Re: CMYK spaces used for document creation
Re: CMYK spaces used for document creation
- Subject: Re: CMYK spaces used for document creation
- From: Andrew Rodney <email@hidden>
- Date: Mon, 2 Nov 2009 10:29:01 -0700
On Nov 2, 2009, at 8:04 AM, Martin Orpen wrote:
I took a test target that is supposed to highlight problems with ICC
profiles and printer linearity/gamut.
I printed it from Photoshop and it was far more bandy than I'd have
expected from the profile that I'd built.
So I used Graeme's ArgyllCMS to convert a copy of the test image to
the same printer profile and then sent this from Photoshop to the
printer.
The results are significantly different.
The PS conversion is bandy and ugly looking. The Argyll version is
extremely smooth and sexy looking.
Draw your own conclusions...
I can’t make too many conclusions because as someone I just contacted
off list correctly suggested, the burden of proof is on you, the
fellow who did the testing. We need more data and information and
ideally some files.
Its possible ArgyllCMS is using a different CMM than Photoshop (which
allows you to use several) but unless you hit a bug, the differences
should be tiny and insignificant. There’s no bug in ACE or the Apple
CMM that I know of that would account for what you report. Considering
the tens of thousands, if not millions of images who’s color spaces
are converted by Adobe applications let alone Photoshop, its pretty
hard to believe its a bug in its CMM.
It could easily be user error. And the descriptions (bandy and ugly
versus smooth and sexy) make it pretty difficult to understand who or
what’s at fault here.
Photoshop allows the use of Dither, we have no idea if you used it or
not and if that’s an option with Argyll. Dither is almost always
something you want to use for imagery but of course, the one test you
did was on a synthetic test file. One can only guess what’s going on
here based on the limited data you’ve provided. But you seem pretty
convinced that you’d rather have needles stuck into your eyeballs than
use an Adobe product for color space conversions and you’ve only so
far, convinced one human that this is the wise option to be making.
Andrew Rodney
http://www.digitaldog.net/ _______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden