Update GilbertCurve.cpp

mcychan · May 13, 2024 · 4eaabb3 · 4eaabb3
1 parent 24cfdd5
commit 4eaabb3
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/nQuantCpp/GilbertCurve.cpp b/nQuantCpp/GilbertCurve.cpp
@@ -127,7 +127,7 @@ namespace Peano
 				m_lookup[offset] = m_ditherFn(m_pPalette, m_nMaxColor, c2.GetValue(), bidx) + 1;
 			qPixelIndex = m_lookup[offset] - 1;
 
-			if (m_saliencies != nullptr && CIELABConvertor::Y_Diff(pixel, c2) > m_nMaxColor - margin) {
+			if (m_saliencies != nullptr && CIELABConvertor::Y_Diff(pixel, c2) > max(1, m_nMaxColor - margin)) {
 				auto strength = 1 / 3.0f;
 				c2 = BlueNoise::diffuse(pixel, m_pPalette[qPixelIndex], 1.0f / m_saliencies[bidx], strength, x, y);
 				qPixelIndex = m_ditherFn(m_pPalette, m_nMaxColor, c2.GetValue(), bidx);