Pedro Côrte-Real schrieb am 29.12.2014 um 21:27: > Yeah, rawspeed just can't read this file. It seems to be 16bit data, > marked as RGB but with 4 samples per pixel. So it could be a > strangely encoded bayer pattern except as you found out normal image > viewers open it fine which would suggest normal RGB. No, as it is from a scanner it indeed is RGB. The fourth channel is IR for dust cleaning and saved as alpha channel within the TIF. So I will stick with TIFF. Thanks for discussing this matter.
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