libtthimage/Lib/distances.c

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2022-06-27 02:19:31 +02:00
/*
* CALCULS DE LA DISTANCE ENTRE DEUX IMAGES
*
* new 12 janvier 2009 - avenue St Exupery - dans un etat de grosse fatique
*/
#include <stdio.h>
#include <stdlib.h>
#include "../tthimage.h"
/*::------------------------------------------------------------------::*/
/*
*/
int
Image_distance_0(Image_Desc *ia, Image_Desc *ib,
double *dr, double *dg, double *db)
{
int foo, x, y;
int ra, ga, ba, rb, gb, bb;
if ( (foo=Image_compare_desc(ia, ib)) ) {
fprintf(stderr, "%s: images are differents %d\n", __func__, foo);
return foo;
}
*dr = *dg = *db = 0.0;
for (y=0; y<ia->height; y++)
{
for (x=0; x<ia->width; x++)
{
ra = (ia->Rpix[y])[x];
ga = (ia->Gpix[y])[x];
ba = (ia->Bpix[y])[x];
rb = (ib->Rpix[y])[x];
gb = (ib->Gpix[y])[x];
bb = (ib->Bpix[y])[x];
*dr += ((double)abs(ra - rb)) / 255.9999999;
*dg += ((double)abs(ga - gb)) / 255.9999999;
*db += ((double)abs(ba - bb)) / 255.9999999;
}
}
#if DEBUG_LEVEL > 1
fprintf(stderr, "%s: %12.3f %12.3f %12.3f\n", __func__, *dr, *dg, *db);
#endif
return FUNC_IS_BETA;
}
/*::------------------------------------------------------------------::*/
/*
*/
int
Image_distance_1(Image_Desc *ia, Image_Desc *ib,
double *dr, double *dg, double *db)
{
int foo, x, y;
if ( (foo=Image_compare_desc(ia, ib)) ) {
fprintf(stderr, "%s: images are differents %d\n", __func__, foo);
return foo;
}
*dr = *dg = *db = 42e42;
for (y=0; y<ia->height; y++)
{
for (x=0; x<ia->width; x++)
{
/* FIXME need more code */
}
}
return FUNC_IS_ALPHA;
}
/*::------------------------------------------------------------------::*/