rgb2pct man page on Kali

Man page or keyword search:  
man Server   9211 pages
apropos Keyword Search (all sections)
Output format
Kali logo
[printable version]

rgb2pct(1)							    rgb2pct(1)

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

SYNOPSIS
       rgb2pct.py [-n colors | -pct palette_file] [-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.

       -pct palette_file:
	   Extract the color table from palette_file instead of computing it.
	   Can be used to have a consistent color table for multiple files.
	   The palette_file must be a raster file in a GDAL supported format
	   with a palette.

       -of format:
	   Format to generated (defaults to GeoTIFF). Same semantics as the
	   -of flag for gdal_translate. Only output formats supporting pseudo-
	   color 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.

EXAMPLE
       If it is desired to hand create the palette, likely the simplest text
       format is the GDAL VRT format. In the following example a VRT was
       created in a text editor with a small 4 color palette with the RGBA
       colors 238/238/238/255, 237/237/237/255, 236/236/236/255 and
       229/229/229/255.

       % rgb2pct.py -pct palette.vrt rgb.tif pseudo-colored.tif
       % more < palette.vrt
       <VRTDataset rasterXSize="226" rasterYSize="271">
	 <VRTRasterBand dataType="Byte" band="1">
	   <ColorInterp>Palette</ColorInterp>
	   <ColorTable>
	     <Entry c1="238" c2="238" c3="238" c4="255"/>
	     <Entry c1="237" c2="237" c3="237" c4="255"/>
	     <Entry c1="236" c2="236" c3="236" c4="255"/>
	     <Entry c1="229" c2="229" c3="229" c4="255"/>
	   </ColorTable>
	 </VRTRasterBand>
       </VRTDataset>

AUTHOR
       Frank Warmerdam warmerdam@pobox.com

GDAL				Sun Dec 17 2017			    rgb2pct(1)
[top]

List of man pages available for Kali

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net