83 рядки
1.7 KiB
C
83 рядки
1.7 KiB
C
/*
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* metriques.c
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "../floatimg.h"
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#include "metriques.h"
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extern int verbosity;
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/* -------------------------------------------------------------- */
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/*
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* premier essai...
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*/
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int get_float_metric_a(FloatImg *pimg, float *where)
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{
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float means[4]; /* four values : R G B A */
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int foo;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %f %d )\n", __func__, pimg, where, whot);
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#endif
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foo = fimg_meanvalues(pimg, means);
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if (foo) {
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fprintf(stderr, "fatal error in %s\n", __func__);
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exit(1);
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}
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*where = means[0] + means[1] + means[2];
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return 0;
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}
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/* -------------------------------------------------------------- */
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int get_float_metric_b(FloatImg *pimg, float *where)
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{
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int idx, size, nbre;
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double adder;
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adder = 0.0;
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nbre = 0;
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size = pimg->width * pimg->height;
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for (idx=20; idx < size; idx+=42) {
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adder += (double)pimg->R[idx];
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nbre++;
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}
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*where = (float)(adder/(nbre+1));
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return 0;
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}
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/* -------------------------------------------------------------- */
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int get_float_metric_from_file(char *fname, float *where, int mode)
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{
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FloatImg image;
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int foo;
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float fval;
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foo = fimg_create_from_dump(fname, &image);
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if (foo) {
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fprintf(stderr, "%s: err %d loading %s\n", __func__, foo, fname);
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return foo;
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}
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fval = -1.0; /* sensible default value */
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switch (mode) {
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case 0: case 1:
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foo = get_float_metric_a(&image, &fval);
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break;
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case 2:
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foo = get_float_metric_b(&image, &fval);
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break;
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default:
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fprintf(stderr, "%s: method %d invalid\n",
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__func__, mode);
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exit(1);
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break; /* not reached */
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}
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*where = fval;
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fimg_destroy(&image);
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return 0;
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}
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/* -------------------------------------------------------------- */
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