Earlier today I wrote: *I'm hoping that someone here can help me out. I'm using v1.17 of lcms (can't switch to v2 yet but that is on the schedule...) and have been exceptionally happy with it.
My latest task is to add a tonal adjustment to my image after it has been processed by LittleCMS. It seems to me that the most efficient way to do this is to modify the B2A* tables in the ICC profile and combine my tonal adjustment with the ICC profile's tonal adjustment. * I've been reading the lcms V2 documents and I'm wondering if I should take a different approach. In particular it seems to be I could make a linear transform profile with cmsCreateProfilePlaceholder() and then adding a tabulated tonal curve to it with my table based tone data. I am a bit concerned that the cmsCreateProfilePlaceholder() doc says I need to add the required tags, so building this linear profile may be a ton of work! I would then need to chain these together somehow, so instead of making my transform with src/dest I would make it with src/dest/linear-with-tone. In theory this sounds like it should work. I like it in that I'm dealing with higher level concepts but who knows? I may be completely wrong here. I appreciate any advice. Thank you. John
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