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Don't apply histogram matching when thumb has less than 19200 pixels

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heckflosse
2019-03-19 15:09:18 +01:00
parent 209cc16e0d
commit d4d535720d
1 changed files with 4 additions and 1 deletions
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5
rtengine/histmatching.cc
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@@ -289,7 +289,10 @@ void RawImageSource::getAutoMatchedToneCurve(const ColorManagementParams &cp, st
histMatchingCache = outCurve; histMatchingCache = outCurve;
*histMatchingParams = cp; *histMatchingParams = cp;
return; return;
} else if (w * 32 < fw) { } else if (w * 32 < fw || w * h < 19200) {
// Some cameras have extremely small thumbs, for example Canon PowerShot A3100 IS has 128x96 thumbs.
// For them we skip histogram matching.
// With 160x120 thumbs from RICOH GR DIGITAL 2 it works fine, so we use 19200 as limit.
if (settings->verbose) { if (settings->verbose) {
std::cout << "histogram matching: the embedded thumbnail is too small: " << w << "x" << h << std::endl; std::cout << "histogram matching: the embedded thumbnail is too small: " << w << "x" << h << std::endl;
} }