On Tuesday, January 8, 2019 3:57:34 PM CET Jim Robinson wrote:
> Perhaps using sRGB as the input color profile does make some sense.
> Darktable/rawspeed would I think normally demosaic the raw file into its
> internal color space (RGB). Using sRGB as the input color profile means
> that no remapping occurs after demosaicing, and so we have the image in the
> intended linear color space. Or maybe I am talking rubbish so I will shut
> up now.
The camera captures RAW in RGB. sRGB is a subset of RGB it is small in what
colors can be displayed. To display all colors you need to map colors out of
gamut to in gamut colors. Linear Rec 2020 RGB is much bigger than sRGB. We
want more color information for calibration normally. However for vignetting
it doesn't really matter becaus in the end we have a grayscale picture.
However it could be also an issue with your image. Are you sure that your shot
is exposed correctly?
Andreas
--
Andreas Schneider a...@cryptomilk.org
GPG-ID: 8DFF53E18F2ABC8D8F3C92237EE0FC4DCC014E3D
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