On Fri, Oct 31, 2003 at 12:21:48PM +0100, Michal Kvasnicka wrote:
Good evening.
I apologize to ask a little off-topic question, but I don't know where to ask (and it is closely related to TeX and PDF).
I typeset a church bulleting. It is printed on a laserjet printer (600 dpi), and then copied on a copy machine. As for letters, all is right. But figures (photos) are this way spoiled. I guess it would help either to force PDF to print the figures in some very low resolution (150 dpi), or (probably better) to dither the figures and include them in PNG (instead of ordinary JPEG). Can some of you tell me how to do it? I tried ImageMagick's convert to dither the photos, but outcomes were really poor. Is there some good free software for this (in the best case in Linux)? Or can I do it some way in PDF?
Many thanks for any hint. Michal Kvasnicka
A PostScript solution: create a dvips header file for course rasterization: %! /bop-hook {53 45{dup mul exch dup mul add 1. exch sub}setscreen} def These numbers (raster frequency and angle) are probably ok for 600dpi; otherwise, experiment a bit. Call it coarse.pro and give dvips a parameter -h coarse.pro -- Siep Kroonenberg siepo@cybercomm.nl