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       dcmscale - Scale DICOM images


       dcmscale [options] dcmfile-in dcmfile-out


       The  dcmscale  utility  reads a DICOM image, scales it according to the
       command line settings and writes back the  DICOM  image.  This  utility
       only supports uncompressed and RLE compressed DICOM images.


       dcmfile-in   DICOM input filename to be scaled

       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

         -d    --debug
                 debug mode, print debug information

   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

         +a    --recognize-aspect
                 recognize pixel aspect ratio (default)

         -a    --ignore-aspect
                 ignore pixel aspect ratio when scaling

         +i    --interpolate  [n]umber of algorithm : integer
                 use interpolation when scaling (1..2, default: 1)

         -i    --no-interpolation
                 no interpolation when scaling

         -S    --no-scaling
                 no scaling, ignore pixel aspect ratio (default)

         +Sxf  --scale-x-factor  [f]actor : float
                 scale x axis by factor, auto-compute y axis

         +Syf  --scale-y-factor  [f]actor : float
                 scale y axis by factor, auto-compute x axis

         +Sxv  --scale-x-size  [n]umber : integer
                 scale x axis to n pixels, auto-compute y axis

         +Syv  --scale-y-size  [n]umber : integer
                 scale y axis to n pixels, auto-compute x axis

       other transformations:
         +C    --clip-region  [l]eft [t]op [w]idth [h]eight : integer
                 clip rectangular image region (l, t, w, h)

       SOP Instance UID options:

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

         +un   --uid-never
                 never assign 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:

         +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  dcmscale  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)  2002-2005  by Kuratorium OFFIS e.V., Escherweg 2, 26121
       Oldenburg, Germany.