Converting to Lab color mode about aforge HOT 4 OPEN

I'm sorry, it's not defect but enhacement :)

hi,

There are existing c# codes that converts rgb -> ciexyz ->cielab and vice versa.
1.  http://www.easyrgb.com/math.php?MATH=M7#text7
2. http://www.codeproject.com/KB/GDI-plus/colorclass.aspx
3.  http://www.codeproject.com/KB/recipes/colorspace1.aspx

Hi there,

actually, you cannot convert from RGB to CIE L*a*b*, there is no such transform 
(and
anyone telling you otherwise is wrong). The reason for this is that there is no 
such
thing as 'RGB' , it's undefined. You can, however, transform from sRGB to CIE 
XYZ and
CIE Lab, and that's what the links given by Andrew actually refer to (thank you 
for
incling my article btw). Take into account though that very few images on the 
web
actually are sRGB, and don't take your digital camera's word for (they do not 
produce
sRGB images, not by a long stretch!). As an approximation it may do though, but 
if
you want an approximation there is no point going to CIE Lab in the first place 
...