TIFFMEDIAN
Section: User Commands (1)
Updated: May 2, 1990
Index
Return to Main Contents
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.
SEE ALSO
pal2rgb(1),
tiffinfo(1),
tiffcp(1),
tiffcmp(1),
libtiff(3)
"Color Image Quantization for Frame Buffer Display", Paul
Heckbert, SIGGRAPH proceedings, 1982, pp. 297-307.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- NOTES
-
- SEE ALSO
-
This document was created by
man2html,
using the manual pages.
Time: 01:45:57 GMT, February 01, 2023