NetNews Usenet Archive 1992 #18/NN_1992_18.iso/spool/comp/sys/mac/misc/15128

Internet Message Format | 1992-08-19 | 1.9 KB

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Path: sparky!uunet!snorkelwacker.mit.edu!news.media.mit.edu!news.media.mit.edu.!puccio
From: [e-mail] (Jim Puccio)
Subject: Gamma Correction Help Wanted
Message-ID: <[e-mail]>
Sender: [e-mail] (USENET News System)
Organization: M.I.T. Media Laboratory
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Date: Thu, 20 Aug 1992 00:44:10 GMT
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I have a Mac II with a 13" Apple color monitor and the associated 8 bit
video card (I forget the model number) circa 1988.

I would like to gamma-correct the monitor.  Can comeone direct me to
the software/hardware solutions I should be looking at?

Note 1:  I found a "gamma" button in the control panel, and pushed it, getting
slightly better colors, but still, not wonderful.  Besides, I question the
effeciveness of any gamma correction approach which does not use actual
photometric data from the monitor to determine the transfer function!  Where
on earth does this button get this data from?  How could it know?

Note 2:  I vaguely recall there being a product maybe a year or two ago from
Radius (?), where the monitor came with a photometric device which suction
cupped onto the front of the monitor, allowing you to construct the transfer
function, which could then be loaded into the correction software.  Can anybody
corroborate this memory, and give me some concrete info?

Ideally, I'd like to do something like the approach I just described, but
avoid (for now) purchasing a whole new monitor & video card.  Is there a way
I can achieve there results with th hardware I have?  (I'd be willing to
buy the photometric device & associated software, of course.)

Thanks in advance,

-- Jim Puccio [[e-mail]]