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/*
* templates.c
*
* Handle templates
*
* (c) 2006-2009 Thomas White <thomas.white@desy.de>
*
* template_index - Indexing diffraction patterns by template matching
*
*/
#define _GNU_SOURCE 1
#include <stdlib.h>
#include <assert.h>
#include <math.h>
#include <stdio.h>
#include "templates.h"
#include "cell.h"
#include "image.h"
#include "utils.h"
#include "relrod.h"
struct _templatelist
{
int n_templates;
struct template *templates;
};
struct template_feature
{
float x;
float y;
struct template_feature *next;
};
struct template
{
float omega;
float tilt;
struct template_feature *features;
};
static int template_add(TemplateList *list, struct template *template)
{
if ( list->templates ) {
list->templates = realloc(list->templates,
(list->n_templates+1)*sizeof(struct template));
} else {
assert(list->n_templates == 0);
list->templates = malloc(sizeof(struct template));
}
/* Copy the data */
list->templates[list->n_templates] = *template;
list->n_templates++;
return list->n_templates - 1;
}
static TemplateList *template_list_new()
{
TemplateList *list;
list = malloc(sizeof(TemplateList));
list->n_templates = 0;
list->templates = NULL;
return list;
}
TemplateList *generate_templates(UnitCell *cell, struct image params)
{
TemplateList *list;
double omega, tilt;
list = template_list_new();
omega = deg2rad(40.0);
//for ( omega=deg2rad(-180); omega<deg2rad(180); omega+=deg2rad(1) ) {
params.omega = omega;
for ( tilt=0; tilt<deg2rad(180); tilt+=deg2rad(1) ) {
struct template t;
struct template_feature *tfc;
int nrefl, i;
t.omega = omega;
t.tilt = tilt;
t.features = malloc(sizeof(struct template_feature));
t.features->next = NULL;
tfc = t.features;
params.tilt = tilt;
get_reflections(¶ms, cell, 0.01e9);
nrefl = image_feature_count(params.rflist);
for ( i=0; i<nrefl; i++ ) {
struct imagefeature *f;
f = image_get_feature(params.rflist, i);
tfc->x = f->x;
tfc->y = f->y;
tfc->next = malloc(sizeof(struct template_feature));
tfc = tfc->next;
}
template_add(list, &t);
image_feature_list_free(params.rflist);
printf("Generating templates... %+5.2f %+5.2f\r",
rad2deg(omega), rad2deg(tilt));
}
//}
printf("Generating templates... done \n");
return list;
}
static int try_template(struct image *image, struct template template)
{
int fit = 0;
struct template_feature *f;
f = template.features;
while ( f != NULL ) {
int x, y;
x = f->x;
y = f->y; /* Discards digits after the decimal point */
fit += image->data[y*image->width+x];
f = f->next;
}
return fit;
}
int try_templates(struct image *image, TemplateList *list)
{
int i;
int fit_max = 0;
int i_max = 0;
for ( i=0; i<list->n_templates; i++ ) {
int fit;
fit = try_template(image, list->templates[i]);
if ( fit > fit_max ) {
fit_max = fit;
i_max = i;
}
}
image->omega = list->templates[i_max].omega;
image->tilt = list->templates[i_max].tilt;
return 0;
}
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