Re: Is there such thing as a wide gamut CMYK workspace?
Re: Is there such thing as a wide gamut CMYK workspace?
- Subject: Re: Is there such thing as a wide gamut CMYK workspace?
- From: "Andre Schuetzenhofer" <email@hidden>
- Date: Sun, 10 Feb 2002 18:13:22 +0100
Hi,
in the procedure of retouching images in RGB it turned out that for some
people things are a little bit better to achieve rather in CMYK than in RGB,
or, in other words, it appears hard for them to think in RGB because they
are used to think in CMYK. Although this is not really important and things
are fine without CMYK (it just takes time and experience), I thought several
times of creating a wide gamut CMYK for retouching matters only.
Basically, I think this thought has a right to exist, as many others might
think too. Since we use IRIS proofer to visualize our data we like to
generate "reference proofs", proofs with only the limitations by the proofer
gamut itself regarding our RGB working space (ECI-RGB). BTW, the limitations
are marginal. Because the proofer space has a black point almost L=0 I
thought of having this space as a reference CMYK space (the IRIS primaries
generate one of the largest CMYK-colorspace I know, maybe the largest), but
for a reference I don't want to deal with dot gain and banding and
unharmonic graybalances.
So I measured the primaries and secondaries, inserted this values in the
"custom CMYK" command within photoshop with white L=100 and black L=0,
defined no dot gain and created a virtual CMYK with the primaries of a real
output device. The first trials worked very well, the profile has an
excellent graybalance, and it turned out that this colorspace tended to
slight less banding than the RGB-space! I lead this back to the fact that
our RGB-Workingspace is much bigger than the scanner-space, therefore with a
colorimetrical transformation there are fewer graysteps left to describe the
smaller space in the big one. This seems to be better with this "smaller"
IRIS-CMYK, who is at least wider than almost every press-CMYK I know.
Now here comes the snag in it. I don't really like black generation in this
profile, or, in other words, I would like to have more control over black
generation. I seems that black is too flaw after transformation in this
space, it shows no shadow details, an important issue in retouching. I
"solved" this problem by creating the profile without black, but this is not
really what I want.
So, does anybody know of a profile creator who creates a profile with
detailed black generation *without* GCR or UCR (who only exist because of
non-ideal production conditions) out of primaries and secondaries?
Thanks in advance and regards,
Andre Schuetzenhofer
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.