Re: [Lcms-user] White balance

[Dirk <di...@st...>]

Am Montag, 28. Februar 2005 22:18 schrieb Dirk Str=F6ker:
> Hi everybody,
>
>  I have a problem, which might is simple to solve, but in the moment I'm a
> bit confused and can't find a simple answer.
> Before I explain my problem I will give a short description of my setup.
> I'm working with a CCD-camera on a microscope. The color quality of the
> system was very bad, so I did some research, found ICC-profiles, color
> management...and so on (I learned a lot in the past weeks  ;-)  ).
> We bought software from Gretag MacBeth to create profiles for the cameras
> and we were pretty impressed over the results. After that we found
> "littleCMS" and tried to use it to achieve the improved color quality
> directly, which worked fine.
> The problem is, that it is a common technique, to make a so called "white
> balance" on the "illumination", the yellowish ligth of the tungsten halog=
en
> lamp should be white or gray (R=3DG=3DB). I understood the ICC
> color-management-technique in that way, that this is normally done by the
> chromatic adaption tag (often the "Bradford matrix"). This is matrix is
> calculated while creating the profile.
> But not every individual microscope lamp is the same. Some people dim the
> lamp, or the lamp is older... but everyone wants to make the pure lamp
> light gray.
> How can I do this
>
>

Oops, I wasn't ready.

Should I use "cmsCreateRGBProfile" and make a "transform" with the "normal"=
=20
camera profile + the new RGBProfile?

Maybe there is a simple solution and I'm just to blind to see...

I hope my explanations weren't to confusing ;-)



Dirk Str=F6ker