Re: Color matching

Hi,

You are reading too much....Nothing here has anything to do with Chromatic Adaptation.

You can certainly generate a look up table to map white point and gamma so that your test display can match your reference display. It is highly unlikely that you can match the specific luminance values with an RGB lut alone. If the Primary (R,G,B) chromaticities are very different, then you will not be able to match saturated colors, but you should be able to match the greyscale response quite well.

The method is far too complex to describe in any useful manner on the newsgroup... I've written software to do this, but it is proprietary.

You might want to go www.brucelindbloom.com and look around at his articles.

Regards,
Tom


Hello,

I've been trying to get an LCD TV panel (Panel A) at its native
setting to match the color temperature and profile of another
different TV panel (reference). I have access and means to control the
color LUTs for the panel (Panel A).

I also have been able to get Lvxy measurements for both panels for R,
G and B color planes for all intensity values (0-255). However,
adjustments to color, or gamma that might have been performed on the
reference panel are unknown.

With these factors, i have the following questions...

1) Do i have sufficient information to be able to match panel A to the
reference panel both in terms of the color temperature as well as
color shifts?

2) If so, how do i go about it?
I have tried to match the white point of the panels by using the
Bradford transformation, but i'm not sure if i;m using that correctly
or if that is the way to go. Morover i'm not sure of the reference
illuminant or the RGB space being used...

3) In addition if i just want to reach a reference color temp, say
D65, how would i go about it?

I would appreciate it a lot if someone would educate me on this. The
documents and literature i've been referring to on this have just
added to the confusion. I hear about Chromatic Adaptation, Von Kries
and all that, but i'm not sure if those apply to the problem at hand.

Thanks
SR

.

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