Kevin Brosius on 26 Jan 2005 02:12:09 -0000 |
> > I've been using handwritten postscript to make gray-scale wheels that > are printed on film. They work as I'd intended, but now I'd like to do > the same thing but using halftones to make the 'grays', because this > will mean I can get them printed on high-contrast films that have some > properties that are preferable. > > From what I can see it shouldn't be hard to get halftones, but what > > I've tried hasn't worked. I'm pasting in a simple example that doesn't > work for me, wondering if anybody's got a tip. > > I'm sorry if this seems off-topic. I think I recall some past > postscript questions, but maybe I'm wrong... > > It seems to me this example should show giant (5 per inch) halftone > cells in, for example, gv. But instead I see nice smooth grays. It's been a while since I played with any of this... But aren't good halftone screens, by definition, device dependent? I always run over to Don Lancaster's Hardware Guru stuff when I need cool PS tricks. He's got a article about good halftone screens for 300 & 600 dpi lasers. As your output resolution goes up, you won't have to worry so much about the screen though. What is your film resolution? Anyway, he has a website up now. http://www.tinaja.com/post01.asp There is a ton of PS stuff there. I'd forgotten how much. He used to have an article called Guru Grays with some halftone info. I didn't see it in a quick read through though. -- Kevin ___________________________________________________________________________ Philadelphia Linux Users Group -- http://www.phillylinux.org Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug
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