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The DNG CFAPattern describes the top-left of the ActiveArea, but RawImage::cfa is sensor-anchored (the crop to the active area shifts it by the area's offset). The DNG reader now moves the tag's pattern out to the sensor origin, and the DNG writer states the pattern back at the ActiveArea. A DNG whose area starts on an odd row or column (the Canon EOS 60D DNG of #1086, top 51) no longer reads RGGB as GBRG.