[argyllcms] Re: profiling camera
- From: Iliah Borg <ib@xxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sat, 6 Aug 2011 09:15:55 -0400
Hi Nino
Shoot the target, rotate the camera and shoot again. Compute the profiles from
both shots and assign both profiles to some synthetic colour target. Compare
the results.
On Aug 5, 2011, at 11:20 AM, nino loss wrote:
> I do that with all body lens combos. C1 does good analyses. The target is
> very evenly lit. I checked that in C1 too. The spot readouts showed almost
> identical values all over the target. Metamerism should not be an issue with
> a ColorChecker, I think. Still, I would like to know what causes this.
> nino
>
> On 8/5/2011 10:09 AM, Nikolay Pokhilchenko 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 metamerism phenomenon.
>> You can check uniformity of target illumination and lenses by shooting clean
>> white paper sheet in place of target.
--
Iliah Borg
ib@xxxxxxxxxxx
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