NAME
dcmscale - Scale DICOM images
SYNOPSIS
dcmscale [options] dcmfile-in dcmfile-out
DESCRIPTION
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.
PARAMETERS
dcmfile-in DICOM input filename to be scaled
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
-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
scaling:
+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
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 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
Copyright (C) 2002-2005 by Kuratorium OFFIS e.V., Escherweg 2, 26121
Oldenburg, Germany.