Bibliothèque de traitements d'images en virgule flottante. http://la.buvette.org/photos/cumul/
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/*
* FLOATIMG
* egalisation dynamique approximative
* #coronamaison Thu 09 Apr 2020 03:37:10 PM CEST
*/
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include "../floatimg.h"
extern int verbosity;
/* --------------------------------------------------------------------- */
int fimg_equalize_compute(FloatImg *src, void *vptr, float vmax)
{
float minmax[6];
int foo;
float dr, dg, db;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %f )\n", __func__, src, vptr, vmax);
#endif
memset(minmax, 0, 6*sizeof(float));
foo = fimg_get_minmax_rgb(src, minmax);
if (foo) {
fprintf(stderr, "err %d get minmax in %s\n", foo, __func__);
return foo;
}
dr = minmax[1] - minmax[0];
dg = minmax[3] - minmax[2];
db = minmax[5] - minmax[4];
printf("Rmin %12.4g max %12.4g delta %12.4g\n", minmax[0], minmax[1], dr);
printf("Gmin %12.4g max %12.4g delta %12.4g\n", minmax[2], minmax[3], dg);
printf("Bmin %12.4g max %12.4g delta %12.4g\n", minmax[4], minmax[5], db);
if ( (minmax[0]<0.0) || (minmax[2]<0.0) || (minmax[4]<0.0) ) {
fprintf(stderr, "%s: negative value ?\n", __func__);
return -4;
}
// printf("deltas %12.4g %12.4g %12.4g\n", dr, dg, db);
return 0;
}
/* --------------------------------------------------------------------- */
/* --------------------------------------------------------------------- */
/* --------------------------------------------------------------------- */