Re: Color Quartet and ICC profiles
Re: Color Quartet and ICC profiles
- Subject: Re: Color Quartet and ICC profiles
- From: Roberto Michelena <email@hidden>
- Date: Thu, 10 May 2001 20:43:46 -0500
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Joseph:
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CQ "looks" at the scanner profile when it does the preview scan. Thus the
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preview has ALREADY been profiled and is being displayed via colorsync
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monitor call.
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Default Tone Response curve means turn color management on or off.
I am not sure of this... I believe DTR, if selected, comes before color
management, sort of "linearizing" the scanner before profiling.
I believe this because if I profile with different IT8 targets/data
files, even having DTR on, I get different results. If DTR were disabling
IT8 calibration, this wouldn't happen.
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So to use CQ it is best to check default tone response curve off. Then do an
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IT8 scan with minimal correction to the scan. Say auto neutral the 50% gray
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and set the highlight and shadow with some headroom. Save these scan
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settings as "site color" and leave them there for all future scans with this
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particular profile you are generating. You may want a few variations for
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different types of originals. Say a high key, low key, flat and contrasty
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set of "site color" settings and profiles. Go ahead and scan the same target
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with these different settings.
You mean do different scanner profiles? these corrections usually are
made in output profiles I believe...
Or I am not getting it... you mean just having "site colors" to apply
after the profiled scan?
The profiled scan should per se neutralize the gray wedge (as long as
it's neutral in the target) without the need for adjustments...
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Use Linocolor to create the profiles, it seems to work best.
You mean Linocolor or ScanOpen ICC? have you tried both?
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Then once you
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have the profiles you can put them anywhere - they don't have to be in the
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colorsync folder. But you have to use Edit Preferences in CQScan to point to
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the appropriate profile and do a new Preview each time you change the
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profile (I always restart CQScan to make sure it recognizes the new
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profile).
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No you won't see any changes in the feedback window or densitometer because
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the profile was applied to the Preview. You will notice the difference in
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the Preview. Try doing a Preview scan with default Tone Responce turned on
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and off and with CQScan pointed at different profiles. You will see the
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changes there.
You are then indeed talking of having a variety of scanner profiles...
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None of the 16 bit negative stuff works (color or grayscale). Just scan
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grayscale negatives as though they were transparencies in 16 bit, invert and
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edit in Photoshop. You are way better off that way.
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Best wishes,
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Nick Wheeler
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