Path: utzoo!utgpu!watserv1!watmath!att!pacbell!pacbell.com!ames!ucsd!usc!cs.utexas.edu!chinacat!woody From: woody@chinacat.Unicom.COM (Woody Baker @ Eagle Signal) Newsgroups: comp.lang.postscript Subject: Re: compensating for distortion Summary: I should have expected this one. Message-ID: <1296@chinacat.Unicom.COM> Date: 4 Jun 90 04:38:43 GMT References: <90May30.095014edt.18974@me.utoronto.ca> <1289@chinacat.Unicom.COM> <1990Jun1.155110.3330@ico.isc.com> Organization: a guest of Unicom Systems Development, Austin Lines: 46 In article <1990Jun1.155110.3330@ico.isc.com>, rcd@ico.isc.com (Dick Dunn) writes: > Laser printers do (as Henry noted) commonly have a pixel aspect ratio not > quite 1:1. But if you're really concerned about that, you can take some > precise measurements and compensate with a transformation matrix, or if > it's an image, compensate in the scanning or conversion. > > > What's a color analog copier? I'm assuming you mean a copier that is > capable of continuous-tone repro (as opposed to high-contrast "line" copy). > What ever would that have to do with counterfeiting? Color analog. I.E. direct imaging on the drum like 99% of all black and white copiers. Current color copiers, with 1 exception that I can think of digitize and print the colors as spots like a laser printer does. The original color copiers were basically analog, with non-glossy toner. There were a few made. VERY few, and they were literaly kept under lock and key, with a strict accounting made of EVERY copy, failed or otherwise, and submitted to the treasury dept. In addition they were routinly inspected by TD investigators. They were capable of accuratly copying money, or virtually anything else. The resultant copies were quite good enough to fool automatic change machines, and enough people to get the TD rather interested. Proto types existed way back in the early 80's. I have worked at 2 places (separated by 5 years and many miles) that dealt with copiers. This info was known in both places, and it is NOT "conspiracy theory". The TD was plain flat worried about them. > > No, mandated by the process. > Dick, there are glossy and non-glossy toners. For example, the MITA 9000 (a very old copier) had one of the glossiest toners ever produced. Nearly ALL current black or single color copiers produce a flat non-glossy print very similar to laser printers. Even those that have 2 or more colors. The process does NOT mandate the glossy colors. Flat colors would (do) work just as well. > Conspiracy theories are fun, but sheeesh! Conspiracy theories???? Where did this come from? Cheers Woody.