Moire patterns in screen captures

Subject: Moire patterns in screen captures
From: Arthur Comings <atc -at- CORTE-MADERA -dot- GEOQUEST -dot- SLB -dot- COM>
Date: Thu, 8 Sep 1994 14:45:14 PDT

when I print
> bitmaps (which print out OK in other applications), Ventura adds white
> grid lines to them.

Sounds like a moire ("mwa-ray") pattern. This is caused by the
combination of the resolution of the screen on which you captured the
figure and the resolution at which you decided to print it out. When
they are in synch -- theoretically -- you'll see no pattern. In
FrameMaker, capturing off a Sun SPARCstation, bringing the figure in at
72 dpi supposedly achieves this, although I use 150 dpi regularly with
no ill effects.

That's a brain dump of what I know -- or think I know. I'm sure that
people who know more than I do about it will be glad to amend this
explanation as needed.

Arthur Comings

Corte Madera, California
atc -at- corte-madera -dot- geoquest -dot- slb -dot- com

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