I have the following problem. I have sRGB images that I need to convert to a CMYK with a specific ICC profile.
OK. And you've got this part under control, yes>
After I convert the RGB to a CMYK and insert it to the PDF, the images are reverted (when viewed with Acrobat).
You mean inverted, I believe...
You can fix this by adding the appropriate /Decode array into the image's attributes dictionary.
I read somewhere that Adobe uses the opposite values for CMYK colors than the rest of the world.
Correct.
So, I take the CMYK image and revert it, save it as jpeg
Using what tool? Saving it as JPEG won't help UNLESS you add the correct ADBE tag into the JPEG metadata...
and stick it in the PDF. That looks okay, but (1) images are 'dark', probably because reverting them changes the white point balance (?)
Yes, there are other issues here - and you're trying too hard ;).
and (2) when I copy the image (with Acrobat) into Photoshop, it is reverted.
See comment above about ADBE tag in JPEG.
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