Re: Brightness and Contrast
Re: Brightness and Contrast
- Subject: Re: Brightness and Contrast
- From: email@hidden
- Date: Wed, 24 Jan 2001 08:21:00 EST
In a message dated 1/23/01 11:08:22 PM, email@hidden writes:
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I have yet to see a monitor calibration app which really handles brightness
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and contrast settings well.
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I've been demoing PhotoCal on a few monitors, and on some the black ramp
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shows no steps no matter what I do. Then, when it suggests the 85-95
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candela/m2 range, if I listen to it and pull down the contrast (I was
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surprised it didn't offer brightness instead), it gets too dark. I had
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a
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beautiful monitor with a luminance in the mid-200 candela range and decided
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not to pull it down, because it looked so much better (and better
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approximates the stock I use the most).
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My understanding is that OptiCal actually can automate these settings.
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Is
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it better; does it work? And of course, I leave open the option that I'm
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missing something.
Yes, OptiCal makes the blackpoint measurement with the colorimeter, instead
of visually, and I would expect to se this feature in PhotoCal soon. 200+
Candelas/square meter will burn out a CRT in a matter of months! There is an
interaction of the RGB gun controls and the total luminance that can be set
with either PhotoCal or OptiCal by moving all the guns up or down, instead of
simply balancing them at the current bar location. Try using that to set the
luminance below 100. Also be sure that there is minimal ambiant lighting
when you set the black point, and that there is no direct light sneaking
between the puck and the screen when you are making initial settings, this
can affect the result with virtually any brand of colorimeter. I'm having
trouble imagining the paper and lightbox that would match a monitor
accurately set at over 200 L/sm... perhaps there is come other factor in how
you are using the program that is causing this. I agree that in the long run
setting both gain and bias with a calibration program would be of use, but it
would not effect the black point per se, only the color balance in the darker
tones.
C. David Tobie
Design Cooperative
email@hidden