Hi :)

Paul Miller wrote:

> Okay, I'm not really trying to do proofing. I'm trying to do the image 
> profile -> working space -> monitor space in one step. Technically, I 
> should probably be doing file profile->working profile during load, then 
> working -> monitor during display, but I thought I'd just save a step 
> and do it all at once.

Well that's an interesting idea, and I can't think of any reason why it 
shouldn't work - so when you say it seems to have no effect, what 
results are you expecting to see, and what are you actually getting?

Unless your working space profile has a smaller gamut than that of your 
source image (or a different white point, and you're using 
absolute-colorimetric) then you wouldn't expect to see any significant 
change in the image.

Oh - and it's worth verifying that you're providing the profiles in the 
right order - that trips up more than a few people!
The first profile should be that of the image, the second should be that 
of the monitor, and the third should be that of the device being 
simulated - the working space in your case.

> Should I be using cmsCreateMultipleProfileTransform() instead, or really 
> break it down into two separate transforms, one during load and one 
> during display?

In theory any of the three should work.

If you're keeping your source image in its native space and building a 
transform specifically for it, is there any special reason you don't 
want to transform directly from source -> monitor profiles?

All the best,
--
Alastair M. Robinson


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