Re: camera colour spaces
Re: camera colour spaces
- Subject: Re: camera colour spaces
- From: Nov06 <email@hidden>
- Date: Fri, 7 Mar 2008 23:17:24 +0100
On 7 Mar 2008, at 21:58, Nov06 wrote:
[....] that raw converters use a camera model specific profile of
the sensor when they do their conversion into their internal space.
[...] Adobe's DNG converter does something similar to raw
converters. And interesting question would be what the 'internal
colour space' of DNG files is (and possible it's rather well know,
and just not by me).
Did some googling, and it seems I'm possibly wrong about DNGs.
www.adobe.com/products/dng/pdfs/DNG_primer_manufacturers.pdf states:
"Color space: DNG files are stored in a linear, nonwhite-balanced
color space (usually the native color space of the camera). "
Furthermore, www.adobe.com/products/dng/pdfs/dng_spec.pdf describes a
"a transform from camera color space coordinates to XYZ coordinates"
using a 'ColorMatrix' , a 'CameraCalibration', and an 'AnalogBalance'
tag which seems to suggest that the DNG specifications allow for a
conversion from the camera space to XYZ but this conversion is not
done when creating the DNG file but by the raw converter.
But all this means that these tags contain (or can contain)
information which defines the color space a specific camera writes
its raw data into.
Markus
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