Bibliothèque de traitements d'images en virgule flottante. http://la.buvette.org/photos/cumul/
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/*
* OPERATORS
*
* operations entre des images.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <string.h>
#include <math.h>
#include "../floatimg.h"
extern int verbosity; /* must be declared around main() */
/* ---------------------------------------------------------------- */
/*
* A + B -> D
*/
int fimg_add_3(FloatImg *a, FloatImg *b, FloatImg *d)
{
int idx, nbpixels;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, a, b, d);
#endif
if (FIMG_TYPE_RGB != a->type ||
FIMG_TYPE_RGB != b->type ||
FIMG_TYPE_RGB != d->type) {
fprintf(stderr, "%s : got a bad type fimg\n", __func__);
return -8;
}
nbpixels = a->width * a->height;
for (idx=0; idx<nbpixels; idx++) {
d->R[idx] = a->R[idx] + b->R[idx];
d->G[idx] = a->G[idx] + b->G[idx];
d->B[idx] = a->B[idx] + b->B[idx];
}
return 0;
}
/* ---------------------------------------------------------------- */
/*
* B += A may be faster than fimg_add_3 ?
*/
int fimg_add_2(FloatImg *a, FloatImg *b)
{
int idx, nbpixels;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p )\n", __func__, a, b);
#endif
if (FIMG_TYPE_RGB != a->type || FIMG_TYPE_RGB != b->type) {
fprintf(stderr, "%s : got a bad type fimg\n", __func__);
return -8;
}
nbpixels = a->width * a->height;
for (idx=0; idx<nbpixels; idx++) {
b->R[idx] += a->R[idx];
b->G[idx] += a->G[idx];
b->B[idx] += a->B[idx];
}
return 0;
}
/* ---------------------------------------------------------------- */
/*
* A - B -> D
*/
int fimg_sub_3(FloatImg *a, FloatImg *b, FloatImg *d)
{
int idx, nbpixels;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, a, b, d);
#endif
if ( FIMG_TYPE_RGB != a->type ||
FIMG_TYPE_RGB != b->type ||
FIMG_TYPE_RGB != d->type) {
fprintf(stderr, "%s : got a bad type fimg\n", __func__);
return -8;
}
nbpixels = a->width * a->height;
/* maybe we can speedup this loop for
* avoiding the cache strashing ?
*/
for (idx=0; idx<nbpixels; idx++) {
d->R[idx] = fabs(a->R[idx] - b->R[idx]);
d->G[idx] = fabs(a->G[idx] - b->G[idx]);
d->B[idx] = fabs(a->B[idx] - b->B[idx]);
}
return 0;
}
/* ---------------------------------------------------------------- */
/*
* B *= A may be faster than fimg_mul_3 ?
*/
int fimg_mul_2(FloatImg *a, FloatImg *b)
{
int idx, nbpixels;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p )\n", __func__, a, b);
#endif
if (FIMG_TYPE_RGB != a->type || FIMG_TYPE_RGB != b->type) {
fprintf(stderr, "%s : got a bad type fimg\n", __func__);
return -8;
}
nbpixels = a->width * a->height;
for (idx=0; idx<nbpixels; idx++) {
b->R[idx] *= a->R[idx];
b->G[idx] *= a->G[idx];
b->B[idx] *= a->B[idx];
}
return 0;
}
/* ---------------------------------------------------------------- */
/*
* A * B -> D
*/
int fimg_mul_3(FloatImg *a, FloatImg *b, FloatImg *d)
{
int idx, nbpixels;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, a, b, d);
#endif
if (FIMG_TYPE_RGB != a->type || FIMG_TYPE_RGB != b->type ||
FIMG_TYPE_RGB != d->type) {
fprintf(stderr, "%s : got a bad type fimg\n", __func__);
return -8;
}
nbpixels = a->width * a->height;
for (idx=0; idx<nbpixels; idx++) {
d->R[idx] = a->R[idx] * b->R[idx];
d->G[idx] = a->G[idx] * b->G[idx];
d->B[idx] = a->B[idx] * b->B[idx];
}
return 0;
}
/* ---------------------------------------------------------------- */
int fimg_minimum(FloatImg *a, FloatImg *b, FloatImg *d)
{
int idx, nbiter;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, a, b, d);
#endif
if (FIMG_TYPE_RGB != a->type || FIMG_TYPE_RGB != b->type ||
FIMG_TYPE_RGB != d->type) {
fprintf(stderr, "%s : got a bad type fimg\n", __func__);
return -8;
}
nbiter = a->width * a->height;
for (idx=0; idx<nbiter; idx++) {
if (a->R[idx] < b->R[idx]) d->R[idx] = a->R[idx];
else d->R[idx] = b->R[idx];
if (a->G[idx] < b->G[idx]) d->G[idx] = a->G[idx];
else d->G[idx] = b->G[idx];
if (a->B[idx] < b->B[idx]) d->B[idx] = a->B[idx];
else d->B[idx] = b->B[idx];
}
return 0;
}
/* ---------------------------------------------------------------- */
int fimg_maximum(FloatImg *a, FloatImg *b, FloatImg *d)
{
int idx, nbiter;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, a, b, d);
#endif
if (FIMG_TYPE_RGB != a->type || FIMG_TYPE_RGB != b->type ||
FIMG_TYPE_RGB != d->type) {
fprintf(stderr, "%s : got a bad type fimg\n", __func__);
return -8;
}
nbiter = a->width * a->height ;
for (idx=0; idx<nbiter; idx++) {
if (a->R[idx] > b->R[idx]) d->R[idx] = a->R[idx];
else d->R[idx] = b->R[idx];
if (a->G[idx] > b->G[idx]) d->G[idx] = a->G[idx];
else d->G[idx] = b->G[idx];
if (a->B[idx] > b->B[idx]) d->B[idx] = a->B[idx];
else d->B[idx] = b->B[idx];
}
return 0;
}
/* ---------------------------------------------------------------- */