Bibliothèque de traitements d'images en virgule flottante.
http://la.buvette.org/photos/cumul/
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284 lines
6.2 KiB
284 lines
6.2 KiB
/* |
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* programme de test pour |
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* les fonctions de base. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.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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int verbosity; |
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/* ---------------------------------------------------------------- */ |
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int essai_normalize(void) |
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{ |
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FloatImg A; |
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float val; |
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int foo; |
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foo = fimg_create(&A, 512, 512, FIMG_TYPE_RGB); |
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if (foo) { |
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fprintf(stderr, "%s err create A %d\n", __func__, foo); |
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return foo; |
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} |
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fimg_drand48(&A, 255.0); |
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val = fimg_get_maxvalue(&A); |
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fprintf(stderr, "BEFORE max pixel %f\n", val); |
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A.fval = 255.0; A.count = 1; |
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foo = fimg_normalize(&A, 1.0, 0); |
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if (foo) { |
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fprintf(stderr, "%s err normalize A %d\n", __func__, foo); |
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return foo; |
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} |
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val = fimg_get_maxvalue(&A); |
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fprintf(stderr, "AFTER max pixel %f\n", val); |
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fimg_destroy(&A); |
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return 0; |
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} |
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/* ---------------------------------------------------------------- */ |
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#define WI 1024 |
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#define HI 768 |
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#define KDEG 3.141592654 /* secret magic number */ |
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int essai_interpolate(int k) |
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{ |
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FloatImg A, B, C; |
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int foo, idx; |
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char ligne[200]; |
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float fval, minmax[6]; |
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foo = fimg_create(&A, WI, HI, FIMG_TYPE_RGB); |
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if (foo) { |
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fprintf(stderr, "%s err create A %d\n", __func__, foo); |
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return foo; |
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} |
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fimg_hdeg_a(&A, KDEG); |
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foo = fimg_create(&B, WI, HI, FIMG_TYPE_RGB); |
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if (foo) { |
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fprintf(stderr, "%s err create B %d\n", __func__, foo); |
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return foo; |
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} |
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fimg_vdeg_a(&B, KDEG); |
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foo = fimg_create(&C, WI, HI, FIMG_TYPE_RGB); |
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if (foo) { |
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fprintf(stderr, "%s err create C %d\n", __func__, foo); |
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return foo; |
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} |
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#define NB 16 |
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for (idx=0; idx<NB; idx++) { |
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fval = (float)idx / (float)NB; |
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if (verbosity) fprintf(stderr, "%4d %f\n", idx, fval); |
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foo = fimg_interpolate(&A, &B, &C, fval); |
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if (foo) { |
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fprintf(stderr, "%s err interpolate %d\n", __func__, foo); |
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return foo; |
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} |
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sprintf(ligne, "polate-%02d.pnm", idx); |
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foo = fimg_save_as_pnm(&C, ligne, 0); |
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} |
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/* |
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$ convert -delay 10 polate-* foo.gif ; animate foo.gif |
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*/ |
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fimg_destroy(&A); fimg_destroy(&B); fimg_destroy(&C); |
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return 0; |
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} |
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/* ---------------------------------------------------------------- */ |
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int essai_2gray(FloatImg *picz, char *outname) |
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{ |
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int foo; |
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FloatImg gray; |
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fprintf(stderr, ">>> %s ( %p '%s' )\n", __func__, picz, outname); |
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foo = fimg_create(&gray, picz->width, picz->height, FIMG_TYPE_GRAY); |
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if (foo) { |
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fprintf(stderr, "%s : err %d on fimg create\n", __func__, foo); |
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exit(1); |
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} |
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foo = fimg_mk_gray_from(picz, &gray, 0); |
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if (foo) { |
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fprintf(stderr, "%s : err %d on fimg mk_gray_from\n", __func__, foo); |
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exit(1); |
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} |
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foo = fimg_save_as_pnm(&gray, outname, 0); |
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if (foo) { |
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fprintf(stderr, "%s : err %d on save_as_pnm\n", __func__, foo); |
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exit(1); |
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} |
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fimg_destroy(&gray); |
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return 0; |
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} |
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/* ---------------------------------------------------------------- */ |
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#define TAILLE 1024 |
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int essai_clone_et_copy(int unused) |
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{ |
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FloatImg A, B, C; |
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int foo; |
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foo = fimg_create(&A, TAILLE, TAILLE, FIMG_TYPE_RGB); |
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if (foo) { |
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fprintf(stderr, "%s err create A %d\n", __func__, foo); |
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return foo; |
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} |
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foo = fimg_draw_something(&A); |
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if (foo) { |
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fprintf(stderr, "%s err drawing A %d\n", __func__, foo); |
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return foo; |
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} |
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foo = fimg_save_as_pnm(&A, "A.pnm", 0); |
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if (foo) { |
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fprintf(stderr, "%s : err %d on save_as_pnm\n", __func__, foo); |
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exit(1); |
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} |
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foo = fimg_clone(&A, &B, 1); |
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if (foo) { |
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fprintf(stderr, "%s err clone B %d\n", __func__, foo); |
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return foo; |
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} |
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foo = fimg_create(&C, TAILLE, TAILLE, FIMG_TYPE_RGB); |
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if (foo) { |
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fprintf(stderr, "%s err create A %d\n", __func__, foo); |
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return foo; |
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} |
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foo = fimg_copy_data(&A, &C); |
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if (foo) { |
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fprintf(stderr, "%s err copydata %d\n", __func__, foo); |
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return foo; |
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} |
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foo = fimg_save_as_pnm(&C, "C.pnm", 0); |
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fimg_destroy(&A); fimg_destroy(&B); fimg_destroy(&C); |
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return 0; |
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} |
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#undef TAILLE |
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/* ---------------------------------------------------------------- */ |
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int essai_get_values(char *fname) |
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{ |
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int foo; |
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FloatImg dessin; |
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float vals[6]; |
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foo = fimg_create_from_dump(fname, &dessin); |
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if (foo) { |
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fprintf(stderr, "in %s, error %d loading '%s'\n", |
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__func__, foo, fname); |
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return foo; |
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} |
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foo = fimg_get_minmax_rgb(&dessin, vals); |
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if (foo) { |
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fprintf(stderr, "%s: err %d on fimg_get_minmax_rgb\n", |
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__func__, foo); |
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return foo; |
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} |
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for (foo=0; foo<6; foo++) { |
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fprintf(stderr, "%7d %17.6g\n", foo, vals[foo]); |
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} |
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return -1; |
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} |
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/* ---------------------------------------------------------------- */ |
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int essai_contraste(char *fname) |
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{ |
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int foo; |
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FloatImg dessin, copy; |
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double maxi; |
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foo = fimg_create_from_dump(fname, &dessin); |
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if (foo) { |
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fprintf(stderr, "in %s, error %d loading '%s'\n", |
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__func__, foo, fname); |
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return foo; |
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} |
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foo = fimg_clone(&dessin, ©, 0); |
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maxi = (double)fimg_get_maxvalue(&dessin); |
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fprintf(stderr, "image source valeur maxi = %f\n", maxi); |
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fimg_power_2(&dessin, ©, maxi); |
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maxi = (double)fimg_get_maxvalue(©); |
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fprintf(stderr, "apres power_2 valeur maxi = %f\n", maxi); |
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fimg_save_as_pnm(©, "power2.pnm", 0); |
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fimg_square_root(&dessin, ©, maxi); |
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maxi = (double)fimg_get_maxvalue(©); |
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fprintf(stderr, "apres square_root valeur maxi = %f\n", maxi); |
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fimg_save_as_pnm(©, "squareroot.pnm", 0); |
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fimg_cos_01(&dessin, ©, maxi); |
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maxi = (double)fimg_get_maxvalue(©); |
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fprintf(stderr, "apres cos 01 valeur maxi = %f\n", maxi); |
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fimg_save_as_pnm(©, "cos_01.pnm", 0); |
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fimg_cos_010(&dessin, ©, maxi); |
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maxi = (double)fimg_get_maxvalue(©); |
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fprintf(stderr, "apres cos 010 valeur maxi = %f\n", maxi); |
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fimg_save_as_pnm(©, "cos_010.pnm", 0); |
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fimg_destroy(&dessin); fimg_destroy(©); |
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return 0; |
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} |
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/* ---------------------------------------------------------------- */ |
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int main(int argc, char *argv[]) |
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{ |
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int foo, opt; |
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// char outname[100]; |
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int gray = 0; |
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while ((opt = getopt(argc, argv, "gn:v")) != -1) { |
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switch(opt) { |
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case 'g': gray++; break; |
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case 'n': foo=atoi(optarg); break; |
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case 'v': verbosity++; break; |
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default: |
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fprintf(stderr, "%s: oh, %c is a bad opt.\n", |
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argv[0], opt); |
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exit(5); |
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} |
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} |
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if (verbosity) fimg_print_version(0); |
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// foo = essai_normalize(); |
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// fprintf(stderr, "retour essai normalize -> %d\n", foo); |
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// foo = essai_contraste("quux.fimg"); |
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// fprintf(stderr, "retour essai contraste -> %d\n", foo); |
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// foo = essai_clone_et_copy(0); |
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// fprintf(stderr, "retour essai clone'n'copy -> %d\n", foo); |
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foo = essai_get_values("quux.fimg"); |
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fprintf(stderr, "retour essai interpolate -> %d\n", foo); |
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return 0; |
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}
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