ProfileMaker Tone Compression
ProfileMaker Tone Compression
- Subject: ProfileMaker Tone Compression
- From: Roger Breton <email@hidden>
- Date: Tue, 31 Oct 2000 15:35:55 -0500
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There may be a terminology problem, but in any case I'm not sure what
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you're looking for?
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ProfileMaker 3.X is made up of modules. The ProfileMaker module itself lets
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you directly measure a single data set and create an ICC profile from that,
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and the MeasureTool module lets you build more robust data sets before
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creating the profile. If you are creating a printer profile, you may
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configure black generation, the behaviour of the gray axis, and the size of
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the LUTs. When the printer profile is built, you can launch the
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ProfileEditor module to change the white point which might be what you mean
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by tone compression. You can also edit the rendering intents individually.
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But then none of this may be relevant to your question.
Henrik,
by "Tone Compression" I mean the mapping of Lightness values that takes
place from Input space to Output space. As you already know, the Lightness
range of a monitor typically goes from L*=0 to L*=96. That of a CMYK offset
press typically go from L*=20 to L*=92. Clearly, compression has to take
place between these two spaces on a grayscale level at the time of
conversion.
Kodak Color Flow and Color Synergy from Picto, at least that I know of, are
two packages that offer options for generating ICC profiles based on a
choice of either HighKey, LowKey or MidKey type of tone compression method.
Those would optimally suit different classes of originals.
My question is why would ProfileMaker not offer a choice of Tone Compression
method like CF or CS? How have they solved that problem? Is there such thing
as a "universal algorithmic" tone compression that goes on within the
profile itself that is hidden from the user? Or is that ignored altogether?
Or is that simply not a "factor" in the Logo ICC scheme of things?
Roger Breton
QIGC