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       dcmquant - Convert DICOM color images to palette color


       dcmquant [options] dcmfile-in dcmfile-out


       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.


       dcmfile-in   DICOM input filename to be converted

       dcmfile-out  DICOM output filename to be written


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

                print version information and exit

         -v   --verbose
                verbose mode, print processing details

   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 options:

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

       median cut dimension selection options:

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

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

       median cut representative color selection options:

         +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 options:

         +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 options:

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

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

       SOP Instance UID options:

         +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


       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

       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) 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


       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
       <PREFIX>/lib/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.
       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 (C) 2001-2005 by Kuratorium OFFIS e.V.,  Escherweg  2,  26121
       Oldenburg, Germany.