avs2ps(1)
NAME
avs2ps - convert AVS image input on stdin to monochrome PostScript on
stdout
SYNOPSIS
- avs2ps [-b] [-dpi xxx] < infile.avs > outfile.ps
- avs2ps converts a 24-bit color image file in AVS format into a dithered monochrome PostScript image with the same number of pixels as the input file. avs2ps may be used as a filter for the output of the render program to produce a PostScript file directly.
- avs2ps is machine independent, and does not impose restrictions on the tile size in the original image. It supersedes the programs molras3d and hdither in the viewtools package.
EXAMPLES
- Produce an unbordered black & white image suitable for printing on a
300 dpi PostScript printer. - render < infile.r3d | avs2ps > image.ps
- Add a border, and prepare image for a 400dpi printer
render < infile.r3d | avs2ps -b -dpi 400 > image.ps
OPTIONS
-b
Draw a border around the figure. By default avs2ps will produce a borderless image 0.5 inch in from the bottom left of the page.
-dpi xxx
By default avs2ps writes header records into the PostScript output file
which are correct for a 300dpi printer (e.g. an HP IIIsi). If there is
a mis-match between the header records and the actual resolution of the
printer the image quality is substantially degraded. This option
allows one to specify a different printer resolution (e.g. -dpi 400 for
a Next printer, or -dpi 95 for GhostScript on a 1280x1024 workstation
screen).
DESCRIPTION
avs2ps converts the input stream to a grey scale image and then applies
an empirical algorithm for dithering and error propagation to produce a
monochrome output image.
SOURCE
- anonymous ftp site:
- ftp.bmsc.washington.edu
- web URL:
- http://www.bmsc.washington.edu/raster3d/raster3d.html
- contact:
- Ethan A Merritt
University of Washington, Seattle WA 98195
merritt@u.washington.edu
SEE ALSO
render(l), raster3d(l), avs
AUTHORS
- Ethan A Merritt.
- Dithering algorithm derived from code by Randy Read and Albert
- Berghuis.