Help required: Getting primary illuminants and white point from ICC file

[Lars Tore Gustavsen]

On Tue, Dec 1, 2009 at 3:58 PM, Richard Hughes <hughsient at gmail.com> wrote:
> Attached is the new widget I've just added to gnome-color-manager git
> master. It allows us to show the user a preview of the gamut range of
> the profile in a graphical way, much like OSX does.
>
> You should be able to see the lightly shaded section. At the moment
> I've hardcoded the CIE REC 709 x-y values, but of course it's easy to
> change when put into GcmPrefs.
>
> So, the point of this email: I wanted to get the CIE x and y
> coordinates (or XYZ of course) of the three primary illuminants and
> the x and y coordinates of the white point from the device ICC
> profile.
>
> Is there an easy way to extract these end-point values from the ICC
> file? I guess mediaWhitePointTag is the latter half of the problem,
> but I'm not sure how to deal with the LUT values. Ideas welcome.
> Thanks.
>
> Richard.
>

What about
iccdump -v3 -t wtpt -t bkpt -t rXYZ -t gXYZ -t bXYZ  myprofile.icc

Lars Tore Gustavsen