I am puzzled by a strange phenomenon in Photoshop.
I take an RGB image, and convert to a CMYK output profile, using Rel Col intent *without* black point compensation.
The image, on screen, appears to darken substantially. Most of the image is in-gamut for the destination profile. Checking the L* values of different areas of the image before and after the conversion using the eye dropper tool shows that the L* values are the same - which is what I would expect provided the colour is in-gamut for the output device. But, on screen it looks darker than the RGB version.
Granted I am not using the current version of Photoshop, perhaps this is a bug since squashed. But has anyone else seen this? Is there a reason this should be so?
Matthew Larmour
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