[argyllcms] Re: Faking the white point in camera calibration
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Wed, 31 Aug 2011 19:09:48 +1000
Stephen T wrote:
> Now, rather than editing the wtpt tag, maybe I can edit the .ti3 file and
> then profile that? I
> am thinking to edit the XYZ_X XYZ_Y XYZ_Z and RGB_R RGB_G RGB_B data for GS00
> to make everything
> neutral. I can make the reference Lab neutral by setting a and b to zero.
> Then I can convert
> these numbers to XYZ. For the camera, I can use the average of the measured
> values and set
> R=G=B.
>
> Is this safe or would it make problems for colprof and screw up the model
> fitting?
That may work, as long as the change in the white patch is not too great.
Graeme Gill.
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