I can not understand what I can not understand what 'demosaic RAW' is. If you just need 'source' (unaltered) values from sensor/raw file, it is much better to access imgdata.rawdata.raw_image directly. dcraw_process() means multiple processing stages. Your parameters looks like you need unaltered image. -- Alex Tutubalin @LibRaw LLC reply
I can not understand what 'demosaic RAW' is.
If you just need 'source' (unaltered) values from sensor/raw file, it is much better to access imgdata.rawdata.raw_image directly.
dcraw_process() means multiple processing stages. Your parameters looks like you need unaltered image.