How to convert L*a*b value to RGB value?

Question

How to convert L*a*b value to RGB value?

Answer 1

http://kuler.adobe.com/



click on 'Create'



Enter your LAB numbers under one of the color blocks. The RGB color numbers will change above correspondingly.



This is also a pretty lovely tool for color in general! (despite the fact that it makes me install flash player 9 every time, no matter how many times I install it--at least it only takes a second)

Answer 2

Convert Lab To Rgb

Answer 3

Well, it's not so simple.

Here's what I got from wikipedia:

RGB and CMYK conversions

There are no simple formulas for conversion between RGB or CMYK values and L*a*b*, because the RGB and CMYK color models are device dependent. The RGB or CMYK values first need to be transformed to a specific absolute color space, such as sRGB or Adobe RGB. This adjustment will be device dependent, but the resulting data from the transform will be device independent, allowing data to be transformed to the CIE 1931 color space and then transformed into L*a*b*.







I did, however, find a little conversion script here:





http://www.rags-int-inc.com/PhotoTechStuff/ColorCalculator/

Answer 4

Well, as the poster above me said, there is no formula to directly convert RGB to L*ab.

If you wish to convert it progmatically, I found a site that describes conversion formulas in plain easy to understand language, the process for converting from L*ab to RGB goes like this:

L*ab -> XYZ -> RGB

I'll throw the link in my sources

Answer 5

First of all, What is this L,a,b?