Legacy ImageMagick Discussions Archive

How Lab values are stored? I read that in the last version ImageMagick-6.8.8-Q16, the a* value and b* value are unsigned, but I don't find a correct correlation! For example: in a tiff image with lab colorspace I have L=50 a=-10 b =-10, and pixel->red =34504 pixel->green =28257pixel->blue =30184 ...

Ok, thank you! Let me know when this feature will be ready!

Hi,

David

How can I do this with Magick++, like imageMagick: identify -format %[profile:icc] - verbose test.tif.
I try in different ways but without results!

Thank you

How can I convert a cmyk tiff file to lab tiff, using embedded profiles? Can I manage unknow or absent profiles?
I try: convert -verbose "input_CMYK.tif" -profile "USWebCoatedSWOP.icc" -colorspace LAB "out_LAB.tif", but color convertion is not good.
Regards,
David