94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
/*
|
|
* classif.c
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
|
|
#include "../floatimg.h"
|
|
|
|
int verbosity;
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
/* nouveau 2 octobre 2020, juste avant sonoptic de la pluie craignos */
|
|
|
|
int fimg_classif_trial(FloatImg *psrc, FloatImg *pdst, float fval, int notused)
|
|
{
|
|
float minmax[6], delta[3], baryc[3];
|
|
float range, dist, rgb[3], dr, dg, db;
|
|
int x, y, on, off;
|
|
|
|
#if DEBUG_LEVEL
|
|
fprintf(stderr, ">>> %s ( %p %p %f %d )\n", __func__, psrc, pdst, fval, notused);
|
|
#endif
|
|
|
|
/* calculer les amplitudes RGB de l'image source */
|
|
fimg_get_minmax_rgb(psrc, minmax);
|
|
delta[0] = minmax[1] - minmax[0];
|
|
delta[1] = minmax[3] - minmax[2];
|
|
delta[2] = minmax[5] - minmax[4];
|
|
|
|
/* chercher le plus petit des deltas */
|
|
range = delta[0]; if (delta[1]<range) range=delta[1];
|
|
if (delta[2]<range) range=delta[2];
|
|
|
|
/* convertir le diametre en rayon (magic inside) */
|
|
range *= fval;
|
|
|
|
if (verbosity ) fprintf(stderr, "deltas : %f %f %f / %f\n",
|
|
delta[0], delta[1], delta[2], range);
|
|
|
|
|
|
/* calcul du "barycentre" chromatique */
|
|
baryc[0] = (minmax[1] + minmax[0]) / 2;
|
|
baryc[1] = (minmax[3] + minmax[2]) / 2;
|
|
baryc[2] = (minmax[5] + minmax[4]) / 2;
|
|
if (verbosity) fprintf(stderr, "barycs : %f %f %f\n",
|
|
baryc[0], baryc[1], baryc[2]);
|
|
|
|
on = off = 0;
|
|
|
|
for (y=0; y<psrc->height; y++) {
|
|
for (x=0; x<psrc->width; x++) {
|
|
|
|
fimg_get_rgb(psrc, x, y, rgb);
|
|
|
|
/* calcul de la distance chromatique */
|
|
dr = rgb[0] - baryc[0];
|
|
dg = rgb[1] - baryc[1];
|
|
db = rgb[2] - baryc[2];
|
|
dist = sqrtf( (dr*dr) + (dg*dg) + (db*db) );
|
|
|
|
#if DEBUG_LEVEL
|
|
if (x==y) fprintf(stderr, "%4d %4d %f\n", x, y, dist);
|
|
#endif
|
|
|
|
/* action !!! */
|
|
if (dist > range) {
|
|
/* make our pixel gray-level */
|
|
rgb[0] = rgb[1] = rgb[2] = 0.0;
|
|
// (rgb[0] + rgb[1] + rgb[2]) / 3.0;
|
|
on++;
|
|
}
|
|
else {
|
|
/* the easy part : do nothing */
|
|
off++;
|
|
}
|
|
|
|
fimg_put_rgb(pdst, x, y, rgb);
|
|
|
|
/* MUST BE MORE CREATIVE HERE !!! */
|
|
}
|
|
}
|
|
|
|
fprintf(stderr, "on %d off %d\n", on, off);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
|