[gs-devel] Resolution required for halftoning?

[Peter Dyson]

Dear Ghostscript gurus,

My apologies if this inquiry is off topic for this list. I figure  
that you would know the answer if anyone does.

Have there been any studies of the  minimum resolution that's needed  
to make a good quality halftone from a digital camera file?

Back when Adobe Level 1 interpreters roamed the earth, the rule of  
thumb was "resolution should be at least twice the screen  
frequency."  For instance, a magazine quality 150-line screen  
required an image file at 300 pixels per inch.

More recently, I've seen claims that this is overkill, and that you  
can print quite successfully with 1.3 times the screen frequency. So  
far, though, the evidence has been anecdotal and sparse.

Please feel free to reply to me on- or off-list.

-Peter
-- 
Peter Dyson, Director of Communication
American Society of Media Photographers
150 North Second St, Phila PA 19106-1912
phone 215-451-2767 (ext 1205),      fax 215-451-0880
http://www.asmp.org