Date: Tue, 3 Feb 1998 10:45:11 +0100 (MET) From: Werner Griessl <werner@btp1da.phy.uni-bayreuth.de> To: asami@cs.berkeley.edu (Satoshi Asami) Cc: ports@FreeBSD.ORG Subject: Re: converting raster file to postscript Message-ID: <199802030945.KAA18698@btp1da.phy.uni-bayreuth.de> In-Reply-To: <199802021649.IAA21718@silvia.HIP.Berkeley.EDU> from Satoshi Asami at "Feb 2, 98 08:49:12 am"
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> Hello guys, > > I recently purchased an Epson Stylus Color 600, and would like to > print some photo-quality images. Thanks to the handbook, I got > ghostscript5 to function as a filter, but the images look rather > crappy. > > I can actually see the pixels (which is not supposed to happen, at > least without an aid of a microscope!), so I think the printer (or > ghostscript) is dithering the image. > > I suspect the problem is that I don't know how to generate > high-resolution color postscript files. I used pnmtops, but the > "-dpi" option appears to be a no-op: > > === > >> djpeg -ppm voyage.jpg | pnmtops -dpi 360 | wc > pnmtops: warning, image too large for page, rescaling to 0.771088 > pnmtops: writing color PostScript... > 70526 70574 4300910 > >> djpeg -ppm voyage.jpg | pnmtops -dpi 720 | wc > pnmtops: warning, image too large for page, rescaling to 0.771088 > pnmtops: writing color PostScript... > 70526 70574 4300910 > >> djpeg -ppm voyage.jpg | pnmfile > stdin: PPM raw, 754 by 935 maxval 255 > Broken pipe > >> dc > 754 935 *p > 704990 > === > > Well, if I'm printing this pathetic picture at 720dpi, it should show > up as about 1 inch by 1.2 inches. It shouldn't be too large for a > letter-size paper. :) > > I also tried to "save" the image using netscape, with pretty much the > same quality as a result. (But that's expected, as I can't tell > netscape to change the resolution and it probably just tries to scale > the image for the entire paper.) > > Satoshi > I'm also interested, have the same printer at home. Werner
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