I just looked up, what eval_pattern does, because I never used it before
and was quite surprised that I never recognized it before, because it
seems very useful, your picture is a very good example. 

BTW, what function do you use for the orientation of the objects? It
does not seem to be the luminance. 

Christoph

--
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/

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