From c0b89ac5bfb90835ef01573267020e42d4fe070c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rg=20Frings-F=C3=BCrst?= Date: Sun, 23 Aug 2015 12:17:05 +0200 Subject: Imported Upstream version 1.8.0 --- tiff/html/man/tiffdither.1.html | 183 ---------------------------------------- 1 file changed, 183 deletions(-) delete mode 100644 tiff/html/man/tiffdither.1.html (limited to 'tiff/html/man/tiffdither.1.html') diff --git a/tiff/html/man/tiffdither.1.html b/tiff/html/man/tiffdither.1.html deleted file mode 100644 index 2427a90..0000000 --- a/tiff/html/man/tiffdither.1.html +++ /dev/null @@ -1,183 +0,0 @@ - - - - - - -TIFFDITHER - - - -

TIFFDITHER

-NAME
-SYNOPSIS
-DESCRIPTION
-OPTIONS
-NOTES
-SEE ALSO
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- -

NAME

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tiffdither − convert a greyscale image to bilevel -using dithering

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SYNOPSIS

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tiffdither [ options ] input.tif -output.tif

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DESCRIPTION

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tiffdither converts a single channel 8-bit -greyscale image to a bilevel image using Floyd-Steinberg -error propagation with thresholding.

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OPTIONS

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−c

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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, zip for Deflate compression, -g3 for CCITT Group 3 (T.4) compression, and g4 -for CCITT Group 4 (T.6) compression. By default -tiffdither will compress data according to the value -of the Compression tag found in the source file.

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The CCITT Group 3 and Group 4 compression -algorithms can only be used with bilevel data.

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Group 3 compression can be specified together with -several T.4-specific options: 1d for 1-dimensional -encoding, 2d for 2-dimensional encoding, and -fill to force each encoded scanline to be zero-filled -so that the terminating EOL code lies on a byte boundary. -Group 3-specific options are specified by appending a -‘‘:’’-separated list to the -‘‘g3’’ option; e.g. −c -g3:2d:fill to get 2D-encoded data with byte-aligned EOL -codes.

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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.

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	- - −f -		- - Specify the bit fill order to use in writing output -data. By default, tiffdither will create a new file -with the same fill order as the original. Specifying -−f lsb2msb will force data to be written with -the FillOrder tag set to LSB2MSB , -while −f msb2lsb will force data to be written -with the Fill- Order tag set to MSB2LSB -. -	-
	- - −t -		- - Set the threshold value for dithering. By default the -threshold value is 128. -	-

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NOTES

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The dither algorithm is taken from the -tiffmedian(1) program (written by Paul Heckbert).

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