Calibrated Colorspace Images slow?

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#1594

From: Marcel Weiher
Date: Fri, 13 Nov 1992 07:50

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Hi,

I've experimented a little with the PS-Level II colorspaces.
Normal drawing is OK (once the color space is set up, which
takes a while).

However, images are incredibly slow: Over five seconds for
a 256x256 image.  This comes out to about 75 microseconds
per pixel!  What are they doing, interpreting the PostScript
procedures for each pixel?  I thought there would be lookup
tables, but apparently not.

Has anybody tried this, and possibly gotten better results?

Grateful for any info,

Marcel

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Message-ID: <1992Nov13.075025.25402@cs.tu-berlin.de>

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Newsgroups: comp.sys.next.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!sun-barr!cs.utexas.edu!qt.cs.utexas.edu!yale.edu!ira.uka.de!gmd.de!Germany.EU.net!news.netmbx.de!mailgzrz.TU-Berlin.DE!cs.tu-berlin.de!marcel
From: marcel@opal.cs.tu-berlin.de (Marcel Weiher)
Subject: Calibrated Colorspace Images slow?
Message-ID: <1992Nov13.075025.25402@cs.tu-berlin.de>
Summary: Images rendered in any but the default colorspace seem _very_ slow
Keywords: PostScript,ColorSpace,Images,Speed
Sender: news@cs.tu-berlin.de
Organization: Techn. University of Berlin, Germany
Date: Fri, 13 Nov 1992 07:50:25 GMT
Lines: 17