I am author of http://code.google.com/p/delaboratory/
major version will be released soon, and after it I may think about new features, one of them is ability to import RAW files
I am just checking is libraw good candidate for that,
I looked into API but couldn't find answer to my question
I understand that standard output is in RGB, but is there any way to export image into LAB colorspace to avoid color profile dependency?
LibRaw does not contains
LibRaw does not contains complete color library.
You may consider use of lcms2 and try to set Lab as output profile.
-- Alex Tutubalin @LibRaw LLC