ries@venice.SEDD.TRW.COM (Marc Ries) (07/19/90)
Please Post Responses (Was: Re: Inquiry about closeout scanners Also, I read recently (Publish?) where the maximum grey-scale gradient/shade that a typical 300dpi laserjetII is about 15 (i.e., the printer only output from white to black via ~15 different grey-scales). The point being that if you can only print 15 different grey-scales, what good is a 256 grey-scale scanner. Similar args might be made for a scanner supporting more that 300dpi if your printer is limited to 300dpi. Anyway, Is this hogwash or ? Thanks, Marc Ries
chute@bru.MAYO.EDU (Chris Chute) (07/23/90)
I had one reponse, here it is: ::You've been reading Computer Shopper -- Camco, Envisions, and/or another ::ad I can't remember. The $399 prices have been there for almost a year. ::Only problem: those scanners are sheet-feed, not flatbed. ::Unless you need one this calendar year, wait for..... :: ::...The $2500 Scrax Machine...! (my term) --- :: ::a LaserJet-sized combination printer/scanner/fax/copier all in one. ::The idea has been in the news, with several companies said to be in ::the hunt for "every businessperson's desktop". :: :: ::-- ::Kenneth W. Regan Assistant Professor ::Computer Science Dept. (Opinions not < SUNYaB) ::SUNY at Buffalo, 226 Bell Hall Tel.: (716) 636-3189, -3180 ::Buffalo, NY 14260 regan@cs.buffalo.edu :: Cheers, Christopher G. Chute, MD Voice: (507)284-5506 Section of Medical Information Resources FAX: (507)284-1516 Mayo Clinic/Foundation UUCP: chute@medinf.UUCP Rochester, MN 55905 Internet: chute@mayo.EDU
ath@prosys.se (Anders Thulin) (07/27/90)
In article <676@venice.SEDD.TRW.COM> ries writes: > The point being that if you >can only print 15 different grey-scales, what good is a 256 grey-scale scanner. >Similar args might be made for a scanner supporting more that 300dpi if >your printer is limited to 300dpi. > >Anyway, Is this hogwash or ? If you scan only in order to print it out on a 300 dpi printer, it's probably true. If scan in order to examine the result on a monitor it is not. The eye can distinguish between 30-50 (?) levels of grey. And if you scan in order to do image processing (enhancement, filtering) you definitely want as many grayscales as possible. -- Anders Thulin ath@prosys.se {uunet,mcsun}!sunic!prosys!ath Telesoft Europe AB, Teknikringen 2B, S-583 30 Linkoping, Sweden