/* Function 'readComplexSubset' returning a subset of image. This is the version
of 'readSubset' that handles complex data.
*/
void readComplexSubset(char *fileName, int width, int height, int posX, int posY,
complexFloat *subset)
{
FILE *fp;
int ii, kk;
complexFloat *buffer;
meta_parameters *meta = meta_read(fileName);
int lines = meta->general->line_count;
int samples = meta->general->sample_count;
/* Check whether input parameters are feasible */
assert (width > 0);
assert (height > 0);
assert (width < lines);
assert (height < samples);
assert (posX > 0);
assert (posY > 0);
assert ((posX+width) < samples);
assert ((posY+height) < lines);
if (meta->general->data_type < 6)
printErr(" ERROR: 'readcomplexSubset' does only work on complex data!\n");
/* Allocate memory for buffers */
buffer = (complexFloat *) MALLOC(height*samples*sizeof(complexFloat));
/* Open image file */
fp = FOPEN(fileName, "rb");
/* Read the appropriate data chunk */
get_complexFloat_lines(fp, meta, posY, height, buffer);
/* Fill in the subset buffer */
for (ii=0; ii<height; ii++)
for (kk=0; kk<width; kk++)
subset[ii*width+kk] = buffer[ii*samples+posX+kk];
/* Clean up */
FCLOSE(fp);
FREE(buffer);
meta_free(meta);
}
int main(int argc,char **argv)
{
int lines,samps; /* Number of image lines and samples */
int fftLen,start_line; /* FFT length, & line to start processing at*/
int x,y,i,k; /* Counters */
int f_lo1,f_lo2,f_hi1,f_hi2; /* Filter frequency indicies */
int chunk_size,chunk_int; /* Size of current datablock, & temp value*/
int last_chunk; /* Size of the last chunk */
int compensate_for_last_chunk=1; /* If last chunk = 0 dont loop for last chunk*/
char *inName, *parmName, *outName; /* Input filename */
float filtStart[2], filtEnd[2]; /* Filter start and stop variables */
float df, stop; /* Delta and counter variables */
complexFloat *inBuf,*outBuf; /* Input/Output Image Buffers */
complexFloat *fftBuf; /* FFT Buffer for the image */
float *ampBuf,*phsBuf; /* Amplitude and Phase Buffers */
float *time_vector,A,B,shift; /* Time vector, & freq modulation shift vars*/
float chunk_float; /* Temporary value */
FILE *inF, *freqF, *outF1; /* Input and Output file pointers */
float cur_time, f_s; /* Current time to increment the time vector by */
meta_parameters *inMeta, *outMeta; /* Meta info about the images */
/* Usage is shown if the user doesn't give 3 arguements */
if(argc!=4) { usage(argv[0]); }
StartWatch();
printf("Program cpx_filter\n");
/* Get the filename and filter start and end frequencies from the command line*/
inName=argv[1];
if(findExt(inName)==NULL)
inName = appendExt(argv[1],".cpx");
outName=argv[2];
parmName=argv[3];
/* Get input metadata. Make sure data_type is complex */
inMeta = meta_read(inName);
if (inMeta->general->data_type < COMPLEX_BYTE) {
switch (inMeta->general->data_type) {
case ASF_BYTE: inMeta->general->data_type=COMPLEX_BYTE; break;
case INTEGER16: inMeta->general->data_type=COMPLEX_INTEGER16; break;
case INTEGER32: inMeta->general->data_type=COMPLEX_INTEGER32; break;
case REAL32: inMeta->general->data_type=COMPLEX_REAL32; break;
case REAL64: inMeta->general->data_type=COMPLEX_REAL64; break;
}
meta_write (inMeta, inName);
}
/* Open the frequency parameter file and read the parameters */
if((freqF=FOPEN(parmName,"r"))==NULL) {
printf("Frequency Parameter File %s could not be Opened!\n",parmName);
exit(EXIT_FAILURE);
}
fscanf(freqF,"%f\n",&f_s);
fscanf(freqF,"%f\n",&shift);
fscanf(freqF,"%f %f\n", &filtStart[0], &filtEnd[0]);
fscanf(freqF,"%f %f\n", &filtStart[1], &filtEnd[1]);
printf("\n");
printf("Input file is %s\n",inName);
printf("Output file is %s.cpx\n",outName);
printf("Parameter file is %s\n",parmName);
printf("Filtering from frequencies %.2f to %.2f Hz and %.2f to %.2f in Azimuth\n",filtStart[0],filtEnd[0],filtStart[1],filtEnd[1]);
printf("The sampling frequency is %f Hz\n",f_s);
printf("Shifting the spectrum by %.2f Hz\n",shift);
/* Get the number of lines and samples from the input meta file */
lines = inMeta->general->line_count;
samps = inMeta->general->sample_count;
chunk_size = BLOCK_SIZE;
chunk_float = (float)lines/chunk_size;
chunk_int = lines/chunk_size;
last_chunk = (int)((chunk_float-(float)chunk_int) * (float)BLOCK_SIZE + 0.5);
if( (2*TOSS_SIZE) > last_chunk)
compensate_for_last_chunk=0;
printf("Chunk Size is set to %d, the last chunk is %d lines\n",
chunk_size, last_chunk);
/* Compute the FFT length based on the number of lines. Must be a power of 2 */
i = (log10(chunk_size)/log10(2)) + 1;
fftLen = pow(2,i);
printf("FFT Length is %d\n",fftLen);
cfft1d(fftLen,NULL,0);
printf("The Input Image has %d lines and %d samples\n",lines,samps);
/* Allocate the memory for all the buffers */
inBuf = (complexFloat *)MALLOC(sizeof(complexFloat)*samps*fftLen);
outBuf = (complexFloat *)MALLOC(sizeof(complexFloat)*samps*fftLen);
fftBuf = (complexFloat *)MALLOC(sizeof(complexFloat)*fftLen);
ampBuf = (float *)MALLOC(sizeof(float)*fftLen);
phsBuf = (float *)MALLOC(sizeof(float)*fftLen);
time_vector = (float *)MALLOC(sizeof(float)*lines);
/* Open the Complex Image File */
if((inF=FOPEN(inName,"rb"))==NULL) {
printf("Complex Image file %s could not be opened\n",inName);
exit(EXIT_FAILURE);
}
strcat(outName,".cpx");
if((outF1=FOPEN(outName,"wb"))==NULL) {
printf("Unable to write output %s\n",outName);
exit(EXIT_FAILURE);
}
outMeta = meta_copy(inMeta);
outMeta->general->line_count =
chunk_int*(BLOCK_SIZE-2*TOSS_SIZE)+(last_chunk-2*TOSS_SIZE);
outMeta->general->sample_count = samps;
meta_write(outMeta, outName);
/* Find the filter frequency index values */
df = f_s/fftLen;
stop = 0;
i = 0;
while(stop<filtStart[0]) {
f_lo1 = i;
stop = df*i;
i++;
}
stop = 0;
i = 0;
while(stop<filtStart[1]) {
f_lo2=i;
stop=df*i;
i++;
}
i = fftLen;
stop = df*i;
while(stop>filtEnd[0]) {
f_hi1 = i;
stop = df*i;
i--;
}
i = fftLen;
stop = df*i;
while(stop>filtEnd[1]) {
f_hi2 = i;
stop = df*i;
i--;
}
/* Zero out all the arrays and begin processing data */
cur_time = 0;
for(i=0; i<fftLen; i++)
{
ampBuf[i] = 0;
phsBuf[i] = 0;
}
for(k=0; k<chunk_int+compensate_for_last_chunk; k++)
{
printf("\nProcessing Chunk %d of %d\n",k,lines/chunk_size);
start_line = (k==0) ? 0 : (k*chunk_size)-(2*TOSS_SIZE);
if (k==chunk_int)
chunk_size=last_chunk;
cur_time=start_line*(1/f_s);
/* Read in the data chunk & put in proper endian order */
printf("Reading %d Lines Starting at Line %d\n",chunk_size,start_line);
get_complexFloat_lines(inF, inMeta, start_line, chunk_size, inBuf);
/* Process the each column */
printf("Performing the FFT and Filtering Operations\n");
for(x=0; x<samps; x++)
{
if(x%1000 == 0) printf("Processing Column %d\n",x);
for(y=0;y<fftLen;y++)
{
fftBuf[y].real = 0;
fftBuf[y].imag = 0;
}
for(y=0;y<chunk_size;y++)
{
fftBuf[y].real = inBuf[y*samps+x].real;
fftBuf[y].imag = inBuf[y*samps+x].imag;
}
cfft1d(fftLen,fftBuf,-1);
for (i=0; i<fftLen; i++)
{
ampBuf[i] = sqrt(fftBuf[i].real*fftBuf[i].real
+ fftBuf[i].imag*fftBuf[i].imag);
if(fftBuf[i].imag!=0.0 || fftBuf[i].real!=0.0)
phsBuf[i] = atan2(fftBuf[i].imag,fftBuf[i].real);
else
phsBuf[i] = 0;
if(((i>f_lo1)&&(i<f_hi1)) || ((i>f_lo2) && (i<f_hi2)))
{
ampBuf[i] = 0;
phsBuf[i] = 0;
}
fftBuf[i].real = ampBuf[i]*cos(phsBuf[i]);
fftBuf[i].imag = ampBuf[i]*sin(phsBuf[i]);
}
cfft1d(fftLen,fftBuf,1);
for(i=0;i<chunk_size;i++)
{
outBuf[i*samps+x].real = fftBuf[i].real;
outBuf[i*samps+x].imag = fftBuf[i].imag;
}
}
printf("Finished the FFT and Filtering Operations\n");
/* Perform the time-domain frequency shift */
if(shift != 0.0)
{
for(i=0; i<chunk_size; i++)
time_vector[i] = cur_time+(1/f_s)*i;
printf("\nPerforming time-domain frequency shift of %.2f Hz\n",shift);
for(y=0; y<chunk_size; y++)
{
for(x=0; x<samps; x++)
{
A = outBuf[y*samps+x].real;
B = outBuf[y*samps+x].imag;
outBuf[y*samps+x].real = A*cos(2*pi*shift*time_vector[y])
- B*sin(2*pi*shift*time_vector[y]);
outBuf[y*samps+x].imag = B*cos(2*pi*shift*time_vector[y])
+ A*sin(2*pi*shift*time_vector[y]);
}
}
}
/* Write out the data file in big endian format */
printf("Writing the output lines %d to %d in file %s\n",
start_line, start_line+chunk_size-TOSS_SIZE, outName);
put_complexFloat_lines(outF1, outMeta, start_line,
samps*(chunk_size-TOSS_SIZE), outBuf+(samps*TOSS_SIZE));
}
printf("\n");
FCLOSE(outF1);
StopWatch();
return 0;
}
int main(int argc,char **argv)
{
int lines,samps,start_line; /* Number of image lines and samples */
int x,y,ii; /* Counters and the filter frequency indicies */
char *inName, *outName; /* Input filename */
char metaName[256]; /* Name of meta file */
complexFloat *inBuf; /* Input/Output Image Buffers */
complexFloat *fftBuf; /* FFT Buffer for the image */
float *ampBuf,*phsBuf; /* Amplitude and Phase Buffers */
float df, freq[FFT_LEN], f_s; /* Frequency Vector */
FILE *inF,*outF1; /* Input and Output file pointers */
meta_parameters *meta; /* Meta-file data pointer */
/* Usage is shown if the user doesn't give correct number of arguments */
if(argc!=4) { usage(argv[0]); }
StartWatch();
/* Get the filename and filter start and end frequencies from the command line */
inName = argv[1];
outName = argv[2];
start_line = atoi(argv[3]);
create_name(metaName, inName, ".meta");
/* Get the PRF and number of samples from the meta-file */
meta = meta_read(metaName);
lines = FFT_LEN;
samps = meta->general->sample_count;
f_s = 1/(meta->sar->azimuth_time_per_pixel);
printf("Sampling Frequency is %f\n",f_s);
/* Compute the FFT length based on the number of lines. Must be a power of 2 */
printf("FFT Length is %d\n",FFT_LEN);
cfft1d(FFT_LEN,NULL,0);
/* Allocate the memory for all the buffers */
inBuf = (complexFloat *)MALLOC(sizeof(complexFloat)*samps*FFT_LEN);
fftBuf = (complexFloat *)MALLOC(sizeof(complexFloat)*FFT_LEN);
ampBuf = (float *)MALLOC(sizeof(float)*FFT_LEN);
phsBuf = (float *)MALLOC(sizeof(float)*FFT_LEN);
df = f_s/FFT_LEN;
for(ii=0; ii<FFT_LEN; ii++) freq[ii] = df*ii;
/* Open the Complex Image File */
if((inF=FOPEN(inName,"rb"))==NULL) {
printf("Complex Image file %s could not be opened\n",inName);
exit(EXIT_FAILURE);
}
/* Zero out all the arrays and begin processing data */
for(ii=0; ii<FFT_LEN; ii++) {
ampBuf[ii]=0;
phsBuf[ii]=0;
}
/* Read in the data chunk */
printf("Reading Data Starting at Line %d\n",start_line);
get_complexFloat_lines(inF, meta, start_line, FFT_LEN, inBuf);
/* Process the each column, take the average at the end */
printf("Performing the FFT\n");
for(x=0; x<samps; x++) {
if(x%500 == 0) printf("Processing Column %d\n",x);
for(y=0; y<FFT_LEN; y++) {
fftBuf[y].real=0;
fftBuf[y].imag=0;
}
for(y=0; y<lines; y++) {
fftBuf[y].real=inBuf[y*samps+x].real;
fftBuf[y].imag=inBuf[y*samps+x].imag;
}
cfft1d(FFT_LEN,fftBuf,-1);
for (ii=0; ii<FFT_LEN; ii++) {
ampBuf[ii] += sqrt(fftBuf[ii].real*fftBuf[ii].real
+ fftBuf[ii].imag*fftBuf[ii].imag);
if(fftBuf[ii].imag!=0.0 || fftBuf[ii].real!=0.0)
phsBuf[ii] += atan2(fftBuf[ii].imag, fftBuf[ii].real);
}
}
printf("Finished the FFT\n");
/* Open and write output file */
strcat(outName,".spectra");
if((outF1=FOPEN(outName,"w"))==NULL) {
printf("Unable to write output %s\n",outName);
exit(EXIT_FAILURE);
}
for (ii=0; ii<FFT_LEN; ii++) {
ampBuf[ii] /= samps;
phsBuf[ii] /= samps;
fprintf(outF1,"%f %f %f\n",freq[ii],ampBuf[ii],phsBuf[ii]);
}
/* Close up & leave */
meta_free(meta);
FCLOSE(outF1);
StopWatch();
return 0;
}
static void get_uavsar_lines(ReadUavsarClientInfo *info, meta_parameters *meta,
int row, int n, float *buf)
{
// wrapper for get_float_line() that multilooks if needed
int j,ns=meta->general->sample_count;
if (info->ml) {
assert(meta->sar);
int i,k;
int nlooks = meta->sar->azimuth_look_count;
row *= nlooks;
// we fudged the line count in the metadata for the
// viewer (which is displaying a multilooked image), we must
// put the correct value back for the reader
int lc = meta->general->line_count;
meta->general->line_count = g_saved_line_count;
float *tmp = MALLOC(sizeof(float)*ns);
for (i=0; i<n; ++i) {
float *this_row = buf + i*ns;
get_float_line(info->fp, meta, row+i*nlooks, this_row);
for (j=0; j<ns; ++j)
ieee_big32(this_row[j]);
int n_read = nlooks;
for (k=1; k<nlooks; ++k) {
if (row+n*nlooks+k >= meta->general->line_count) {
--n_read;
} else {
get_float_line(info->fp, meta, row+i*nlooks+k, tmp);
for (j=0; j<ns; ++j)
ieee_big32(tmp[j]);
for (j=0; j<ns; ++j)
this_row[j] += tmp[j];
}
}
for (j=0; j<meta->general->sample_count; ++j)
this_row[j] /= n_read;
}
free(tmp);
// restore the fudged value
meta->general->line_count = lc;
}
else {
// no multilooking case
if (info->is_complex) {
complexFloat *cf_buf = MALLOC(sizeof(complexFloat)*ns*n);
get_complexFloat_lines(info->fp, meta, row, n, cf_buf);
for (j=0; j<n*ns; ++j) {
ieee_big32(cf_buf[j].real);
ieee_big32(cf_buf[j].imag);
buf[j] = hypot(cf_buf[j].real, cf_buf[j].imag);
//buf[j] = atan2_check(cf_buf[j].imag, cf_buf[j].real);
}
FREE(cf_buf);
}
else {
get_float_lines(info->fp, meta, row, n, buf);
for (j=0; j<n*ns; ++j)
ieee_big32(buf[j]);
}
}
}
void c2p_ext(const char *inDataName, const char *inMetaName,
const char *outfile, int multilook, int banded)
{
meta_parameters *in_meta = meta_read(inMetaName);
int data_type = in_meta->general->data_type;
// the old code did this, but why??
in_meta->general->data_type = meta_polar2complex(data_type);
// some sanity checks
switch (data_type) {
case COMPLEX_BYTE:
case COMPLEX_INTEGER16:
case COMPLEX_INTEGER32:
case COMPLEX_REAL32:
case COMPLEX_REAL64:
break;
default:
asfPrintError("c2p: %s is not a complex image.\n", inDataName);
}
if (in_meta->general->band_count != 1)
asfPrintError("c2p: %s is not a single-band image.\n", inDataName);
if (!in_meta->sar)
asfPrintError("c2p: %s is missing a SAR block.\n", inDataName);
asfPrintStatus("Converting complex image to amplitude/phase...\n");
int nl = in_meta->general->line_count;
int ns = in_meta->general->sample_count;
// process 1 line at a time when not multilooking, otherwise grab nlooks
int nlooks = multilook ? in_meta->sar->look_count : 1;
if (nlooks == 1 && multilook) {
asfPrintStatus("Not multilooking, look_count is 1.\n");
multilook = FALSE;
}
if (multilook)
asfPrintStatus("Multilooking with %d looks.\n", nlooks);
meta_parameters *out_meta = meta_read(inMetaName);
out_meta->general->data_type = meta_complex2polar(data_type);
// set up input/output files
FILE *fin = fopenImage(inDataName, "rb");
// we either have 1 or 2 output files, per the "banded" flag.
char *outfile_img = appendExt(outfile, ".img");
char *amp_name=NULL, *phase_name=NULL;
FILE *fout_banded=NULL, *fout_amp=NULL, *fout_phase=NULL;
if (banded) {
asfPrintStatus("Output is 2-band image: %s\n", outfile_img);
fout_banded = fopenImage(outfile_img, "wb");
} else {
amp_name = appendToBasename(outfile_img, "_amp");
phase_name = appendToBasename(outfile_img, "_phase");
asfPrintStatus("Output amplitude file: %s\n", amp_name);
asfPrintStatus("Output phase file: %s\n", phase_name);
fout_amp = fopenImage(amp_name, "wb");
fout_phase = fopenImage(phase_name, "wb");
}
if (banded)
assert(fout_banded && !fout_amp && !fout_phase);
else
assert(!fout_banded && fout_amp && fout_phase);
// get the metadata band_count correct, needed in the put_* calls
if (banded) {
out_meta->general->band_count = 2;
strcpy(out_meta->general->bands, "AMP,PHASE");
}
// input buffer
complexFloat *cpx = MALLOC(sizeof(complexFloat)*ns*nlooks);
// output buffers
float *amp = MALLOC(sizeof(float)*ns*nlooks);
float *phase = MALLOC(sizeof(float)*ns*nlooks);
int line_in; // line in the input image
int line_out=0; // line in the output image
int samp; // sample #, loop index
int l; // line loop index, iterates over the lines in the block
out_meta->general->line_count = (int)ceil((double)nl/(double)nlooks);
for (line_in=0; line_in<nl; line_in+=nlooks)
{
// lc = "line count" -- how many lines to read. normally we will read
// nlooks lines, but near eof we might have to read fewer
int lc = nlooks;
if (line_in + lc > nl)
lc = nl - line_in;
// read "nlooks" (or possibly fewer, if near eof) lines of data
int blockSize = get_complexFloat_lines(fin,in_meta,line_in,lc,cpx);
if (blockSize != lc*ns)
asfPrintError("bad blockSize: bs=%d nlooks=%d ns=%d\n",
blockSize, nlooks, ns);
// first, compute the power/phase
for (l=0; l<lc; ++l) {
for (samp=0; samp<ns; ++samp) {
int k = l*ns + samp; // index into the block
float re = cpx[k].real;
float im = cpx[k].imag;
if (re != 0.0 || im != 0.0) {
amp[k] = re*re + im*im;
phase[k] = atan2(im, re);
} else {
amp[k] = phase[k] = 0.0;
}
}
}
// now multilook, if requested
if (multilook) {
// put the multilooked data in the first "row" of amp,phase
for (samp=0; samp<ns; ++samp) {
float value = 0.0;
for (l=0; l<lc; ++l)
value += amp[l*ns + samp];
amp[samp] = sqrt(value/(float)lc);
value = 0.0;
for (l=0; l<lc; ++l)
value += phase[l*ns + samp];
phase[samp] = value/(float)lc;
}
}
else {
for (samp=0; samp<ns*lc; ++samp)
amp[samp] = sqrt(amp[samp]);
}
// write out a line (multilooked) or a bunch of lines (not multi)
if (multilook) {
if (banded) {
put_band_float_line(fout_banded, out_meta, 0, line_out, amp);
put_band_float_line(fout_banded, out_meta, 1, line_out, phase);
} else {
put_float_line(fout_amp, out_meta, line_out, amp);
put_float_line(fout_phase, out_meta, line_out, phase);
}
++line_out;
} else {
for (l=0; l<lc; ++l) {
if (banded) {
put_band_float_line(fout_banded, out_meta, 0, line_in+l, amp);
put_band_float_line(fout_banded, out_meta, 1, line_in+l, phase);
} else {
put_float_line(fout_amp, out_meta, line_in+l, amp);
put_float_line(fout_phase, out_meta, line_in+l, phase);
}
++line_out;
}
}
asfPercentMeter((float)line_in/(float)(nl));
}
asfPercentMeter(1.0);
fclose(fin);
if (fout_banded) fclose(fout_banded);
if (fout_amp) fclose(fout_amp);
if (fout_phase) fclose(fout_phase);
if (multilook) {
if (out_meta->general->line_count != line_out)
asfPrintError("Line counts don't match: %d != %d\n",
out_meta->general->line_count, line_out);
out_meta->general->y_pixel_size *= nlooks;
out_meta->sar->azimuth_time_per_pixel *= nlooks;
out_meta->sar->multilook = TRUE;
} else
assert(line_out == nl);
// write out the metadata, different whether multi-banded or not
if (banded) {
assert(!amp_name && !phase_name);
meta_write(out_meta, outfile);
} else {
assert(amp_name && phase_name);
out_meta->general->image_data_type = AMPLITUDE_IMAGE;
meta_write(out_meta, amp_name);
out_meta->general->image_data_type = PHASE_IMAGE;
meta_write(out_meta, phase_name);
}
if (multilook)
asfPrintStatus("Original line count: %d, after multilooking: %d "
"(%d looks)\n", nl, line_out, nlooks);
meta_free(in_meta);
meta_free(out_meta);
FREE(amp);
FREE(phase);
FREE(cpx);
FREE(outfile_img);
FREE(amp_name);
FREE(phase_name);
}
int asf_igram_coh(int lookLine, int lookSample, int stepLine, int stepSample,
char *masterFile, char *slaveFile, char *outBase,
float *average)
{
char ampFile[255], phaseFile[255]; //, igramFile[512];
char cohFile[512], ml_ampFile[255], ml_phaseFile[255]; //, ml_igramFile[512];
FILE *fpMaster, *fpSlave, *fpAmp, *fpPhase, *fpCoh, *fpAmp_ml, *fpPhase_ml;
int line, sample_count, line_count, count;
float bin_high, bin_low, max=0.0, sum_a, sum_b, ampScale;
double hist_sum=0.0, percent, percent_sum;
long long hist_val[HIST_SIZE], hist_cnt=0;
meta_parameters *inMeta,*outMeta, *ml_outMeta;
complexFloat *master, *slave, *sum_igram, *sum_ml_igram;
float *amp, *phase, *sum_cpx_a, *sum_cpx_b, *coh, *pCoh;
float *ml_amp, *ml_phase;
// FIXME: Processing flow with two-banded interferogram needed - backed out
// for now
create_name(ampFile, outBase,"_igram_amp.img");
create_name(phaseFile, outBase,"_igram_phase.img");
create_name(ml_ampFile, outBase,"_igram_ml_amp.img");
create_name(ml_phaseFile, outBase,"_igram_ml_phase.img");
//create_name(igramFile, outBase,"_igram.img");
//create_name(ml_igramFile, outBase, "_igram_ml.img");
//sprintf(cohFile, "coherence.img");
create_name(cohFile, outBase, "_coh.img");
// Read input meta file
inMeta = meta_read(masterFile);
line_count = inMeta->general->line_count;
sample_count = inMeta->general->sample_count;
ampScale = 1.0/(stepLine*stepSample);
// Generate metadata for single-look images
outMeta = meta_read(masterFile);
outMeta->general->data_type = REAL32;
// Write metadata for interferometric amplitude
outMeta->general->image_data_type = AMPLITUDE_IMAGE;
meta_write(outMeta, ampFile);
// Write metadata for interferometric phase
outMeta->general->image_data_type = PHASE_IMAGE;
meta_write(outMeta, phaseFile);
/*
// Write metadata for interferogram
outMeta->general->image_data_type = INTERFEROGRAM;
outMeta->general->band_count = 2;
strcpy(outMeta->general->bands, "IGRAM-AMP,IGRAM-PHASE");
meta_write(outMeta, igramFile);
*/
// Generate metadata for multilooked images
ml_outMeta = meta_read(masterFile);
ml_outMeta->general->data_type = REAL32;
ml_outMeta->general->line_count = line_count/stepLine;
ml_outMeta->general->sample_count = sample_count/stepSample;
ml_outMeta->general->x_pixel_size *= stepSample;
ml_outMeta->general->y_pixel_size *= stepLine;
ml_outMeta->sar->multilook = 1;
ml_outMeta->sar->line_increment *= stepLine;
ml_outMeta->sar->sample_increment *= stepSample;
// FIXME: This is the wrong increment but create_dem_grid does not know any
// better at the moment.
//ml_outMeta->sar->line_increment = 1;
//ml_outMeta->sar->sample_increment = 1;
// Write metadata for multilooked interferometric amplitude
ml_outMeta->general->image_data_type = AMPLITUDE_IMAGE;
meta_write(ml_outMeta, ml_ampFile);
// Write metadata for multilooked interferometric phase
ml_outMeta->general->image_data_type = PHASE_IMAGE;
meta_write(ml_outMeta, ml_phaseFile);
// Write metadata for coherence image
ml_outMeta->general->image_data_type = COHERENCE_IMAGE;
meta_write(ml_outMeta, cohFile);
/*
// Write metadata for multilooked interferogram
ml_outMeta->general->image_data_type = INTERFEROGRAM;
strcpy(ml_outMeta->general->bands, "IGRAM-AMP,IGRAM-PHASE");
ml_outMeta->general->band_count = 2;
meta_write(ml_outMeta, ml_igramFile);
*/
// Allocate memory
master = (complexFloat *) MALLOC(sizeof(complexFloat)*sample_count*lookLine);
slave = (complexFloat *) MALLOC(sizeof(complexFloat)*sample_count*lookLine);
amp = (float *) MALLOC(sizeof(float)*sample_count*lookLine);
phase = (float *) MALLOC(sizeof(float)*sample_count*lookLine);
ml_amp = (float *) MALLOC(sizeof(float)*sample_count/stepSample);
ml_phase = (float *) MALLOC(sizeof(float)*sample_count/stepSample);
coh = (float *) MALLOC(sizeof(float)*sample_count/stepSample);
sum_cpx_a = (float *) MALLOC(sizeof(float)*sample_count);
sum_cpx_b = (float *) MALLOC(sizeof(float)*sample_count);
sum_igram = (complexFloat *) MALLOC(sizeof(complexFloat)*sample_count);
sum_ml_igram = (complexFloat *) MALLOC(sizeof(complexFloat)*sample_count);
// Open files
fpMaster = FOPEN(masterFile,"rb");
fpSlave = FOPEN(slaveFile,"rb");
fpAmp = FOPEN(ampFile,"wb");
fpPhase = FOPEN(phaseFile,"wb");
fpAmp_ml = FOPEN(ml_ampFile,"wb");
fpPhase_ml = FOPEN(ml_phaseFile,"wb");
//FILE *fpIgram = FOPEN(igramFile, "wb");
//FILE *fpIgram_ml = FOPEN(ml_igramFile, "wb");
fpCoh = FOPEN(cohFile,"wb");
// Initialize histogram
for (count=0; count<HIST_SIZE; count++) hist_val[count] = 0;
asfPrintStatus(" Calculating interferogram and coherence ...\n\n");
for (line=0; line<line_count; line+=stepLine)
{
register int offset, row, column, limitLine;
double igram_real, igram_imag;
int inCol;
limitLine=MIN(lookLine, line_count-line);
printf("Percent completed %3.0f\r",(float)line/line_count*100.0);
pCoh = coh;
// Read in the next lines of data
get_complexFloat_lines(fpMaster, inMeta, line, limitLine, master);
get_complexFloat_lines(fpSlave, inMeta, line, limitLine, slave);
// Add the remaining rows into sum vectors
offset = sample_count;
for (column=0; column<sample_count; column++)
{
offset = column;
sum_cpx_a[column] = 0.0;
sum_cpx_b[column] = 0.0;
sum_igram[column].real = 0.0;
sum_igram[column].imag = 0.0;
sum_ml_igram[column].real = 0.0;
sum_ml_igram[column].imag = 0.0;
igram_real = 0.0;
igram_imag = 0.0;
for (row=0; row<limitLine; row++)
{
// Complex multiplication for interferogram generation
igram_real = master[offset].real*slave[offset].real +
master[offset].imag*slave[offset].imag;
igram_imag = master[offset].imag*slave[offset].real -
master[offset].real*slave[offset].imag;
amp[offset] = sqrt(igram_real*igram_real + igram_imag*igram_imag);
if (FLOAT_EQUIVALENT(igram_real, 0.0) ||
FLOAT_EQUIVALENT(igram_imag, 0.0))
phase[offset]=0.0;
else
phase[offset] = atan2(igram_imag, igram_real);
sum_cpx_a[column] += AMP(master[offset])*AMP(master[offset]);
sum_cpx_b[column] += AMP(slave[offset])*AMP(slave[offset]);
sum_igram[column].real += igram_real;
sum_igram[column].imag += igram_imag;
if (line % stepLine == 0 && row < stepLine) {
sum_ml_igram[column].real += igram_real;
sum_ml_igram[column].imag += igram_imag;
}
offset += sample_count;
}
ml_amp[column] =
sqrt(sum_ml_igram[column].real*sum_ml_igram[column].real +
sum_ml_igram[column].imag*sum_ml_igram[column].imag)*ampScale;
if (FLOAT_EQUIVALENT(sum_ml_igram[column].real, 0.0) ||
FLOAT_EQUIVALENT(sum_ml_igram[column].imag, 0.0))
ml_phase[column] = 0.0;
else
ml_phase[column] = atan2(sum_ml_igram[column].imag,
sum_ml_igram[column].real);
}
// Write single-look and multilooked amplitude and phase
put_float_lines(fpAmp, outMeta, line, stepLine, amp);
put_float_lines(fpPhase, outMeta, line, stepLine, phase);
put_float_line(fpAmp_ml, ml_outMeta, line/stepLine, ml_amp);
put_float_line(fpPhase_ml, ml_outMeta, line/stepLine, ml_phase);
//put_band_float_lines(fpIgram, outMeta, 0, line, stepLine, amp);
//put_band_float_lines(fpIgram, outMeta, 1, line, stepLine, phase);
//put_band_float_line(fpIgram_ml, ml_outMeta, 0, line/stepLine, ml_amp);
//put_band_float_line(fpIgram_ml, ml_outMeta, 1, line/stepLine, ml_phase);
// Calculate the coherence by adding from sum vectors
for (inCol=0; inCol<sample_count; inCol+=stepSample)
{
register int limitSample = MIN(lookSample,sample_count-inCol);
sum_a = 0.0;
sum_b = 0.0;
igram_real = 0.0;
igram_imag = 0.0;
// Step over multilook area and sum output columns
for (column=0; column<limitSample; column++)
{
igram_real += sum_igram[inCol+column].real;
igram_imag += sum_igram[inCol+column].imag;
sum_a += sum_cpx_a[inCol+column];
sum_b += sum_cpx_b[inCol+column];
}
if (FLOAT_EQUIVALENT((sum_a*sum_b), 0.0))
*pCoh = 0.0;
else
{
*pCoh = (float) sqrt(igram_real*igram_real + igram_imag*igram_imag) /
sqrt(sum_a * sum_b);
if (*pCoh>1.0001)
{
printf(" coh = %f -- setting to 1.0\n",*pCoh);
printf(" You shouldn't have seen this!\n");
printf(" Exiting.\n");
exit(EXIT_FAILURE);
*pCoh=1.0;
}
}
pCoh++;
}
// Write out values for coherence
put_float_line(fpCoh, ml_outMeta, line/stepLine, coh);
// Keep filling coherence histogram
for (count=0; count<sample_count/stepSample; count++)
{
register int tmp;
tmp = (int) (coh[count]*HIST_SIZE); /* Figure out which bin this value is in */
/* This shouldn't happen */
if(tmp >= HIST_SIZE)
tmp = HIST_SIZE-1;
if(tmp < 0)
tmp = 0;
hist_val[tmp]++; // Increment that bin for the histogram
hist_sum += coh[count]; // Add up the values for the sum
hist_cnt++; // Keep track of the total number of values
if (coh[count]>max)
max = coh[count]; // Calculate maximum coherence
}
} // End for line
printf("Percent completed %3.0f\n",(float)line/line_count*100.0);
// Sum and print the statistics
percent_sum = 0.0;
printf(" Coherence : Occurrences : Percent\n");
printf(" ---------------------------------------\n");
for (count=0; count<HIST_SIZE; count++) {
bin_low = (float)(count)/(float)HIST_SIZE;
bin_high = (float)(count+1)/(float)HIST_SIZE;
percent = (double)hist_val[count]/(double)hist_cnt;
percent_sum += (float)100*percent;
printf(" %.2f -> %.2f : %.8lld %2.3f \n",
bin_low,bin_high, (long long) hist_val[count],100*percent);
}
*average = (float)hist_sum/(float)hist_cnt;
printf(" ---------------------------------------\n");
printf(" Maximum Coherence: %.3f\n", max);
printf(" Average Coherence: %.3f (%.1f / %lld) %f\n",
*average,hist_sum, hist_cnt, percent_sum);
// Free and exit
FREE(master);
FREE(slave);
FREE(amp);
FREE(phase);
FREE(ml_amp);
FREE(ml_phase);
FREE(coh);
FCLOSE(fpMaster);
FCLOSE(fpSlave);
FCLOSE(fpAmp);
FCLOSE(fpPhase);
FCLOSE(fpAmp_ml);
FCLOSE(fpPhase_ml);
//FCLOSE(fpIgram);
//FCLOSE(fpIgram_ml);
FCLOSE(fpCoh);
meta_free(inMeta);
meta_free(outMeta);
meta_free(ml_outMeta);
return(0);
}
