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(1).

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