[Lcms-user] May be there is a bug

[Andrea G. <da...@ti...>]

Hi,

I tested the creation and use of a Lab profile with different white points.

I tried transicc by using the default illuminant in the following way:

transicc -i*Lab
LittleCMS ColorSpace conversion calculator - 4.2 [LittleCMS 2.04]

Enter values, 'q' to quit
L*? 50
a*? 0
b*? 50

R=135.1773 G=116.7732 B=14.9372

Then I tried transicc by using the D65 illuminant and I got this

transicc -i*LabD65
LittleCMS ColorSpace conversion calculator - 4.2 [LittleCMS 2.04]

Enter values, 'q' to quit
L*? 50
a*? 0
b*? 50

R=135.1773 G=116.7732 B=14.9372

Is this correct?

I also tried tificc by translating a 16-bit Lab image to sRGB using this 
command lines:

tificc -i*Lab MyLabImage.tif D50.tif
tificc -i*LabD65 MyLabImage.tif D65.tif

but comparing D50.tif and D65.tif  are identical. (I used a binary-file 
compare utility)

I've done something wrong or there is a bug somewhere?

Thanks a lot
Andrea