image brightness, PC versus Mac

[Michael Haseltine]

Thank you! This is the kind of answer I was hoping for. I also got a couple
of notes with helpful pointers to info on the color/dithering issue, but
this is not a color problem.

Thanks again,

At 12:39 PM 3/26/96 -0800, you wrote:
>At 09:20 AM 3/26/96 -0800, Michael Haseltine wrote:
>>We've been noticing that images that look great on our Macs are very dark on
>>PCs. Subtle details come through on the Macs and are invisible on PCs. Is
>>this a remnant of Macs pioneering the paper-white monitor that PCs haven't
>>caught up to, or some other phenomenon? What are others doing about it, or
>>don't you have this problem?
>>
>
>
>Michael,
>
>This comes by way of the Guide to web Style published at
><http://www.sun.com/styleguide/> by Rick Levine.  He links to the following
>site, <http://www.cgsd.com/papers/gamma.web.html> which explains a bit about
>the differences in Mac vs PC/UNIX display technology.  
>
>In a nutshell, image brightness is affected by the gamma value of the
>monitor.  Macs have built in gamma correction which makes displaying
>graphics relatively painfree.  Apparently some higher end PC video cards can
>also have the gamma value set for a monitor.  Most common PC video cards do
>not.  The result - muddy images when viewed on that platform.  I would
>suggest taking some time with <http://www.cgsd.com/papers/gamma.web.html>.
>They explain how to make images look good on both platforms.  There is also
>a much more in depth discussion of gamma.
>
>Hope this is helpful.
>
>Bill
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Michael Haseltine -- Arid Lands Information Center, University of Arizona
haseltin at ag.arizona.edu