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Re: filmscanners: Setting screen gamma problem




----- Original Message -----
From: "Julian Robinson" <julian@austarmetro.com.au>
To: <filmscanners@halftone.co.uk>
Sent: Thursday, June 28, 2001 10:29 PM
Subject: Re: filmscanners: Setting screen gamma problem


| BUT - the step wedge is still somewhat compressed towards the black
| end.  To get it looking "even" steps over the range, I have to adjust
gamma
| towards the ridiculous extreme, maybe around gamma = 1.3 or so.  Hence my
| original question -  should such a step wedge look evenly spaced on a well
| set up monitor?

No, it should not.  Monitors use gamma of necessity as the guns do not
display light linearly.  Gamma is logarithmic - hence a non-logarithmic step
wedge with even tone spacing will not and should not *appear* evenly spaced
in tone on your monitor.

Maris





 




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