dcmdjpeg - Man Page

  -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 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

  # This option allows one to decompress JPEG compressed DICOM objects that
  # have been stored as dataset without meta-header. Such a thing should
  # not exist since the transfer syntax cannot be reliably determined,
  # without meta-header but unfortunately it does.

color space conversion:

  +cp   --conv-photometric
          convert if YCbCr photometric interpretation (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.

  +cg   --conv-guess
          convert to RGB if YCbCr is guessed by library

  # If the underlying JPEG library "guesses" the color space of the
  # compressed image to be YCbCr, convert to RGB.

  +cgl  --conv-guess-lossy
          convert to RGB if lossy JPEG and YCbCr is
          guessed by the underlying JPEG library

  # If the compressed image is encoded in lossy JPEG and the underlying
  # JPEG library "guesses" the color space to be YCbCr, 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 YCbCr to RGB

  # Never convert color space from YCbCr to RGB during decompression.
  # Note that a conversion from YBR_FULL_422 to YBR_FULL will still take
  # place if the source images has been compressed with subsampling.

planar configuration:

  +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:

  +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.

workaround options for incorrect JPEG encodings:

  +w6   --workaround-pred6
          enable workaround for JPEG lossless images
          with overflow in predictor 6

  # DICOM images with 16 bits/pixel have been observed "in the wild"
  # that are compressed with lossless JPEG and need special handling
  # because the encoder produced an 16-bit integer overflow in predictor
  # 6, which needs to be compensated (reproduced) during decompression.
  # This flag enables a correct decompression of such faulty images, but
  # at the same time will cause an incorrect decompression of correctly
  # compressed images. Use with care.

  +wi   --workaround-incpl
          enable workaround for incomplete JPEG data

  # This option causes dcmjpeg to ignore incomplete JPEG data
  # at the end of a compressed fragment and to start decompressing
  # the next frame from the next fragment (if any). This permits
  # images with incomplete JPEG data to be decoded.

  +wc   --workaround-cornell
          enable workaround for 16-bit JPEG lossless
          Cornell images with Huffman table overflow

  # One of the first open-source implementations of lossless JPEG
  # compression, the "Cornell" library, has a well-known bug that leads
  # to invalid values in the Huffmann table when images with 16 bit/sample
  # are compressed. This flag enables a workaround that permits such
  # images to be decoded correctly..fi

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