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Fix some edge cases when stretch

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This commit is contained in:
Dušan Poizl
2024-01-18 16:10:11 +01:00
parent 428f9c360a
commit e5f425ff8d
1 changed files with 7 additions and 4 deletions
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stretchtoolbar.cpp
+7 -4
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@@ -120,12 +120,15 @@ void StretchToolbar::stretchImage(Image *img)
mad = stats.m_mad[i]; mad = stats.m_mad[i];
max = stats.m_max[i]; max = stats.m_max[i];
median /= img->rawImage()->norm(); median /= img->rawImage()->norm();
bool a = median > 0.5 ? true : false;
mad /= img->rawImage()->norm(); mad /= img->rawImage()->norm();
max /= img->rawImage()->norm(); max = 1.0f;// /= img->rawImage()->norm();
float bp = median + mad * BLACK_POINT_SIGMA * MAD_TO_SIGMA; float bp = a || mad == 0.0f ? 0.0f : std::clamp(median + mad * BLACK_POINT_SIGMA * MAD_TO_SIGMA, 0.0, 1.0);
float mid = MTF(median - bp, TARGET_BACKGROUND); if(a && mad != 0.0f)
max = std::clamp(median - mad * BLACK_POINT_SIGMA * MAD_TO_SIGMA, 0.0, 1.0);
float mid = !a ? MTF(median - bp, TARGET_BACKGROUND) : MTF(TARGET_BACKGROUND, max - median);
m_mtfParam.blackPoint[i-o] = bp; m_mtfParam.blackPoint[i-o] = bp;
m_mtfParam.midPoint[i-o] = mid / max; m_mtfParam.midPoint[i-o] = mid;// / max;
m_mtfParam.whitePoint[i-o] = max; m_mtfParam.whitePoint[i-o] = max;
bp2 += bp; bp2 += bp;
mid2 += mid; mid2 += mid;