>From: Winsor Crosby <wincros@xxxxxxxxxxx>
>Subject: [OM] Re: The monitor debate: LCD vs CRT(OT)
>Date: Mon, 20 Sep 2004 23:17:21 -0700
>I agree with most of what you say, but have to differ a bit here. I am
>not sure what you are talking about when you talk about banding and
>gray scale. I have not observed any problem with viewing grey scale
>images on my Apple Cinema Display. Can you explain a bit? Maybe I
>don't understand you.
>
Hi Winsor,
Okay, so here's a test I learned while attending an Andrew Rodney
Color Management course at Santa Fe Workshops....
Open an new PS document, say roughly 700-800 pixels wide. Take the
gradient tool, and draw a "continous tone" gradient from black to
white in a band across your new document. Generally a band 1.5-2cm
suffices for this demo. If you look at your ACD closely, you will see
that there are discrete bands of gray in the black-to-white gradient,
that is, they look like discrete bars with different gray levels. It
should be a continous tone of gray, but it is not. I have even seen
it where, if you have a gradient going from black on the left to
white on the right where one band to the right of another band is
*darker* than the band on the left adjacent to it.....it is apparent
in virtually every LCD I have looked at (haven't looked any any EIZO
displays, though), including all Apple Cinema Displays, and including
the new aluminum 30" Cinema Displays. What this tells me is that they
are not truly continuous tone. This is what I'm (and Andrew does as
well) referring to as banding...
Cheers,
Stephen.
--
2001 CBR600F4i - Fantastic!
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