ppmtopj

Updated: 13 July 1991
Table Of Contents

NAME

ppmtopj - convert a PPM image to an HP PaintJet file

SYNOPSIS

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

DESCRIPTION

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

OPTIONS

In addition to the options common to all programs based on libnetpbm (most notably -quiet, see Common Options), ppmtopj recognizes the following command line options:

-rle: Run length encode the image. (This can result in larger images)
-back: 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: 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.