {
mdn--;
ltmdn -= hist[mdn];
} while ( ltmdn > median );
else {
/* This one change from Pitas algorithm can reduce run
** time by up to 10%.
*/
while ( ltmdn <= median ) {
ltmdn += hist[mdn];
mdn++;
}
mdn--;
if ( ltmdn > median )
ltmdn -= hist[mdn];
}
grayrow[col] = mdn;
}
}
pgm_writepgmrow( stdout, grayrow, cols, maxval, forceplain );
}
{
/* Write out remaining unchanged rows. */
int irow;
for ( irow = crowso2 + 1; irow < crows; ++irow )
pgm_writepgmrow( stdout, rowptr[irow], cols, maxval, forceplain );
}
pm_freerow( (char *) hist );
pgm_freerow( left_col );
pgm_freerow( right_col );
}
static void
select_median(FILE * const ifp,
int const ccols,
int const crows,
int const cols,
int const rows,
int const median) {
int ccol, col;
int crow;
int rownum, irow, temprow;
gray *temprptr;
int i, leftcol;
int num_values;
gray *garray;
int *parray;
int addcol;
int *subcol;
int tsum;
/* Allocate storage for array of the current gray values. */
garray = pgm_allocrow( crows * ccols );
num_values = crows * ccols;
parray = (int *) pm_allocrow( crows * ccols, sizeof(int) );
subcol = (int *) pm_allocrow( cols, sizeof(int) );
for ( i = 0; i < cols; ++i )
subcol[i] = ( i - (ccolso2 + 1) ) % ccols;
/* Apply median to main part of image. */
for ( ; row < rows; ++row ) {
temprow = row % crows;
pgm_readpgmrow( ifp, grays[temprow], cols, maxval, format );
/* Rotate pointers to rows, so rows can be accessed in order. */
temprow = ( row + 1 ) % crows;
rownum = 0;
for ( irow = temprow; irow < crows; ++rownum, ++irow )
rowptr[rownum] = grays[irow];
for ( irow = 0; irow < temprow; ++rownum, ++irow )
rowptr[rownum] = grays[irow];
for ( col = 0; col < cols; ++col ) {
if ( col < ccolso2 || col >= cols - ccolso2 ) {
grayrow[col] = rowptr[crowso2][col];
} else if ( col == ccolso2 ) {
leftcol = col - ccolso2;
i = 0;
for ( crow = 0; crow < crows; ++crow ) {
temprptr = rowptr[crow] + leftcol;
for ( ccol = 0; ccol < ccols; ++ccol ) {
garray[i] = *( temprptr + ccol );
parray[i] = i;
++i;
}
}
select_489( garray, parray, num_values, median );
grayrow[col] = garray[parray[median]];
} else {
addcol = col + ccolso2;
for (crow = 0, tsum = 0; crow < crows; ++crow, tsum += ccols)
garray[tsum + subcol[col]] = *(rowptr[crow] + addcol );
select_489( garray, parray, num_values, median );
grayrow[col] = garray[parray[median]];
}
}
pgm_writepgmrow( stdout, grayrow, cols, maxval, forceplain );
}
/* Write out remaining unchanged rows. */
for ( irow = crowso2 + 1; irow < crows; ++irow )
pgm_writepgmrow( stdout, rowptr[irow], cols, maxval, forceplain );
pgm_freerow( garray );
pm_freerow( (char *) parray );
pm_freerow( (char *) subcol );
}
COSTTYPE *
readPGM(const char *fname, int *width, int *height, bool raw)
{
pm_init("navfn_tests",0);
FILE *pgmfile;
pgmfile = fopen(fname,"r");
if (!pgmfile)
{
printf("readPGM() Can't find file %s\n", fname);
return NULL;
}
printf("readPGM() Reading costmap file %s\n", fname);
int ncols, nrows;
gray maxval;
int format;
pgm_readpgminit(pgmfile, &ncols, &nrows, &maxval, &format);
printf("readPGM() Size: %d x %d\n", ncols, nrows);
// set up cost map
COSTTYPE *cmap = (COSTTYPE *)malloc(ncols*nrows*sizeof(COSTTYPE));
if (!raw)
for (int i=0; i<ncols*nrows; i++)
cmap[i] = COST_NEUTRAL;
gray * row(pgm_allocrow(ncols));
int otot = 0;
int utot = 0;
int ftot = 0;
for (int ii = 0; ii < nrows; ii++) {
pgm_readpgmrow(pgmfile, row, ncols, maxval, format);
if (raw) // raw costmap from ROS
{
for (int jj(ncols - 1); jj >= 0; --jj)
{
int v = row[jj];
cmap[ii*ncols+jj] = v;
if (v >= COST_OBS_ROS)
otot++;
if (v == 0)
ftot++;
}
}
else
{
ftot = ncols*nrows;
for (int jj(ncols - 1); jj >= 0; --jj)
{
if (row[jj] < unknown_gray && ii < nrows-7 && ii > 7)
{
setcostobs(cmap,ii*ncols+jj,ncols);
otot++;
ftot--;
}
else if (row[jj] <= unknown_gray)
{
setcostunk(cmap,ii*ncols+jj,ncols);
utot++;
ftot--;
}
}
}
}
printf("readPGM() Found %d obstacle cells, %d free cells, %d unknown cells\n", otot, ftot, utot);
pgm_freerow(row);
*width = ncols;
*height = nrows;
return cmap;
}
int main(int argc, char *argv[])
{
FILE *ifd;
FILE *ofd;
int rows, cols;
xelval maxval;
int format;
const char * const usage = "[-resolution x y] [pnmfile [ddiffile]]";
int i, j;
char *outfile;
int argn;
int hor_resolution = 75;
int ver_resolution = 75;
imageparams ip;
unsigned char *data, *p;
pnm_init(&argc, argv);
for (argn = 1;argn < argc && argv[argn][0] == '-';argn++) {
int arglen = strlen(argv[argn]);
if (!strncmp (argv[argn],"-resolution", arglen)) {
if (argn + 2 < argc) {
hor_resolution = atoi(argv[argn+1]);
ver_resolution = atoi(argv[argn+2]);
argn += 2;
continue;
} else {
pm_usage(usage);
}
} else {
pm_usage(usage);
}
}
if (hor_resolution <= 0 || ver_resolution <= 0) {
fprintf(stderr,"Unreasonable resolution values: %d x %d\n",
hor_resolution,ver_resolution);
exit(1);
}
if (argn == argc - 2) {
ifd = pm_openr(argv[argn]);
outfile = argv[argn+1];
if (!(ofd = fopen(outfile,"wb"))) {
perror(outfile);
exit(1);
}
} else if (argn == argc - 1) {
ifd = pm_openr(argv[argn]);
ofd = stdout;
} else {
ifd = stdin;
ofd = stdout;
}
pnm_readpnminit(ifd, &cols, &rows, &maxval, &format);
ip.width = cols;
ip.height = rows;
ip.h_res = hor_resolution;
ip.v_res = ver_resolution;
switch (PNM_FORMAT_TYPE(format)) {
case PBM_TYPE:
ip.bits_per_pixel = 1;
ip.bytes_per_line = (cols + 7) / 8;
ip.spectral = 2;
ip.components = 1;
ip.bits_per_component = 1;
ip.polarity = 1;
break;
case PGM_TYPE:
ip.bytes_per_line = cols;
ip.bits_per_pixel = 8;
ip.spectral = 2;
ip.components = 1;
ip.bits_per_component = 8;
ip.polarity = 2;
break;
case PPM_TYPE:
ip.bytes_per_line = 3 * cols;
ip.bits_per_pixel = 24;
ip.spectral = 5;
ip.components = 3;
ip.bits_per_component = 8;
ip.polarity = 2;
break;
default:
fprintf(stderr, "Unrecognized PBMPLUS format %d\n", format);
exit(1);
}
if (!write_header(ofd,&ip)) {
perror("Writing header");
exit(1);
}
if (!(p = data = (unsigned char*) malloc(ip.bytes_per_line))) {
perror("allocating line buffer");
exit(1);
}
switch (PNM_FORMAT_TYPE(format)) {
case PBM_TYPE:
{
bit *pixels;
int mask;
int k;
pixels = pbm_allocrow(cols);
for (i = 0; i < rows; i++) {
pbm_readpbmrow(ifd, pixels, cols, format);
mask = 0;
p = data;
for (j = 0, k = 0; j < cols; j++) {
if (pixels[j] == PBM_BLACK) {
mask |= 1 << k;
}
if (k == 7) {
*p++ = mask;
mask = 0;
k = 0;
} else {
k++;
}
}
if (k != 7) { /* Flush the rest of the column */
*p = mask;
}
if (fwrite(data,1,ip.bytes_per_line,ofd) != ip.bytes_per_line) {
perror("Writing image data\n");
exit(1);
}
}
}
break;
case PGM_TYPE:
{
gray *pixels = pgm_allocrow(cols);
for (i = 0; i < rows; i++) {
p = data;
pgm_readpgmrow(ifd, pixels, cols, maxval, format);
for (j = 0; j < cols; j++) {
*p++ = (unsigned char) pixels[j];
}
if (fwrite(data,1,ip.bytes_per_line,ofd) != ip.bytes_per_line) {
perror("Writing image data\n");
exit(1);
}
}
pgm_freerow(pixels);
}
break;
case PPM_TYPE:
{
pixel *pixels = ppm_allocrow(cols);
for (i = 0; i < rows; i++) {
p = data;
ppm_readppmrow(ifd, pixels, cols, maxval, format);
for (j = 0; j < cols; j++) {
*p++ = PPM_GETR(pixels[j]);
*p++ = PPM_GETG(pixels[j]);
*p++ = PPM_GETB(pixels[j]);
}
if (fwrite(data,1,ip.bytes_per_line,ofd) != ip.bytes_per_line) {
perror("Writing image data\n");
exit(1);
}
}
ppm_freerow(pixels);
}
break;
}
pm_close(ifd);
free(data);
if (!write_trailer(ofd)) {
perror("Writing trailer");
exit(1);
}
if (fclose(ofd) == EOF) {
perror("Closing output file");
exit(1);
};
return(0);
}
int main(int argc, char *argv[]) {
FILE *in = stdin;
FILE *out = stdout;
FILE *orig = NULL;
FILE *sig = NULL;
gray **input_image;
gray **orig_image;
char signature_name[MAXPATHLEN];
char output_name[MAXPATHLEN] = "(stdout)";
char input_name[MAXPATHLEN] = "(stdin)";
char orig_name[MAXPATHLEN];
int c;
int n = 0;
int method = -1;
int filter = 0;
char filter_name[MAXPATHLEN] = "";
int level = 0;
double alpha = 0.0;
int in_rows, in_cols, in_format;
gray in_maxval;
int orig_rows, orig_cols, orig_format;
gray orig_maxval;
int rows, cols;
int row, col;
Image_tree input_dwts;
Image_tree orig_dwts;
int verbose = 0;
progname = argv[0];
pgm_init(&argc, argv); wm_init2();
while ((c = getopt(argc, argv, "a:e:f:F:h?i:n:o:s:v:")) != EOF) {
switch (c) {
case 'a':
alpha = atof(optarg);
if (alpha <= 0.0) {
fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
exit(1);
}
break;
case 'e':
method = atoi(optarg);
if (method < 0) {
fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
exit(1);
}
break;
case 'f':
filter = atoi(optarg);
if (filter <= 0) {
fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
exit(1);
}
break;
case 'F':
strcpy(filter_name, optarg);
break;
case 'h':
case '?':
usage();
break;
case 'i':
if ((orig = fopen(optarg, "rb")) == NULL) {
fprintf(stderr, "%s: unable to open original image file %s\n", progname, optarg);
exit(1);
}
strcpy(orig_name, optarg);
break;
case 'n':
n = atoi(optarg);
if (n < 1 || n > 1000) {
fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
exit(1);
}
break;
case 'o':
if ((out = fopen(optarg, "w")) == NULL) {
fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
exit(1);
}
strcpy(output_name, optarg);
break;
case 's':
if ((sig = fopen(optarg, "r")) == NULL) {
fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
exit(1);
}
strcpy(signature_name, optarg);
break;
case 'v':
verbose = atoi(optarg);
if (verbose < 0) {
fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
exit(1);
}
break;
}
}
argc -= optind;
argv += optind;
if (argc > 1) {
usage();
exit(1);
}
if (argc == 1 && *argv[0] != '-') {
if ((in = fopen(argv[0], "rb")) == NULL) {
fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
exit(1);
}
else
strcpy(input_name, argv[0]);
}
if (!orig) {
fprintf(stderr, "%s: original image file not specified, use -i file option\n", progname);
exit(1);
}
if (sig) {
char line[32];
fgets(line, sizeof(line), sig);
if (strspn(line, "CVSG") >= 4) {
fscanf(sig, "%d\n", &n);
if (alpha == 0.0)
fscanf(sig, "%lf\n", &alpha);
else
fscanf(sig, "%*f\n");
if (method < 0)
fscanf(sig, "%d\n", &method);
else
fscanf(sig, "%*d\n");
if (filter == 0)
fscanf(sig, "%d\n", &filter);
else
fscanf(sig, "%*d\n");
if (!strcmp(filter_name, ""))
fscanf(sig, "%[^\n\r]\n", filter_name);
else
fscanf(sig, "%*[^\n\r]\n");
}
else {
fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
exit(1);
}
fclose(sig);
}
else {
fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
exit(1);
}
pgm_readpgminit(in, &in_cols, &in_rows, &in_maxval, &in_format);
pgm_readpgminit(orig, &orig_cols, &orig_rows, &orig_maxval, &orig_format);
if (in_cols != orig_cols || in_rows != orig_rows) {
fprintf(stderr, "%s: input image %s does not match dimensions of original image %s\n", progname, input_name, orig_name);
exit(1);
}
cols = in_cols;
rows = in_rows;
input_image = pgm_allocarray(in_cols, in_rows);
orig_image = pgm_allocarray(orig_cols, orig_rows);
for (row = 0; row < in_rows; row++)
pgm_readpgmrow(in, input_image[row], in_cols, in_maxval, in_format);
fclose(in);
for (row = 0; row < orig_rows; row++)
pgm_readpgmrow(orig, orig_image[row], orig_cols, orig_maxval, orig_format);
fclose(orig);
level = 0;
row = rows;
col = cols;
while (n < row * col / 4.0 && row >= 2 && col >= 2) {
row /= 2;
col /= 2;
level++;
}
if (verbose >= 2) {
fprintf(stderr, "%s: extracting from coarse image (x %d/y %d) at level %d\n", progname, col, row, level);
}
init_dwt(cols, rows, filter_name, filter, level, method);
#ifdef POLLEN_STUFF
#include "pollen_stuff.c"
#endif
#ifdef PARAM_STUFF
#include "param_stuff.c"
#endif
input_dwts = fdwt(input_image);
orig_dwts = fdwt(orig_image);
fprintf(out, "CVWM\n");
fprintf(out, "%d\n", n);
{
Image_tree p = input_dwts;
Image_tree q = orig_dwts;
Image input_img;
Image orig_img;
double input_med;
double orig_med;
double input_var;
double orig_var;
while (!p->image)
p = p->coarse;
while (!q->image)
q = q->coarse;
input_img = p->image;
orig_img = q->image;
input_med = 0.0;
for (row = 0; row < input_img->height; row++)
for (col = 0; col < input_img->width; col++)
input_med += get_pixel(input_img, col, row);
input_med /= (double) (input_img->height * input_img->width);
orig_med = 0.0;
for (row = 0; row < orig_img->height; row++)
for (col = 0; col < orig_img->width; col++)
orig_med += get_pixel(orig_img, col, row);
orig_med /= (double) (orig_img->height * orig_img->width);
orig_var = 0.0;
for (row = 0; row < orig_img->height; row++)
for (col = 0; col < orig_img->width; col++)
orig_var += sqr(get_pixel(orig_img, col, row) - orig_med);
orig_var /= (double) (orig_img->height * orig_img->width);
input_var = 0.0;
for (row = 0; row < input_img->height; row++)
for (col = 0; col < input_img->width; col++)
input_var += sqr(get_pixel(input_img, col, row) - input_med);
input_var /= (double) (input_img->height * input_img->width);
orig_var = sqrt(orig_var);
input_var = sqrt(input_var);
if (verbose > 3)
fprintf(stderr, "%s: mean (input, orig): %f, %f,\n variance (input, orig): %f, %f\n", progname, input_med, orig_med, input_var, orig_var);
row = 0;
col = 0;
while (n > 0) {
double input_pix;
double orig_pix;
double x;
input_pix = get_pixel(input_img, col, row);
orig_pix = get_pixel(orig_img, col, row);
x = (((input_pix - input_med) * (orig_var / input_var) - (orig_pix / orig_med)) / (orig_pix - orig_med) - 1.0) / alpha;
fprintf(out, "%f\n", x);
if (++col == orig_img->width) { col = 0; row++; }
n--;
}
}
fclose(out);
pgm_freearray(input_image, rows);
pgm_freearray(orig_image, rows);
exit(0);
}
int main(int argc, char *argv[]) {
FILE *in = stdin;
FILE *out = stdout;
FILE *sig = NULL;
char output_name[MAXPATHLEN] = "(stdout)";
char input_name[MAXPATHLEN] = "(stdin)";
char signature_name[MAXPATHLEN];
int i, c, w;
int row;
int n;
double alpha = 0.0;
double beta = 0.0;
int filter = 0;
int method = -1;
int level = 0;
char filter_name[MAXPATHLEN] = "";
int verbose = 0;
gray **image;
Image_tree dwts;
gray maxval;
int rows, cols, format;
double *watermark;
progname = argv[0];
pgm_init(&argc, argv); wm_init();
while ((c = getopt(argc, argv, "a:b:e:f:F:h?o:s:v:")) != EOF) {
switch (c) {
case 'a':
alpha = atof(optarg);
if (alpha <= 0.0) {
fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
exit(1);
}
break;
case 'b':
beta = atof(optarg);
if (beta <= 0.0) {
fprintf(stderr, "%s: beta factor %f out of range\n", progname, beta);
exit(1);
}
break;
case 'e':
method = atoi(optarg);
if (method < 0) {
fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
exit(1);
}
break;
case 'f':
filter = atoi(optarg);
if (filter <= 0) {
fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
exit(1);
}
break;
case 'F':
strcpy(filter_name, optarg);
break;
case 'h':
case '?':
usage();
break;
case 'o':
if ((out = fopen(optarg, "wb")) == NULL) {
fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
exit(1);
}
strcpy(output_name, optarg);
break;
case 's':
if ((sig = fopen(optarg, "r")) == NULL) {
fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
exit(1);
}
strcpy(signature_name, optarg);
break;
case 'v':
verbose = atoi(optarg);
if (verbose < 0) {
fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
exit(1);
}
break;
}
}
argc -= optind;
argv += optind;
if (argc > 1) {
usage();
exit(1);
}
if (argc == 1 && *argv[0] != '-') {
if ((in = fopen(argv[0], "rb")) == NULL) {
fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
exit(1);
}
else
strcpy(input_name, argv[0]);
}
if (sig) {
char line[32];
fgets(line, sizeof(line), sig);
if (strspn(line, "WGSG") >= 4) {
fscanf(sig, "%d\n", &n);
if (alpha == 0.0)
fscanf(sig, "%lf\n", &alpha);
else
fscanf(sig, "%*f\n");
if (beta == 0.0)
fscanf(sig, "%lf\n", &beta);
else
fscanf(sig, "%*f\n");
if (method < 0)
fscanf(sig, "%d\n", &method);
else
fscanf(sig, "%*d\n");
if (filter == 0)
fscanf(sig, "%d\n", &filter);
else
fscanf(sig, "%*d\n");
if (!strcmp(filter_name, ""))
fscanf(sig, "%[^\n\r]\n", filter_name);
else
fscanf(sig, "%*[^\n\r]\n");
}
else {
fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
exit(1);
}
}
else {
fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
exit(1);
}
watermark = malloc(n * sizeof(double));
for (i = 0; i < n; i++)
fscanf(sig, "%lf\n", &watermark[i]);
fclose(sig);
pgm_readpgminit(in, &cols, &rows, &maxval, &format);
image = pgm_allocarray(cols, rows);
for (row = 0; row < rows; row++)
pgm_readpgmrow(in, image[row], cols, maxval, format);
fclose(in);
// complete decomposition
level = find_deepest_level(cols, rows) - 1;
// wavelet transform
init_dwt(cols, rows, filter_name, filter, level, method);
#ifdef POLLEN_STUFF
#include "pollen_stuff.c"
#endif
#ifdef PARAM_STUFF
#include "param_stuff.c"
#endif
dwts = fdwt(image);
// build tree for subband selection, calculate subband thresholds
init_subbands(dwts);
set_subbands_type_beta(HORIZONTAL, beta);
set_subbands_type_beta(VERTICAL, beta);
calc_subbands_threshold();
w = 0;
while (w < n) {
Subband_data s;
// select subband with max. threshold
s = select_subband();
if (verbose > 1)
fprintf(stderr, "%s: selected subband %s%d, T=%lf, beta=%lf\n", progname, subband_name(s->type), s->level, s->T, s->beta);
// watermark significant coefficients and set them selected
// check is entire signature has been embedded
c = select_subband_coeff(s);
do {
double p;
if (c < 0)
// no more significant coefficients in subband
break;
p = get_subband_coeff(s, c);
if (p < s->Cmax) {
if (verbose > 2)
fprintf(stderr, "%s: embedding sig. coeff. #%d (= %lf)\n into %s%d coeff. #%d\n",
progname, w, watermark[w], subband_name(s->type), s->level, c);
p = p + alpha * s->beta * s->T * watermark[w];
set_subband_coeff(s, c, p);
w++;
}
mark_subband_coeff(s, c);
// select next significant coefficient
c = select_subband_coeff_from(s, c);
} while (w < n);
// update subband threshold
s->T /= 2.0;
}
free_subbands();
free(watermark);
idwt(dwts, image);
pgm_writepgminit(out, cols, rows, maxval, 0);
for (row = 0; row < rows; row++)
pgm_writepgmrow(out, image[row], cols, maxval, 0);
fclose(out);
pgm_freearray(image, rows);
exit(0);
}
static void
pgmHist(FILE * const ifP,
int const cols,
int const rows,
xelval const maxval,
int const format,
bool const dots,
bool const no_white,
bool const no_black,
bool const verbose,
xelval const startval,
xelval const endval,
unsigned int const histWidth,
unsigned int const histHeight,
bool const clipSpec,
unsigned int const clipCount) {
gray * grayrow;
bit ** bits;
int i, j;
unsigned int * ghist;
double vscale;
unsigned int hmax;
MALLOCARRAY(ghist, histWidth);
if (ghist == NULL)
pm_error("Not enough memory for histogram array (%u bytes)",
histWidth * (unsigned)sizeof(int));
bits = pbm_allocarray(histWidth, histHeight);
if (bits == NULL)
pm_error("no space for output array (%u bits)",
histWidth * histHeight);
memset(ghist, 0, histWidth * sizeof(ghist[0]));
/* read the pixel values into the histogram arrays */
grayrow = pgm_allocrow(cols);
if (verbose)
pm_message("making histogram...");
for (i = rows; i > 0; --i) {
pgm_readpgmrow (ifP, grayrow, cols, maxval, format);
for (j = cols-1; j >= 0; --j)
countComp(grayrow[j], startval, endval, histWidth, ghist);
}
pgm_freerow(grayrow);
/* find the highest-valued slot and set the vertical scale value */
if (verbose)
pm_message("finding max. slot height...");
if (clipSpec)
hmax = clipCount;
else
hmax = maxSlotCount(ghist, histWidth, no_white, no_black);
assert(hmax > 0);
if (verbose)
pm_message("Done: height = %u", hmax);
clipHistogram(ghist, histWidth, hmax);
vscale = (double) histHeight / hmax;
for (i = 0; i < histWidth; ++i) {
int mark = histHeight - (int)(vscale * ghist[i]);
for (j = 0; j < mark; ++j)
bits[j][i] = PBM_BLACK;
if (j < histHeight)
bits[j++][i] = PBM_WHITE;
for ( ; j < histHeight; ++j)
bits[j][i] = dots ? PBM_BLACK : PBM_WHITE;
}
pbm_writepbm(stdout, bits, histWidth, histHeight, 0);
}
int main( int argc, char** argv ){
FILE *ifp;
gray maxval;
int cols, rows, format;
gray* prevrow;
gray* thisrow;
gray* tmprow;
int* countTile;
int* countEdgeX;
int* countEdgeY;
int* countVertex;
int i, col, row;
int maxtiles, maxedgex, maxedgey, maxvertex;
int area, perimeter, eulerchi;
double l2inv, linv;
/*
* parse arg and initialize
*/
pgm_init( &argc, argv );
if ( argc > 2 ) pm_usage( "[pgmfile]" );
if ( argc == 2 )
ifp = pm_openr( argv[1] );
else
ifp = stdin;
/*
* initialize
*/
pgm_readpgminit( ifp, &cols, &rows, &maxval, &format );
prevrow = pgm_allocrow( cols );
thisrow = pgm_allocrow( cols );
MALLOCARRAY(countTile , maxval + 1 );
MALLOCARRAY(countEdgeX , maxval + 1 );
MALLOCARRAY(countEdgeY , maxval + 1 );
MALLOCARRAY(countVertex , maxval + 1 );
if (countTile == NULL || countEdgeX == NULL || countEdgeY == NULL ||
countVertex == NULL)
pm_error( "out of memory" );
for ( i = 0; i <= maxval; i++ ) countTile[i] = 0;
for ( i = 0; i <= maxval; i++ ) countEdgeX[i] = 0;
for ( i = 0; i <= maxval; i++ ) countEdgeY[i] = 0;
for ( i = 0; i <= maxval; i++ ) countVertex[i] = 0;
/* first row */
pgm_readpgmrow( ifp, thisrow, cols, maxval, format );
/* tiles */
for ( col = 0; col < cols; ++col ) ++countTile[thisrow[col]];
/* y-edges */
for ( col = 0; col < cols; ++col ) ++countEdgeY[thisrow[col]];
/* x-edges */
++countEdgeX[thisrow[0]];
for ( col = 0; col < cols-1; ++col )
++countEdgeX[ MAX2(thisrow[col], thisrow[col+1]) ];
++countEdgeX[thisrow[cols-1]];
/* shortcut: for the first row, countVertex == countEdgeX */
++countVertex[thisrow[0]];
for ( col = 0; col < cols-1; ++col )
++countVertex[ MAX2(thisrow[col], thisrow[col+1]) ];
++countVertex[thisrow[cols-1]];
for ( row = 1; row < rows; ++row ){
tmprow = prevrow;
prevrow = thisrow;
thisrow = tmprow;
pgm_readpgmrow( ifp, thisrow, cols, maxval, format );
/* tiles */
for ( col = 0; col < cols; ++col ) ++countTile[thisrow[col]];
/* y-edges */
for ( col = 0; col < cols; ++col )
++countEdgeY[ MAX2(thisrow[col], prevrow[col]) ];
/* x-edges */
++countEdgeX[thisrow[0]];
for ( col = 0; col < cols-1; ++col )
++countEdgeX[ MAX2(thisrow[col], thisrow[col+1]) ];
++countEdgeX[thisrow[cols-1]];
/* vertices */
++countVertex[ MAX2(thisrow[0],prevrow[0]) ];
for ( col = 0; col < cols-1; ++col )
++countVertex[
MAX4(thisrow[col], thisrow[col+1], prevrow[col], prevrow[col+1])
];
++countVertex[ MAX2(thisrow[cols-1],prevrow[cols-1]) ];
} /* for row */
/* now thisrow contains the top row*/
/* tiles and x-edges have been counted, now upper
y-edges and top vertices remain */
/* y-edges */
for ( col = 0; col < cols; ++col ) ++countEdgeY[ thisrow[col] ];
/* vertices */
++countVertex[thisrow[0]];
for ( col = 0; col < cols-1; ++col )
++countVertex[ MAX2(thisrow[col],thisrow[col+1]) ];
++countVertex[ thisrow[cols-1] ];
/* cleanup */
maxtiles = rows * cols;
maxedgex = rows * (cols+1);
maxedgey = (rows+1) * cols;
maxvertex= (rows+1) * (cols+1);
l2inv = 1.0/maxtiles;
linv = 0.5/(rows+cols);
/* And print it. */
printf( "#threshold\t tiles\tx-edges\ty-edges\tvertices\n" );
printf( "#---------\t -----\t-------\t-------\t--------\n" );
for ( i = 0; i <= maxval; i++ ){
if( !(countTile[i] || countEdgeX[i] || countEdgeY[i] || countVertex[i] ) )
continue; /* skip empty slots */
area = maxtiles;
perimeter = 2*maxedgex + 2*maxedgey - 4*maxtiles;
eulerchi = maxtiles - maxedgex - maxedgey + maxvertex;
printf( "%f\t%6d\t%7d\t%7d\t%8d\t%g\t%g\t%6d\n", (float) i/(1.0*maxval),
maxtiles, maxedgex, maxedgey, maxvertex,
area*l2inv, perimeter*linv, eulerchi
);
maxtiles -= countTile[i];
maxedgex -= countEdgeX[i];
maxedgey -= countEdgeY[i];
maxvertex-= countVertex[i];
/* i, countTile[i], countEdgeX[i], countEdgeY[i], countVertex[i] */
}
/* these should be zero: */
printf( "# check:\t%6d\t%7d\t%7d\t%8d\n",
maxtiles, maxedgex, maxedgey, maxvertex );
pm_close( ifp );
exit( 0 );
} /*main*/
