[argyllcms] Re: profiling camera

BTW, C1 needs (or any other Raw converter) needs to be set to linear mode if
you want to profile it. Otherwise it overlays an S curve on the data.

On Fri, Aug 5, 2011 at 9:57 AM, edmund ronald <edmundronald@xxxxxxxxx>wrote:

> On Fri, Aug 5, 2011 at 9:09 AM, Nikolay Pokhilchenko 
> <nikolay_po@xxxxxxx>wrote:
>
>> 05.08.2011, 04:18 nino loss wrote:
>>
>> I still get a peak error of 18.381637 and an average of 7.896481 !
>>
>>
>> IMHO, It's OK for camera profiling. This number depends of the uniformity
>> of illumination, of lens and sensor uniformity and metamerismphenomenon.
>> You can check uniformity of target illumination and lenses by shooting
>> clean white paper sheet in place of target.
>>
>
> Yes.
>
> Anyway, there is little point in fully profiling a modern SLR, in my
> experience, they are superbly linearized. What you really need is just to
> establish the primaries, this will perfectly solve even nasty lighting for
> you. The hard part is just getting the Raw data, and writing the profile
> out. The core code is 3 lines, it can be done in anything including
> Javascript and Python.
>
> I know about this because it attracted my attention some years ago and I
> did it all in Matlab, worked perfectly.
>
> Does Argyll provide a way to write out an input  profile with given
> primaries?
>
> Edmund
>
>
>

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