Re: camera colour spaces
Re: camera colour spaces
- Subject: Re: camera colour spaces
- From: "edmund ronald" <email@hidden>
- Date: Fri, 7 Mar 2008 09:10:22 +0100
AFAIK the Canon 1D (sic) is an old pro model but it does allow the
user to upload some tone curves to the camera. The successor 1Ds did
this too, and this feature was widely employed by professionals
wishing to correct for a green cast in images. The same feature is
found in other brands.
http://home.earthlink.net/~ladlueck/Tone Curves.htm
http://www.dgrin.com/archive/index.php/t-4134.html
Edmund
On Thu, Mar 6, 2008 at 2:53 AM, info <email@hidden> wrote:
> Hello,
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> I am curious about how semi professional cameras manage the "colour space " configuration which it imposes on operator's using jpeg format. A student has asked me to look at her Canon D1 which offers five matrix colour settings which produce five different colour interpretations all in sRGB . I shot a Gretag colorchecker using each matrix setting and the results showed all five files had different data. I am trying to discover whether these files have been converted through five different generic input profiles ( or perhaps five different custom rendering intents from a single profile) into srgb, or whether alterations were made to the electronic control signals before conversion and srgb was simply assigned afterwards. In the latter case she would be able to make her own profile which would most likely be larger than srgb. This would allow her to convert her file to a larger work space than srgb and therefore maintain the full spectral sensitivity of her camera.
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> Does anyone know if these cameras actually have built in CMMs and perform in-house colour conversions or are these colour alternatives made before the data is even created?
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> Thanks for any input
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> Paul Lowry
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