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/*
* integration_check.c
*
* Check peak integration
*
* (c) 2011 Thomas White <taw@physics.org>
*
* Part of CrystFEL - crystallography with a FEL
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include "../src/image.h"
#include "../src/peaks.h"
#include "../src/utils.h"
#include "../src/beam-parameters.h"
int main(int argc, char *argv[])
{
struct image image;
double fsp, ssp, intensity, bg, max, sigma;
int fs, ss;
image.data = malloc(128*128*sizeof(float));
image.flags = NULL;
image.det = calloc(1, sizeof(struct detector));
image.det->n_panels = 1;
image.det->panels = calloc(1, sizeof(struct panel));
image.det->panels[0].min_fs = 0;
image.det->panels[0].max_fs = 128;
image.det->panels[0].min_ss = 0;
image.det->panels[0].max_ss = 128;
image.det->panels[0].fsx = 1.0;
image.det->panels[0].fsy = 0.0;
image.det->panels[0].ssx = 0.0;
image.det->panels[0].ssy = 1.0;
image.det->panels[0].xfs = 1.0;
image.det->panels[0].yfs = 0.0;
image.det->panels[0].xss = 0.0;
image.det->panels[0].yss = 1.0;
image.det->panels[0].cnx = -64.0;
image.det->panels[0].cny = -64.0;
image.det->panels[0].clen = 1.0;
image.det->panels[0].res = 1.0;
image.det->panels[0].integr_radius = 10.0;
image.width = 128;
image.height = 128;
memset(image.data, 0, 128*128*sizeof(float));
image.beam = calloc(1, sizeof(struct beam_params));
image.beam->adu_per_photon = 100.0;
/* First check: no intensity -> zero intensity and bg */
integrate_peak(&image, 64, 64, &fsp, &ssp, &intensity,
&bg, &max, &sigma, 0, 1);
STATUS(" First check: intensity = %.2f, bg = %.2f, max = %.2f,"
" sigma = %.2f\n", intensity, bg, max, sigma);
if ( intensity != 0.0 ) {
ERROR("Intensity should be zero.\n");
return 1;
}
if ( bg != 0.0 ) {
ERROR("Background should be zero.\n");
return 1;
}
/* Second check: uniform peak gives correct value and no bg */
for ( fs=0; fs<image.width; fs++ ) {
for ( ss=0; ss<image.height; ss++ ) {
if ( (fs-64)*(fs-64) + (ss-64)*(ss-64) > 9*9 ) continue;
image.data[fs+image.width*ss] = 1000.0;
}
}
integrate_peak(&image, 64, 64, &fsp, &ssp, &intensity,
&bg, &max, &sigma, 0, 1);
STATUS("Second check: intensity = %.2f, bg = %.2f, max = %.2f,"
" sigma = %.2f\n", intensity, bg, max, sigma);
if ( fabs(intensity - M_PI*9.0*9.0*1000.0) > 4000.0 ) {
ERROR("Intensity should be close to 1000*pi*integr_r^2\n");
return 1;
}
if ( bg != 0.0 ) {
ERROR("Background should be zero.\n");
return 1;
}
if ( max != 1000.0 ) {
ERROR("Max should be 1000.\n");
return 1;
}
if ( sigma != 0.0 ) {
ERROR("Sigma should be zero.\n");
return 1;
}
/* Third check: Poisson background should get mostly subtracted */
for ( fs=0; fs<image.width; fs++ ) {
for ( ss=0; ss<image.height; ss++ ) {
image.data[fs+image.width*ss] = poisson_noise(10.0);
}
}
integrate_peak(&image, 64, 64, &fsp, &ssp, &intensity,
&bg, &max, &sigma, 0, 1);
STATUS(" Third check: intensity = %.2f, bg = %.2f, max = %.2f,"
" sigma = %.2f\n", intensity, bg, max, sigma);
if ( fabs(intensity) > 100.0 ) {
ERROR("Intensity should be close to zero.\n");
return 1;
}
if ( fabs(bg-10.0) > 10.0 ) {
ERROR("Background should be close to ten.\n");
return 1;
}
if ( fabs(intensity) > sigma ) {
ERROR("Intensity should be less than sigma.\n");
return 1;
}
if ( fabs(sigma-71.0) > 10.0 ) {
ERROR("Sigma should be close to 71.\n");
return 1;
}
/* Fourth check: peak on Poisson background */
for ( fs=0; fs<image.width; fs++ ) {
for ( ss=0; ss<image.height; ss++ ) {
if ( (fs-64)*(fs-64) + (ss-64)*(ss-64) > 9*9 ) continue;
image.data[fs+image.width*ss] = 1000.0;
}
}
integrate_peak(&image, 64, 64, &fsp, &ssp, &intensity,
&bg, &max, &sigma, 0, 1);
STATUS("Fourth check: intensity = %.2f, bg = %.2f, max = %.2f,"
" sigma = %.2f\n", intensity, bg, max, sigma);
if ( fabs(intensity - M_PI*9.0*9.0*1000.0) > 10000.0 ) {
ERROR("Intensity should be close to 1000*pi*integr_r^2.\n");
return 1;
}
if ( fabs(bg - 10.0) > 1.0 ) {
ERROR("Background should be close to 10.\n");
return 1;
}
if ( fabs(sigma-71.0) > 10.0 ) {
ERROR("Sigma should be close to 71.\n");
return 1;
}
free(image.beam);
free(image.det->panels);
free(image.det);
free(image.data);
return 0;
}
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