Updated: 13 July 1991
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ppmtopj - convert a PPM image to an HP PaintJet file


ppmtopj [-gamma val] [-xpos val] [-ypos val] [-back {dark|lite}] [-rle] [-center] [-render { none | snap | bw | dither | diffuse | monodither | monodiffuse | clusterdither | monoclusterdither }] [ppmfile]


This program is part of Netpbm.

ppmtopj reads a PPM image as input and converts it into a format suitable to be printed by an HP PaintJet printer.

For best results, the input file should be in 8-color RGB form; i.e. it should have only the 8 binary combinations of full-on and full-off primaries. You could convert your input to this format like this:

    pamseq 3 1 testimg.ppm >8color.pam
    pnmremap -map 8color.pam testimg.pam | ppmtopj
Or you could use
    ppmdither -red 2 -green 2 -blue 2


Run length encode the image. (This can result in larger images)
Enhance the foreground by indicating if the background is light or dark compared to the foreground.
-render alg
Use an internal rendering algorithm (default dither).
-gamma int
Gamma correct the image using the integer int as a gamma (default 0).
Center the image to an 8.5 by 11 page
-xpos pos
Move by pos pixels in the x direction.
-ypos pos
Move by pos pixels in the y direction.


HP PaintJet XL Color Graphics Printer User's Guide, pnmtopclxl, pjtoppm, pamdepth, pnmremap, pamseq, ppmdither, pbmtolj, ppmtolj, ppmtopjxl, thinkjettopbm, ppm


Copyright (C) 1991 by Christos Zoulas.

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