Re: RBG printer profiling - i1 Match vs ProfileMaker Pro
Re: RBG printer profiling - i1 Match vs ProfileMaker Pro
- Subject: Re: RBG printer profiling - i1 Match vs ProfileMaker Pro
- From: Steve Kale <email@hidden>
- Date: Thu, 03 Nov 2005 11:18:49 +0000
- Thread-topic: RBG printer profiling - i1 Match vs ProfileMaker Pro
Title: Re: RBG printer profiling - i1 Match vs ProfileMaker Pro
OK got it – thanks. I assume that EyeOne Match would default to a size like PM 5 “default” and “neutral grey” for grey axis handling.
Any ideas as to which gamut mapping option is likely employed in Match and, for that matter, viewing light source (I assume D50 as that is what’s embedded in the CIED tag in the profiles it generates) and whether there is correction for optical brighteners (Match profiles have compensateflourescence=”1”)?
(I use a different program for B&W ICC profiles made by Roy Harrington. It creates profiles that manage the luminance axis for the PCS to printer direction (no hue management) but soft proof both colour and luminance information. Hue management is left to the ink selection in a rip or tint picker in Epson Adv B&W. But I am trying to learn more about how luminance is managed by the various perceptual intent algorithms out there versus relcol + Adobe bpc – but that’s another thread.)
Cheers
Steve
From: neil_snape <email@hidden>
Date: Thu, 03 Nov 2005 08:53:39 +0100
To: Steve Kale <email@hidden>, colorsync user list <email@hidden>
Conversation: RBG printer profiling - i1 Match vs ProfileMaker Pro
Subject: Re: RBG printer profiling - i1 Match vs ProfileMaker Pro
on 2/11/05 23:34, Steve Kale wrote :
Thanks. Sorry I can only read the online help. Unless I am mistaken I can’t demo this thing and it’s not cheap. I see the options you mention below in the Online Help under Gamut Mapping Variants. I note also there is the option to “Define Handling the Gray Axis in the calculation of the Perceptual Rendering Intent.” Can someone explain to me what these options are. Is there any more available literature on what these options do?
(They will also have applicability to something I am tinkering with in the B&W domain.)
I forgot to mention viewing lighting is selectable in PM where in Match it is not.
Grey axis is an option that can be considered this: use neutral grey for an paper independent color corrected grey from 3/4 tones to highlights for most situations. As Gretag suggest use paper grey for pass thru colored grey such as newsprint when the media base is colored such as pink or blue stock etc. In some cases users have had success with using paper grey with art papers as the cotton rag is usually quite yellow , so they prefer to leave the grey come through without correcting for this yellowness in the grey scale. It’s an option that is there for these cases.
To do B&W profiles many options exist, yet they all require more than one button profiling. Personally I have not tried any of the following but you can either build them in PM as rgb or cmyk profiles then create a device link profile or use Profile Editor and save as Gray Profile, use custom generated low saturation charts, and or custom N color profiles say for 3 or 4 color tri or quad tone blacks IF you have a rip that can accept multi channel separations.
What I do for B&W profiles is run edits on top of the TC 9.18 charts reducing the composite colors until I have a near neutral rendering that is much less metameric under the desired viewing lights. Just another example of when a editor is useful for all the wrong reasons!
--
Neil Snape photographer Paris France email@hidden http://www.neilsnape.com
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