diff -r 000000000000 -r 1918ee327afb src/3rdparty/libtiff/html/man/tiffmedian.1.html --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/3rdparty/libtiff/html/man/tiffmedian.1.html Mon Jan 11 14:00:40 2010 +0000 @@ -0,0 +1,183 @@ + + + + + + +TIFFMEDIAN + + + +

TIFFMEDIAN

+NAME
+SYNOPSIS
+DESCRIPTION
+OPTIONS
+NOTES
+SEE ALSO
+ +
+ +

NAME

+ + + + + +
+

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

+
+ +

SYNOPSIS

+ + + + + +
+

tiffmedian [ options ] input.tif +output.tif

+
+ +

DESCRIPTION

+ + + + + +
+

tiffmedian applies the median cut algorithm to an +RGB image in input.tif to generate a +palette image that is written to output.tif. The +generated colormap has, by default, 256 entries. The image +data is quantized by mapping each pixel to the closest color +values in the colormap.

+
+ +

OPTIONS

+ + + + + + + + +
+ +

−c

+		 + +

Specify the compression to use for data written to the +output file: none for no compression, packbits +for PackBits compression, lzw for Lempel-Ziv & +Welch compression, and zip for Deflate compression. +By default tiffmedian will compress data according to +the value of the Compression tag found in the source +file.

+		 +
+ + + + + +
+

LZW compression can be specified together +with a predictor value. A predictor value of 2 causes +each scanline of the output image to undergo horizontal +differencing before it is encoded; a value of 1 forces each +scanline to be encoded without differencing. LZW-specific +options are specified by appending a +‘‘:’’-separated list to the +‘‘lzw’’ option; e.g. −c +lzw:2 for LZW compression with horizontal +differencing.

+
+ + + + + + + + + + + + + + + + + + + + +
+ +

−C

+		 + +

Specify the number of entries to use in the generated +colormap. By default all 256 entries/colors are used.

+		 +
+ +

−f

+		 + +

Apply Floyd-Steinberg dithering before selecting a +colormap entry.

+		 +
+ +

−r

+		 + +

Specify the number of rows (scanlines) in each strip of +data written to the output file. By default, +tiffmedian attempts to set the rows/strip that no +more than 8 kilobytes of data appear in a strip.

+		 +
+ +

NOTES

+ + + + + +
+

This program is derived from Paul Heckbert’s +median program.

+
+ +

SEE ALSO

+ + + + + +
+

pal2rgb(1), tiffinfo(1), tiffcp(1), +tiffcmp(1), libtiff(3TIFF)

+ +

Color Image Quantization for Frame Buffer Display, +Paul Heckbert, SIGGRAPH proceedings, 1982, pp. 297-307.

+ +

Libtiff library home page: +http://www.remotesensing.org/libtiff/

+
+
+ +