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improved color mapping algorithm

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Blendi
2026-05-01 14:39:37 +02:00
parent dff8506d50
commit db30cf4fff
1 changed files with 1 additions and 4 deletions
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src/neonucleus.c
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@@ -2927,9 +2927,6 @@ double nn_colorLuminance(int color) {
// Credit to Blendi for writing this, the old algorithm based off luminance gave bad results // Credit to Blendi for writing this, the old algorithm based off luminance gave bad results
static double nn_colorDistance(int a, int b) { static double nn_colorDistance(int a, int b) {
// double n = nn_colorLuminance(a) - nn_colorLuminance(b);
// if(n < 0) n = -n;
double ar,ag,ab; double ar,ag,ab;
double br,bg,bb; double br,bg,bb;
@@ -2938,7 +2935,7 @@ static double nn_colorDistance(int a, int b) {
double dr = ar-br, dg = ag-bg, db = ab-bb; double dr = ar-br, dg = ag-bg, db = ab-bb;
return ((dr < 0) ? -dr : dr) + ((dg < 0) ? -dg : dg) + ((db < 0) ? -db : db); return 0.2126 * dr*dr + 0.7152 * dg*dg + 0.0722 * db*db;
} }
int nn_mapColor(int color, int *palette, size_t len) { int nn_mapColor(int color, int *palette, size_t len) {