morgan@ooc.uva.nl (Chris Morgan/RIKS) (05/29/91)
Hi all, I have just installed LaserWriter 6.0.2 and LaserPrep 6.0.1 in the hope that I can print true grey scales on my laserwriter II NT/NTX. BUT until now, everything I have tried to print has been the same as before with the previous printer software - grey made up of larger or smaller dots (like on a newspaper photograph). How can I get TRUE GREY SCALES output from my Laserwriter ??? Can anyone suggest the correct method ??? Best regards, Chris Morgan morgan@riks.nl
gillies@m.cs.uiuc.edu (Don Gillies) (05/30/91)
If you are getting better than 72dpi output, then that's as good as it gets. I am somewhat surprised at how poor the postscript greys look at 300dpi. Somewhere I read that there were only 20 distinct shades of grey available. I don't understand why there aren't 17 or 65 or some number like 2^n + 1. I have tried printing mathematica plots a NeXT laser printer at 400 dpi and the result looked about twice as good. I don't know if it generates grey scales differently, but it sure does a better job. Don Gillies | University of Illinois at Urbana-Champaign gillies@cs.uiuc.edu | Digital Computer Lab, 1304 W. Springfield, Urbana IL --
dorner@pequod.cso.uiuc.edu (Steve Dorner) (05/31/91)
>I am somewhat surprised at how poor the postscript greys look >at 300dpi. >I have tried printing mathematica plots a NeXT laser printer at 400 >dpi and the result looked about twice as good. Naturally. 400dpi = 1,600,000 dpsi, whereas 300dpi = 900,000 dpsi. 1,600,000/900,000 = 1.8; matches pretty well with "about twice", eh? -- Steve Dorner, U of Illinois Computing Services Office Internet: s-dorner@uiuc.edu UUCP: uunet!uiucuxc!uiuc.edu!s-dorner
dorner@pequod.cso.uiuc.edu (Steve Dorner) (06/01/91)
I wrote: >Naturally. 400dpi = 1,600,000 dpsi, whereas 300dpi = 900,000 dpsi. >1,600,000/900,000 = 1.8; matches pretty well with "about twice", eh? Obviously, I divide better than I multiply. You can all stop sending me mail to that effect. :-) The point remains that a 400dpi printer puts nearly twice as many dots on a page as does a 300 dpi printer. -- Steve Dorner, U of Illinois Computing Services Office Internet: s-dorner@uiuc.edu UUCP: uunet!uiucuxc!uiuc.edu!s-dorner