frontah@PAWL.RPI.EDU (David J Sotnick) (10/28/89)
I have a two-page document in Pagemaker on the Mac and I am trying to get my grey-scale 256 shade 300 dpi scans to come out looking like a real picture on the Linotronic 300 set to 2540 Lines/inch. I tried to do this and I got a terrible result on my scans - they were all screened really badly. They had dense dots all over them. What am I doing wrong? I have the apd set for the right printer, and I have no image control settings just the default grey-scale setting. Confusedly, Dave Sotnick frontah@pawl.rpi.edu -- ------------------------- frontah@pawl.rpi.edu David Sotnick -------------------------
meuchen@GRAD1.CIS.UPENN.EDU (Paul Eric Menchen) (11/20/89)
In article _ frontah@PAWL.RPI.EDU (David J Sotnick) writes: >I have a two-page document in Pagemaker on the Mac and I am trying >to get my grey-scale 256 shade 300 dpi scans to come out looking like a real >picture on the Linotronic 300 set to 2540 Lines/inch. > >I tried to do this and I got a terrible result on my scans - they were all >screened really badly. They had dense dots all over them. What am I doing wrong? > Do you really want 2540 Lines/inch? I know the Lin 300 has resolution of 2540 dpi, but I really don't think you want to print at 2540 lpi. My printer can't take more than about 90 lpi because it can't be resolved for printing. Lpi and dpi are not the same thing. Try setting your lpi to somthing like 90, maybe a little less, and then print. If you want finer detail and don't need to copy or print, try something a little higher, but not 2540. If you do need to print, talk to your printer and ask what he can take. Paul Eric Menchen meuchen@grad1.cis.upenn.edu
mel@fleet.UUCP (mel) (11/22/89)
In article <8911150344.AA03565@crayola.cs.UMD.EDU> frontah@PAWL.RPI.EDU (David J Sotnick) writes: >I have a two-page document in Pagemaker on the Mac ots all over them. What am I doing wrong? It sounds like you may be using a setting that is to high for your DPI's (Dots Per Inch). Try setting it to 150 DPI if your scanner software allows it. The HP LaserJet Plus has a variable setting for DPI. Also be sure you're using the greyscale setting and not one of the dithering alternatives. Mel Shear !rex!fleet!mel
bradlee@cg-atla.agfa.com (Rob Bradlee) (12/06/89)
In article <8912020336.AA21356@crayola.cs.UMD.EDU> meuchen@GRAD1.CIS.UPENN.EDU (Paul Eric Menchen) writes: > >In article _ frontah@PAWL.RPI.EDU (David J Sotnick) writes: >>I have a two-page document in Pagemaker on the Mac and I am trying >>to get my grey-scale 256 shade 300 dpi scans to come out looking like a real >>picture on the Linotronic 300 set to 2540 Lines/inch. >> >>I tried to do this and I got a terrible result on my scans - they were all >>screened really badly. They had dense dots all over them. What am I doing wrong? >> >My printer can't take more than about 90 lpi because it can't be >resolved for printing. Lpi and dpi are not the same thing. >Try setting your lpi to somthing like 90, maybe a little less, and then >print. If you want finer detail and don't need to copy or print, try >something a little higher, but not 2540. If you do need to print, >talk to your printer and ask what he can take. Ah, the great confusion between SPOTS per inch and DOTS per inch. The printer's dots created by the screening process are described in lines per inch (screen ruling), while the resolution of the printer is best described as spots per inch. The latter are used to create the former. David's problem is not that he is outputting at 2540 spi (or dpi if you want to stay confused), but somewhere else. First, I missed the original article so I don't know how he obtained the image (from a scanner?), but the lousy output might really be lousy input. If the image is known to be good (i.e. someone made it look right on another system), then something my indeed be wrong in the output part. Is the image being scaled up at output time? What screen ruling and angle did you choose? Of course, as a good employee of AGFA Compugraphic, I can tell you the real problem is the choice of imagesetter. Send me a disk David and I'll see if it looks better on one of our machines. F o d d e r Rob -- Rob Bradlee w:(508)-658-5600 X5153 h:(617)-944-5595 AGFA Compugraphic Division. ...!{decvax,samsung}!cg-atla!bradlee 200 Ballardvale St. Wilmington, Mass. 01887 The Nordic Way: Ski till it hurts!