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dcmquant(1)			  OFFIS DCMTK			   dcmquant(1)

NAME
       dcmquant - Convert DICOM color images to palette color

SYNOPSIS
       dcmquant [options] dcmfile-in dcmfile-out

DESCRIPTION
       The  dcmquant  utility  reads  a	 DICOM color image, computes a palette
       color look-up table of the desired size for this image  (based  on  the
       median cut algorithm published by Paul Heckbert) and converts the color
       image into a DICOM palette color image.

PARAMETERS
       dcmfile-in   DICOM input filename to be converted

       dcmfile-out  DICOM output filename to be written

OPTIONS
   general options
	 -h   --help
		print this help text and exit

	      --version
		print version information and exit

	      --arguments
		print expanded command line arguments

	 -q   --quiet
		quiet mode, print no warnings and errors

	 -v   --verbose
		verbose mode, print processing details

	 -d   --debug
		debug mode, print debug information

	 -ll  --log-level  [l]evel: string constant
		(fatal, error, warn, info, debug, trace)
		use level l for the logger

	 -lc  --log-config  [f]ilename: string
		use config file f for the logger

   input options
       input file format:

	 +f   --read-file
		read file format or data set (default)

	 +fo  --read-file-only
		read file format only

	 -f   --read-dataset
		read data set without file meta information

       input transfer syntax:

	 -t=  --read-xfer-auto
		use TS recognition (default)

	 -td  --read-xfer-detect
		ignore TS specified in the file meta header

	 -te  --read-xfer-little
		read with explicit VR little endian TS

	 -tb  --read-xfer-big
		read with explicit VR big endian TS

	 -ti  --read-xfer-implicit
		read with implicit VR little endian TS

   processing options
       frame selection:

	 +F   --frame  [n]umber: integer
		select specified frame

	 +Fa  --all-frames
		select all frames (default)

       compatibility:

	 +Mp  --accept-palettes
		accept incorrect palette attribute tags
		(0028,111x) and (0028,121x)

       median cut dimension selection:

	 +Dr  --mc-dimension-rgb
		max dimension from RGB range (default)

	 +Dl  --mc-dimension-lum
		max dimension from luminance

       median cut representative color selection:

	 +Cb  --mc-color-avgbox
		average colors in box (default)

	 +Cp  --mc-color-avgpixel
		average pixels in box

	 +Cc  --mc-color-center
		select center of box

       color palette creation:

	 +pw  --write-ow
		write Palette LUT as OW instead of US

	 +pe  --lut-entries-word
		write Palette LUT with 16-bit entries

	 +pf  --floyd-steinberg
		use Floyd-Steinberg error diffusion

	 +pc  --colors	number of colors: 2..65536 (default 256)
		number of colors to quantize to

       SOP Class UID:

	 +cd  --class-default
		keep SOP Class UID (default)

	 +cs  --class-sc
		convert to Secondary Capture Image
		(implies --uid-always)

       SOP Instance UID:

	 +ua  --uid-always
		always assign new UID (default)

	 +un  --uid-never
		never assign new UID

   output options
       output file format:

	 +F   --write-file
		write file format (default)

	 -F   --write-dataset
		write data set without file meta information

       output transfer syntax:

	 +t=  --write-xfer-same
		write with same TS as input (default)

	 +te  --write-xfer-little
		write with explicit VR little endian TS

	 +tb  --write-xfer-big
		write with explicit VR big endian TS

	 +ti  --write-xfer-implicit
		write with implicit VR little endian TS

       post-1993 value representations:

	 +u   --enable-new-vr
		enable support for new VRs (UN/UT) (default)

	 -u   --disable-new-vr
		disable support for new VRs, convert to OB

       group length encoding:

	 +g=  --group-length-recalc
		recalculate group lengths if present (default)

	 +g   --group-length-create
		always write with group length elements

	 -g   --group-length-remove
		always write without group length elements

       length encoding in sequences and items:

	 +e   --length-explicit
		write with explicit lengths (default)

	 -e   --length-undefined
		write with undefined lengths

       data set trailing padding (not with --write-dataset):

	 -p=  --padding-retain
		do not change padding
		(default if not --write-dataset)

	 -p   --padding-off
		no padding (implicit if --write-dataset)

	 +p   --padding-create	[f]ile-pad [i]tem-pad: integer
		align file on multiple of f bytes and items on
		multiple of i bytes

LOGGING
       The level of logging output of  the  various  command  line  tools  and
       underlying  libraries  can  be  specified by the user. By default, only
       errors and warnings are written to the  standard	 error	stream.	 Using
       option  --verbose  also	informational messages like processing details
       are reported. Option --debug can be used to get	more  details  on  the
       internal	 activity,  e.g.  for debugging purposes. Other logging levels
       can be selected using option --log-level. In --quiet  mode  only	 fatal
       errors  are reported. In such very severe error events, the application
       will usually terminate. For  more  details  on  the  different  logging
       levels, see documentation of module 'oflog'.

       In  case	 the logging output should be written to file (optionally with
       logfile rotation), to syslog (Unix) or the event log  (Windows)	option
       --log-config  can  be  used.  This  configuration  file also allows for
       directing only certain messages to a particular output stream  and  for
       filtering  certain  messages  based  on the module or application where
       they are generated.  An	example	 configuration	file  is  provided  in
       <etcdir>/logger.cfg).

COMMAND LINE
       All  command  line  tools  use  the  following notation for parameters:
       square brackets enclose optional	 values	 (0-1),	 three	trailing  dots
       indicate	 that multiple values are allowed (1-n), a combination of both
       means 0 to n values.

       Command line options are distinguished from parameters by a leading '+'
       or  '-' sign, respectively. Usually, order and position of command line
       options are arbitrary (i.e. they	 can  appear  anywhere).  However,  if
       options	are  mutually exclusive the rightmost appearance is used. This
       behaviour conforms to the standard  evaluation  rules  of  common  Unix
       shells.

       In  addition,  one  or more command files can be specified using an '@'
       sign as a prefix to the filename (e.g. @command.txt).  Such  a  command
       argument	 is  replaced  by  the	content of the corresponding text file
       (multiple whitespaces are treated as a  single  separator  unless  they
       appear  between	two  quotation marks) prior to any further evaluation.
       Please note that a command file cannot contain  another	command	 file.
       This   simple   but  effective  approach	 allows	 to  summarize	common
       combinations of options/parameters and  avoids  longish	and  confusing
       command lines (an example is provided in file <datadir>/dumppat.txt).

ENVIRONMENT
       The  dcmquant  utility  will  attempt  to  load DICOM data dictionaries
       specified in the DCMDICTPATH environment variable. By default, i.e.  if
       the   DCMDICTPATH   environment	 variable   is	 not   set,  the  file
       <datadir>/dicom.dic will be loaded unless the dictionary is built  into
       the application (default for Windows).

       The   default   behaviour  should  be  preferred	 and  the  DCMDICTPATH
       environment variable only used when alternative data  dictionaries  are
       required.  The  DCMDICTPATH environment variable has the same format as
       the Unix shell PATH variable in that a colon (':')  separates  entries.
       On  Windows systems, a semicolon (';') is used as a separator. The data
       dictionary code will  attempt  to  load	each  file  specified  in  the
       DCMDICTPATH  environment variable. It is an error if no data dictionary
       can be loaded.

COPYRIGHT
       Copyright (C) 2001-2010 by OFFIS e.V., Escherweg	 2,  26121  Oldenburg,
       Germany.

Version 3.6.0			  6 Jan 2011			   dcmquant(1)
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