/* * Sobel4 new 26 avril 2007 - Fonsegrives * ====== =============================== */ #include #include #include #include "tthimage.h" /*::------------------------------------------------------------------::*/ int Image_filtre_Sobel_4(Image_Desc *src, Image_Desc *dst, int rotation) { static int Sobel[] = { 1, 2, 1, 0, 0, 0, -1, -2, -1, 1, 128 }; int filtre[11], foo; Image_Desc *tmp[4]; int x, y, r, g, b; memcpy(filtre, Sobel, 11*sizeof(int)); for (foo=0; foo<4; foo++) { fprintf(stderr, "sobel4: pass %d\n", foo); if (NULL == (tmp[foo] = Image_clone(src, 0))) { fprintf(stderr,"Sobel 4: no memory, aborting\n"); abort(); } Image_convolueur_2(src, tmp[foo], filtre, "rgb"); Image_rotate_filtre(filtre); Image_rotate_filtre(filtre); } for (x=0; xwidth; x++) { for (y=0; yheight; y++) { r = ( tmp[0]->Rpix[y][x] + tmp[1]->Rpix[y][x] + tmp[2]->Rpix[y][x] + tmp[3]->Rpix[y][x]) / 4; g = ( tmp[0]->Gpix[y][x] + tmp[1]->Gpix[y][x] + tmp[2]->Gpix[y][x] + tmp[3]->Gpix[y][x]) / 4; b = ( tmp[0]->Bpix[y][x] + tmp[1]->Bpix[y][x] + tmp[2]->Bpix[y][x] + tmp[3]->Bpix[y][x]) / 4; dst->Rpix[y][x] = r; dst->Gpix[y][x] = g; dst->Bpix[y][x] = b; } } dst->modified = 1; for (foo=0; foo<4; foo++) { #if DEBUG_LEVEL > 1 fprintf(stderr, "%s: freeing %d\n", __func__, foo); #endif Image_DeAllocate(tmp[foo]); free(tmp[foo]); } return FUNC_NOT_FINISH; } /*::------------------------------------------------------------------::*/ /*::------------------------------------------------------------------::*/ /*::------------------------------------------------------------------::*/