Re: Re: No Color Adjustment
Re: Re: No Color Adjustment
- Subject: Re: Re: No Color Adjustment
- From: <email@hidden>
- Date: Fri, 26 Apr 2002 16:27:34 -0400
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From: email@hidden (Bruce Fraser)
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Date: 2002/04/26 Fri PM 01:48:12 EDT
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To: "Steve Lawrence"<email@hidden>,
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<email@hidden>
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CC: <email@hidden>, <email@hidden>,
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<email@hidden>, <email@hidden>, <email@hidden>
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Subject: Re: No Color Adjustment
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At 12:24 PM +0000 4/26/02, Steve Lawrence wrote:
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>As a driver developer the recent threads on selection of colour paths through
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>non-Postscript drivers for profiling has been interesting.
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>Obviously your requirements for such a path include:
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>1. The colour behaviour must be repeatable.
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>2. Colour gamut should be maximised.
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>What else would you add? I can see that a linear response and an
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>appropriate ink
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>limit when printing the testchart would be candidates if your characterisation
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>tool does not have pre-profile linearisation and testchart ink limit controls.
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>Would you prefer the driver perform those functions even if they are in the
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>characterisation tool? If so, why?
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Even if the characterization software has linearization and
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ink-limiting (a BIG if), it still takes a round of measurements, with
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the concomitant expense of ink, paper, and my time...
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It would be delightful if the driver did linearization, ink limiting,
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and *gray-balancing* for your paper stocks. (We'll get to the tools
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for handling third-party papers later!)
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>The driver obviously has to do the RGB to CMYK conversion for you due to that
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>pesky operating system limitation. Would you prefer it do a simple conversion
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>which makes no assumption about the nature of the ink and substrate,
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>such as the
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>"classic" one-minus RGB to CMY conversion with K=min(C,M,Y), or
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>would you prefer
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>a "fixed" accurate colour conversion, from say Adobe 98 to a canned output
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>profile?
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I'd prefer it to do neither of the above, but rather a smart
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RGB-to-CMY conversion that honored the RGB source profile.
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In the case where there's no profile, I'd very much like to see a
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conversion that assumed whatever RGB primaries and gamma result in a
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linearized print with maximum gamut. Then I'd like to see that
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assumed RGB space characterized in a profile, and published...
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It would be really, really nice if the driver offered some explicit
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control over ink limits besides the implicit control offered by media
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types. I'd settle for something very simple, like a slider going from
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less to more, that was wired into the media type settings so that
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people could tell at a glance which ones laid down more and less ink,
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and were able to tweak too.
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Black shape control is probably too much to ask -- it could turn into
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a hurt-me button -- but I'm sure there are those who would want it.
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Bruce
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--
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email@hidden
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Bruce,
I have been thinking about these types of controls for a year and was thinking you or your business associates whould venture to make these types of products. I have lots of clients that could benefit. Sure seems like a good opportunity.
Jim Rich
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