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