Re: Repetitive Calibration with Optical
Re: Repetitive Calibration with Optical
- Subject: Re: Repetitive Calibration with Optical
- From: email@hidden
- Date: Thu, 16 Jan 2003 10:33:16 EST
In a message dated 1/15/03 11:45:12 PM, email@hidden writes:
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1. I always start PreCal as an independent application. I have never
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opened PreCal under Optical. It this a mistake? How can this make a
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difference?
It shouldn't make a difference; in fact, on the Mac the only way to access
PreCAL is independant of OptiCAL. If this does make a difference it is a
specific problem with your specific combination of OS, computer, video card,
and Spyder.
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2. What is the consensus on the "calibration enabled" check box in
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Optical? To leave it checked or not checked before hitting the
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"Calibrate" button?
That one is absolutely clear: it is to be left checked so that you are
profiling with the calibration in place.
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3. How do I reset the LUT in Windows? It was suggested to uncheck the
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"calibration enabled" check box in Optical. To test Optical, I need a
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way to do this outside of Optical.
When you check and uncheck the box, everything on the screen should change
color and brightness. If its does not, then you have an issue with video card
compatability.
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4. C. David Tobie brought up a very interesting issued regarding the
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whitepoint setting in Optical. I have been setting the whitepoint to
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D65 in PreCal and D65 in Optical. Is this double defining the
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whitepoint?
Yes, which isn't the end of the world, but the default in recent versions of
OptiCAL is Native for a reason... its best to leave it there.
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5. Standard or Precision mode, which one?
Is there some reason that you are trying to reset the idle of your engine?
Your monitor has current black and white luminance values. If you use the
front panel to adjust all three guns to the desired total luminance in
PreCAL, there is really no reason to retarget white with the Precision mode.
And there is usually no reason to reset black either... if you set it too
low, it starts bumping into the bottom, reducing the smoothness and
neutrality of the lowest grays; if you raise it, you are reducing the
deepness of your blacks. You generally don't need to do any of this; just
leave it in Standard mode, set the desired luminance in PreCAL, and set the
black visually for the sensitivity of your eyes in your location (something a
device based black reading in not going to consider), and call it good.
C. David Tobie
Design Cooperative
email@hidden
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