rgb2pct

Langue: en

Autres versions - même langue

Version: 331115 (ubuntu - 24/10/10)

Section: 1 (Commandes utilisateur)

Sommaire

NAME

rgb2pct - .TH "rgb2pct" 1 "Wed Sep 29 2010" "GDAL"

NAME

rgb2pct - Convert a 24bit RGB image to 8bit paletted

SYNOPSIS

 
 rgb2pct.py [-n colors] [-of format] source_file dest_file

DESCRIPTION

This utility will compute an optimal pseudo-color table for a given RGB image using a median cut algorithm on a downsampled RGB histogram. Then it converts the image into a pseudo-colored image using the color table. This conversion utilizes Floyd-Steinberg dithering (error diffusion) to maximize output image visual quality.

-n colors:
Select the number of colors in the generated color table. Defaults to 256. Must be between 2 and 256.
-of format:
Format to generated (defaults to GeoTIFF). Same semantics as the -of flag for gdal_translate. Only output formats supporting pseudocolor tables should be used.
source_file:
The input RGB file.
dest_file:
The output pseudo-colored file that will be created.

NOTE: rgb2pct.py is a Python script, and will only work if GDAL was built with Python support.

AUTHORS

Frank Warmerdam <warmerdam@pobox.com>