Xref: utzoo comp.graphics:16526 comp.periphs.printers:929 comp.sys.ibm.pc.hardware:6389 Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!caen!uflorida!cs.fau.edu!mthvax!bsherman From: bsherman@mthvax.cs.miami.edu (Bob Sherman) Newsgroups: comp.graphics,comp.periphs.printers,comp.sys.ibm.pc.hardware Subject: Re: Gray Scale Graphics For HP IIP Keywords: laser printer gray scale Message-ID: <1991Mar12.021020.18894@mthvax.cs.miami.edu> Date: 12 Mar 91 02:10:20 GMT References: <7784@drutx.ATT.COM> <1991Mar11.144450.18991@lonex.radc.af.mil> Distribution: comp Organization: Not much! Lines: 31 In <1991Mar11.144450.18991@lonex.radc.af.mil> andrewsh@lonex.radc.af.mil (Harold G. Andrews II) writes: >In article <7784@drutx.ATT.COM> bal@drutx.ATT.COM (LesebergB) writes: >>Has anyone developed anything for the HP IIP so it can do >>true gray scale graphics (whether 16, 64, or 256 scale) without >>dithering ? I thought the HP Series II had such a product, but >>haven't seen one for the IIP. I've seen some Postscript cartridges, >>but don't believe they have any gray scale capabilities, but then >>I'm new to this desktop publishing stuff. Thanks ! >>-- > I could be wrong (and I expect y'all out there will let me know if I >am) but, as far as I know, laser printers are incapable of gray scale images >for much the same reason that photo-copiers are incapable of reproducing >gray scale images. There is no way to control the color of the toner deposited >onto the page. It is either there or it isn't. There is no middle ground. >There may be some new techniques out there with which I am unfamiliar. All >of the HP laser jets, though, are not capable of a partial deposit of toner >onto the page. Well, I hate to argue with anyone, however as I type this I am looking at a printout of a digitized photograph of a cat that I printed on a HP IIP from a program called Paintworks Gold on the Apple II GS, and it has 16 gray scales in it. The laser driver used for this was Harmonie from Vitesse, and it allows you to choose from 1 to 16 gray scales before you print.. So if it is done in software or hardware, I do not know, but if the bottom line is the finished result, then yes it can be done.. -- bsherman@mthvax.cs.miami.edu | | MCI MAIL:BSHERMAN