PPMQVGASection: User Commands (1)
Index Return to Main Contents
NAMEppmqvga - 8 plane quantization
SYNOPSISppmqvga [ options ] [ input file ]
DESCRIPTIONppmqvga quantizes PPM files to 8 planes, with optional Floyd-Steinberg dithering. Input is a PPM file from the file named, or standard input of no file is provided.
Options-d dither. Apply Floyd-Steinberg dithering to the data
-q quiet. Produces no progress reporting, and no terminal output unless and error occurs.
-v verbose. Produces additional output describing the number of colors found, and some information on the resulting mapping. May be repeated to generate loads of internal table output, but generally only useful once.
EXAMPLESppmqvga -d my_image.ppm | ppmtogif >my_image.gif
DIAGNOSTICSError messages if problems, various levels of optional progress reporting.
AUTHOROriginal by Lyle Rains (email@example.com) as ppmq256 and ppmq256fs combined, documented, and enhanced by Bill Davidsen (firstname.lastname@example.org)
CopyrightCopyright 1991,1992 by Bill Davidsen, all rights reserved. The program and documentation may be freely distributed by anyone in source or binary format. Please clearly note any changes.