Use evenly-spaced dithering thresholds for factory LUT (Patryk Radtke)

2026-04-06 19:19:21 +02:00
parent 4200714127
commit 398e973847
2 changed files with 30 additions and 63 deletions
@@ -52,14 +52,13 @@ int adjustPixel(int gray) {

  return gray;
 }
-// Simple quantization without dithering - divide into 4 levels
-// The thresholds are fine-tuned to the X4 display
+// Simple quantization without dithering — evenly-spaced midpoint thresholds for factory LUT
 uint8_t quantizeSimple(int gray) {
-  if (gray < 45) {
+  if (gray < 43) {
    return 0;
-  } else if (gray < 70) {
+  } else if (gray < 128) {
    return 1;
-  } else if (gray < 140) {
+  } else if (gray < 213) {
    return 2;
  } else {
    return 3;