[Lcms-user] White balance

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

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 halogen 
lamp should be white or gray (R=G=B). 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