fix(yuv): set luma offset default to 0 for proper scale behavior#679
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for13to1 wants to merge 1 commit into
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fix(yuv): set luma offset default to 0 for proper scale behavior#679for13to1 wants to merge 1 commit into
for13to1 wants to merge 1 commit into
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When luma offset is 125 (limited range center), adjusting scale only changes contrast without affecting overall brightness. Setting offset to 0 ensures scale adjustments produce visible brightness changes.
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fix(yuv): set luma offset default to 0 for proper scale behavior
Problem
Luma scale adjustment has no visible effect on image brightness.
Root Cause
Default Luma offset is 125 (limited range center). Transform formula
newValue = (value - offset) * scale + offsetuses offset as pivot, so pixels near 125 are minimally affected.Solution
Changed default Luma offset from 125 to 0, so scale adjustments affect all pixels proportionally.
Changes
videoHandlerYUV.cpp: Updated 3 locations (constructor, setSrcPixelFormat, calculateDifference)Effect