How do I processing RAW images in the same way my camera processes JPEGs?

Started 4 months ago | Questions thread
NAwlins Contrarian Veteran Member • Posts: 7,611
Disagree about raw
2

Camera RAW is unprocessed. The computer software has to do all corrections, including converting the image (commonly a Bayer mosaic) to RGB for all pixels, and applying lens corrections. (Lens corrections typically include distortion and vignetting. Lateral color correction, which gives one type of color fringing, may also be done.)

Jim Kasson (a sometimes-moderator and regular participant at various times in the medium format, Nikon, and Sony forums) has shown pretty well that very few camera 'raw' files are truly raw, and the real question is how much and what type of processing has occurred. The most infamous current cooking of 'raw' files is noise reduction applied to Canon R-series 'raw' files, although in the past other companies have done similar things. Other processing includes, but is not limited to, substituting and interpolating to fill PDAF pixels. So although pretty much any 'raw' is much less cooked than a JPEG, it's rarely actually raw, and the question is what and how much has been done.

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