My favorite topic...
> Using Photoshop as an example, in the Proof Setup dialog you can select a
> rendering intent. So, say you have an RGB image opened that has the Adobe
> 1998 RGB profile assigned to it. In the proof setup, you want to simulate
> this image using the US Web Coated SWOP CMYK profile. The rendering intent
> selected affects the conversion from Adobe 1998 to US Web Coated SWOP,
> right?
Right. Choosing Perceptual or RelCol, however, in this case, from anyRGB to
SWOPv2 returns similar results because SWOPv2 practically uses the same Lab
to CMYK conversion in both cases.
> What about the conversion to your monitor profile for the on screen
> display? What rendering intent is used for that conversion? For that matter,
> what rendering intent is used when Photoshop displays any image on screen?
As long as you don't check Simulate Paper White or Ink Black, PS uses RelCol
to the screen.
> Every ICC profile has a default rendering intent embedded in it. I believe
> the idea behind that is so that a CMM will know which intent to use in the
> event that it's not supplied by the user.
Right. Sort of a default.
> So assume I convert an image from
> one color space to another using an application that doesn't allow
> explicitly setting the rendering intent.
That is exactly the scenario.
> Also assume that the source and
> destination profiles both have different default rendering intents specified
> inside them. Which of the two, source or destination, rendering intents does
> the CMM use then?
In my opinion, the Destination wins. I could be wrong.
> Chris McFarling
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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