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better plotting

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tth 2020-09-04 06:18:59 +02:00
parent 711e54fe43
commit 6228533479
2 changed files with 15 additions and 8 deletions
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22
funcs/histogram.c
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@ -18,7 +18,9 @@ float maxval;
int x, y, idx; int x, y, idx;
float rgb[3], moy; float rgb[3], moy;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__, src, ghist, sz); fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__, src, ghist, sz);
#endif
maxval = fimg_get_maxvalue(src); maxval = fimg_get_maxvalue(src);
@ -46,7 +48,7 @@ return -66;
} }
/* --------------------------------------------------------------------- */ /* --------------------------------------------------------------------- */
#define NSLICES 999 #define NSLICES 1000
int fimg_essai_histo(FloatImg *src, char *outpic, int k) int fimg_essai_histo(FloatImg *src, char *outpic, int k)
{ {
@ -60,14 +62,20 @@ memset(histo, 0, NSLICES*sizeof(long));
foo = fimg_calcul_histo(src, histo, NSLICES); foo = fimg_calcul_histo(src, histo, NSLICES);
for (foo=0; foo<NSLICES; foo++) { // for (foo=0; foo<NSLICES; foo++) {
printf("%7d %ld\n", foo, histo[foo]); // printf("%7d %ld\n", foo, histo[foo]);
} // }
pipe = popen("gnuplot", "w"); pipe = popen("gnuplot", "w");
fprintf(pipe, "set term png size 1000,400\n"); fprintf(pipe, "set term png size 1024,512\n");
fprintf(pipe, "set output \"histo.png\"\n"); fprintf(pipe, "set grid\n");
fprintf(pipe, "plot 'toto' with lines\n"); fprintf(pipe, "set output \"%s\"\n", outpic);
fprintf(pipe, "plot '/dev/stdin' with lines\n");
for (foo=0; foo<NSLICES; foo++) {
fprintf(pipe, "%d %ld\n", foo, histo[foo]);
}
fclose(pipe); fclose(pipe);

1
funcs/t.c
View File

@ -405,7 +405,6 @@ return 0;
/* func in histogram.c */ /* func in histogram.c */
int fimg_essai_histo(FloatImg *src, char *outpic, int k); int fimg_essai_histo(FloatImg *src, char *outpic, int k);
int essai_histogramme(char *fname, int k) int essai_histogramme(char *fname, int k)
{ {
FloatImg fimg; FloatImg fimg;