Re: Custom ICC Profiles/Conversion Rending Intents
Re: Custom ICC Profiles/Conversion Rending Intents
- Subject: Re: Custom ICC Profiles/Conversion Rending Intents
- From: Graeme Gill <email@hidden>
- Date: Sun, 19 Jun 2005 15:32:12 +1000
- Organization: Argyll CMS
Chris Murphy wrote:
Now, it *is* possible to set an ink limit (which is a limit, that is it
should not be higher than that value), but the higher the GCR is, the
lower total ink will be, and vice versa. I don't know of a single user
interface (something in my brain is saying Fuji ColourKit ProfileMaker
or the editor may be an exception) that shows this intuitively. For a
given data set, I feel like the UI needs to give me feedback on what
amount of black generation is necessary for a particular ink limit, or
what ink limit is implied for a particular black generation.
It's a strange profiling package that would let the GCR have any effect
on the ink limit. Generally it is assumed that the ink limit is a much
higher priority than the GCR, so it should be adhered to under all
circumstances. GCR is a preference, adhered to if possible (at least
that's how my software works.)
Technically it's possible to find output of a B2A table that exceeds
the ink limit, due to the nature of the interpolation. Just because
all the nodes of the multidimensional grid are at or under the ink
limit, doesn't ensure that the interpolated device values between the
nodes of a cell are going to be under the ink limit.
[Of course an old school open loop color system will use GCR
to control ink limit.]
Graeme Gill.
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