Is there a filter that will make a halftone image look like a newspaper image
(made up of a fine structured pattern of dots)? I need to do some newspaper
ads but have not been able to find a way set the linescreen in my images.
I've tried various dithering techniques without success. What I'm looking for
is the type of output that a Postscript printer is capable of: being able to
set the angle and frequency of the dots in the image.
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