The effect isn't as strong as is should be. I don't know if this is a function of the glare of my monitor, or the colors I used, or what. If you have any ideas, please let me know.
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Subject: McCollough Effect Demonstration
Date: Sun, 5 Mar 2000 21:15:16 -0800 (PST)
From: "Ryan E. Yount" <younry2@dons.ac.usfca.edu>
To: werner.stangl@jku.at
Hello!
I saw your example of the McCollough Effect on your web page. You
mentioned that the effect seemed weaker than it should be. You asked for
any ideas, well here are a few: I think you may be right about monitor
glare, in lab experiments it needs to be controlled due to the effect on
perception of the gratings. Also, the colors you used seem a bit dull;
that is, I think they could be a little brighter and would then provide a
more intense effect. Bill Cheswick, at Bell labs, has a nice little web
page with a pretty good demonstration, his colors are fairly bright and
produce a better effect. His web address is:
http://cm.bell-labs.com/who/ches/me
One last thing I think may be affecting the intensity of the effect is
the grating patterns themselves, in that the lines seem to be a little
thick for the size patterns you are using. Try using thinner lines (make
sure the black and color lines are the SAME size) and I think you may get
a better result.
Hope that helps some!
Sincerely,
Ryan E. Yount
younry2@usfca.edu
University of San Francisco
(415)422-8365
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