[argyllcms] Different approach to profiling?
- From: Ben Goren <ben@xxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sun, 2 Sep 2007 09:19:32 -0700
So, the whole thing with manually adding neutral patches has got
me thinking.
The standard approach to generating test patches makes perfect
sense for the general case: you have no idea what colors you'll
wind up printing, so you want some sort of even distribution of
colors to make sure everything gets as close as possible.
However, as a photographer, none of my photographs actually has an
even distribution of colors. Usually, just a few parts of the
spectrum predominate. And black and white is just a special case
of that -- the colors are tightly bunched along the middle of the
Lab volume, rather than clumped in a couple areas.
What I'm thinking of to better address profiling for photography
would require two things (which, for all I know, might already be
possible to do with Argyll): the ability to generate test patches
from an image, and the ability to merge chart readings with
earlier ones after the fact.
You would start with a profile built the same way as is normal
today. Then, when you wanted to make a high-quality print of a
particular image, you'd create a chart tuned to the colors used in
the image, print it, read it, and generate a new profile that
includes the original data as well as the new data.
Over time, you'd wind up with a profile built from tens of
thousands of samples, all drawn from the actual images being
printed. Plus, you wouldn't have to spend the time it takes to
create a profile from such a large sample set all at once -- after
all, adding a few minutes to the time of making a special print
isn't that significant, but spending an entire day creating and
reading a dozens-of-thousands sample chart would be most annoying.
Thoughts? Suggestions?
Cheers,
b&
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