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add cos010 to tga_equalize

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tTh
2024-04-09 22:20:46 +02:00
parent 96ddcfccaf
commit d9d2db45b0
3 changed files with 37 additions and 26 deletions
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45
Lib/contrast.c
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@@ -10,48 +10,53 @@
/*::------------------------------------------------------------------::*/
/*
* new: Fri Sep 15 20:18:35 UTC 2023
* inspired by the sam func in FloatImg
* inspired by the same func in FloatImg
*/
int Image_egalise_cos01(Image_Desc *source, Image_Desc *but, int k)
{
int lut[256], uc;
int idx, foo;
/* int x, y, pix; */
int lut[256], uc, idx, foo;
float fidx;
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__,
source, but, k);
#endif
if ( (foo=Image_compare_desc(source, but)) ) {
fprintf(stderr, "%s: images not compatible, %d\n", __func__, foo);
return foo;
}
for (idx=0; idx<256; idx++) {
fidx = (float)idx / 255.0;
uc = (unsigned char)(255.0*(0.5 - 0.5 * cos(3.141592654*fidx)));
lut[idx] = uc;
/* printf("%7d %7d\n", idx, uc); */
}
Image_LUT_mono(source, but, lut);
/*
* old original code, replaced...
*
for (y=0; y<source->height; y++) {
for (x=0; x<source->width; x++) {
return FUNC_IS_BETA;
}
/*::------------------------------------------------------------------::*/
int Image_egalise_cos010(Image_Desc *source, Image_Desc *but, int k)
{
int lut[256], uc, idx, foo;
float fidx;
pix = source->Rpix[y][x];
but->Rpix[y][x] = lut[pix];
pix = source->Gpix[y][x];
but->Gpix[y][x] = lut[pix];
pix = source->Bpix[y][x];
but->Bpix[y][x] = lut[pix];
#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__,
source, but, k);
#endif
}
if ( (foo=Image_compare_desc(source, but)) ) {
fprintf(stderr, "%s: images not compatible, %d\n", __func__, foo);
return foo;
}
for (idx=0; idx<256; idx++) {
fidx = (float)idx / 255.0;
uc = (unsigned char)(255.0*(0.5 - 0.5 * cos(3.141592654*fidx*2.0)));
lut[idx] = uc;
/* printf("%7d %7d\n", idx, uc); */
}
*
* ... by a func from 'calculs.c'
*/
Image_LUT_mono(source, but, lut);
return FUNC_IS_BETA;