Don't apply histogram matching when thumb has less than 19200 pixels
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@@ -289,7 +289,10 @@ void RawImageSource::getAutoMatchedToneCurve(const ColorManagementParams &cp, st
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histMatchingCache = outCurve;
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*histMatchingParams = cp;
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return;
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} else if (w * 32 < fw) {
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} else if (w * 32 < fw || w * h < 19200) {
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// Some cameras have extremely small thumbs, for example Canon PowerShot A3100 IS has 128x96 thumbs.
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// For them we skip histogram matching.
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// With 160x120 thumbs from RICOH GR DIGITAL 2 it works fine, so we use 19200 as limit.
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if (settings->verbose) {
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std::cout << "histogram matching: the embedded thumbnail is too small: " << w << "x" << h << std::endl;
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}
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