dcmdjpeg(1)                                                        dcmdjpeg(1)



NAME
       dcmdjpeg - Decode JPEG-compressed DICOM file

SYNOPSIS
       dcmdjpeg [options] dcmfile-in dcmfile-out


DESCRIPTION
       The  dcmdjpeg  utility  reads a JPEG-compressed DICOM image (dicomfile-
       in), decompresses the JPEG data (i. e. conversion  to  a  native  DICOM
       transfer  syntax)  and  writes  the  converted  image to an output file
       (dicomfile-out).

PARAMETERS
       dcmfile-in   DICOM input filename to be converted

       dcmfile-out  DICOM output filename


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

               --version
                 print version information and exit

         -v    --verbose
                 verbose mode, print processing details

         -d    --debug
                 debug mode, print debug information


   processing options
       color space conversion options:

         +cp   --conv-photometric
                 convert if YCbCr photom. interpr. (default)

         # If the compressed image uses YBR_FULL or YBR_FULL_422 photometric
         # interpretation, convert to RGB during decompression.

         +cl   --conv-lossy
                 convert YCbCr to RGB if lossy JPEG

         # If the compressed image is encoded in lossy JPEG, assume YCbCr
         # color model and convert to RGB.

         +ca   --conv-always
                 always convert YCbCr to RGB

         # If the compressed image is a color image, assume YCbCr color model
         # and convert to RGB.

         +cn   --conv-never
                 never convert color space

         # Never convert color space during decompression.

       planar configuration options:

         +pa   --planar-auto
                 automatically determine planar configuration
                 from SOP class and color space (default)

         # If the compressed image is a color image, store in color-by-plane
         # planar configuration if required by the SOP class and photometric
         # interpretation. Hardcopy Color images are always stored color-by-
         # plane, and the revised Ultrasound image objects are stored color-by-
         # plane if the color model is YBR_FULL.  Everything else is stored
         # color-by-pixel.

         +px   --color-by-pixel
                 always store color-by-pixel

         # If the compressed image is a color image, store in color-by-pixel
         # planar configuration.

         +pl   --color-by-plane
                 always store color-by-plane

         # If the compressed image is a color image, store in color-by-plane
         # planar configuration.

       SOP Instance UID options:

         +ud   --uid-default
                 keep same SOP Instance UID (default)

         #  Never assigns a new SOP instance UID.

         +ua   --uid-always
                 always assign new UID

         # Always assigns a new SOP instance 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:

         +te   --write-xfer-little
                 write with explicit VR little endian (default)

         +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


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) 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
       share/data/dumppat.txt).

ENVIRONMENT
       The dcmdjpeg 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.

SEE ALSO
       dcmcjpeg(1)

COPYRIGHT
       Copyright (C) 2001-2004 by Kuratorium OFFIS e.V.,  Escherweg  2,  26121
       Oldenburg, Germany.



OFFIS DCMTK                       27 May 2004                      dcmdjpeg(1)
