TIFFMEDIAN

Section: User Commands (1)
Updated: May 2, 1990
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NAME

tiffmedian - apply the median cut algorithm to data in a TIFF file

SYNOPSIS

tiffmedian [ -c size ] [ -f ] [ -none ] [ -lzw ] [ -packbits ] [ -rowsperstrip n ] file1 file2

DESCRIPTION

Tiffmedian applys the median cut algorithm to an RGB image in file1 to generate a palette image that is written to file2. The colormap generated has, by default, 256 entries; this may be modified with the -c option. By default, the image data is quantized by mapping each pixel to the closest color values in the colormap. If the -f option is specified, Floyd-Steinberg dithering is done before selecting a colormap entry. The remaining options are used to specify a compression algorithm to use in creating the output file or the number of rows (scanlines) to place in each data strip in the output file. By default, the compression algorithm is derived from the input file and the rows per strip is calculated so that each strip is no more than 8 kilobytes.

NOTES

This program is derived from Paul Heckbert's median program.