Man page or keyword search:   man All Sections 1 - General Commands 2 - System Calls 3 - Subroutines, Functions 4 - Special Files 5 - File Formats 6 - Games and Screensavers 7 - Macros and Conventions 8 - Maintenence Commands 9 - Kernel Interface New Commands Server 4.4BSD AIX Alpinelinux Archlinux Aros BSDOS BSDi Bifrost CentOS Cygwin Darwin Debian DigitalUNIX DragonFly ElementaryOS Fedora FreeBSD Gentoo GhostBSD HP-UX Haiku Hurd IRIX Inferno JazzOS Kali Knoppix LinuxMint MacOSX Mageia Mandriva Manjaro Minix MirBSD NeXTSTEP NetBSD OPENSTEP OSF1 OpenBSD OpenDarwin OpenIndiana OpenMandriva OpenServer OpenSuSE OpenVMS Oracle PC-BSD Peanut Pidora Plan9 QNX Raspbian RedHat Scientific Slackware SmartOS Solaris SuSE SunOS Syllable Tru64 UNIXv7 Ubuntu Ultrix UnixWare Xenix YellowDog aLinux   20441 pages apropos Keyword Search (all sections) Output format html ascii pdf view pdf save postscript

tiffmedian(1)			 User Commands			 tiffmedian(1)

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 col‐
       ormap.

OPTIONS
       The following options are supported:

       -c	       Specify	a compression scheme to use when writing image
		       data:

		       -c lzw		       Lempel-Ziv and Welch algorithm.

		       -c none		       No compression.

		       -c packbits	       PackBits compression algorithm.

		       -c zip		       Deflate compression algorithm.

		       If no  compression-related  option  is  specified,  the
		       input-file compression algorithm is used.

       -C	       Specify	the  number of entries to use in the generated
		       colormap. By default, all 256  entries  or  colors  are
		       used.

       -f	       Apply Floyd-Steinberg dithering before selecting a col‐
		       ormap entry.

       -r	       Write data with a specified number of rows  per	strip.
		       By default, the number of rows per strip is selected so
		       that each strip is approximately 8 kilobytes.

OPERANDS
       The following operands are supported:

       input.tif       The name of the input TIFF file.

       output.tif      The name of the output file.

EXTENDED DESCRIPTION
       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 being encoded. A predictor value
       of 1 forces each scanline to be encoded without differencing.

       LZW-specific  options are specified by appending a colon-separated list
       to the lzw option. For example, specify -c lzw:2	 for  LZW  compression
       with horizontal differencing.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       ┌─────────────────────────────┬─────────────────────────────┐
       │      ATTRIBUTE TYPE	     │	    ATTRIBUTE VALUE	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Availability		     │image/library/libtiff	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Interface stability	     │Uncommitted		   │
       └─────────────────────────────┴─────────────────────────────┘

SEE ALSO
       Color  Image Quantization for Frame Buffer Display, Paul Heckbert, SIG‐
       GRAPH proceedings, 1982, pp. 297-307.

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

NOTES
       Updated by Breda McColgan, Sun Microsystems Inc., 2004.

SunOS 5.11			  26 Mar 2004			 tiffmedian(1)

Vote for polarhome