Date: Mon, 2 Feb 1998 08:49:12 -0800 (PST) From: asami@cs.berkeley.edu (Satoshi Asami) To: ports@FreeBSD.ORG Subject: converting raster file to postscript Message-ID: <199802021649.IAA21718@silvia.HIP.Berkeley.EDU>
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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
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