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32-bit support #13

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roniemartinez opened this issue May 31, 2013 · 1 comment
Open

32-bit support #13

roniemartinez opened this issue May 31, 2013 · 1 comment
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bug enhancement help wanted

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@roniemartinez
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I am having problem converting 32-bit depth into 8-bit depth. It seems that I can get the image's "silhouette" using the formula
value_8bit = value_32bit * (qPow (2, 8) - 1) / (qPow(2, 32) - 1)

But if I multiply it again with (qPow (2,8) -1) or 255, the image is almost close, at least at "grayscale" mode. I can't find any references on the conversion.
@roniemartinez
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Unfortunately, I was wrong. Just found out that 32-bit depth psd is HDRI and needs "tone mapping". I can't find any "lightweight' library.

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@roniemartinez