RE: Repurposing HSV on SGIs
RE: Repurposing HSV on SGIs
- Subject: RE: Repurposing HSV on SGIs
- From: Chris Murphy <email@hidden>
- Date: Tue, 6 Feb 2001 01:35:34 -0700
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Okay, so I would like to define this HSV workspace in an ICC profile for use
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as input on RIP stations, as well as to allow me to repurpose them. That
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is, to use a profile of their HSV to transform to various outputs.
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1) Is it possible to build an ICC workspace profile of HSV?
Perhaps. I don't know how Irix applications deal with color exactly. If
they take requested RGB values in a document and submit those RGB values
directly to the OS, and the OS submits them directly to the video card
without modification - then you have a very good chance of dealing with
this on an SGI box. If HSV is anything like HSB, then it's just a
different way of specifying monitor RGB values.
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What
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information would I need to do this?
You need to call ColorVision and talk to them. I'm 90% sure (or 90%
wrong, either way) that they have an SGI version of OptiCal. I don't know
if it supports calibration for the monitor - but at least you can use it
to create an ICC profile of the monitor's CURRENT condition. They should
tell you if calibration is possible (that's a nice bonus, but not
required).
What hardware I'm not sure. I don't know if SGI has USB support. If so
then you may be able to use/borrow their Monitor Spyder colorimeter from
someone. Otherwise you will need to use/borrow an X-Rite Monitor
Optimizer, which I believe has connections that can be used with an SGI
box.
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2) Am I missing something? Do I really need a profile of the printer and
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not the HSV (RGB)?
Utlimately you will need both. The RIP will take the RGB profile for the
monitor to use as source; then you need to give the RIP another profile
for the output device itself. All conversions require two profiles
(unless you are using device links; you might see if your RIP uses device
links if it has a placeholder for only one kind of profile: if yes, then
you still need to START with two profiles, one for monitor and one for
output device, then build a device link from those two profiles, that's
the easy part.)
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Then maybe I could export the images as HSV (RGB) TIFFs
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and separate to the profile of the printer. That would emulate the process
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at print time, the results of which they like.
Yes perhaps!
Chris Murphy