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This is the command dcmscale that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

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

--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 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..4, 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:

+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

NOTES


The following preferred interpolation algorithms can be selected using the --interpolate
option:

· 1 = free scaling algorithm with interpolation from pbmplus toolkit
· 2 = free scaling algorithm with interpolation from c't magazine
· 3 = magnification algorithm with bilinear interpolation from Eduard Stanescu
· 4 = magnification algorithm with bicubic interpolation from Eduard Stanescu

LOGGING


The level of logging output of the various command line tools and underlying libraries can
be specified by the user. By default, only errors and warnings are written to the standard
error stream. Using option --verbose also informational messages like processing details
are reported. Option --debug can be used to get more details on the internal activity,
e.g. for debugging purposes. Other logging levels can be selected using option --log-
level. In --quiet mode only fatal errors are reported. In such very severe error events,
the application will usually terminate. For more details on the different logging levels,
see documentation of module 'oflog'.
In case the logging output should be written to file (optionally with logfile rotation),
to syslog (Unix) or the event log (Windows) option --log-config can be used. This
configuration file also allows for directing only certain messages to a particular output
stream and for filtering certain messages based on the module or application where they
are generated. An example configuration file is provided in <etcdir>/logger.cfg.

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 behavior 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 unless
they appear between two quotation marks) prior to any further evaluation. Please note that
a command file cannot contain another command file. This simple but effective approach
allows one to summarize common combinations of options/parameters and avoids longish and
confusing command lines (an example is provided in file <datadir>/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 <datadir>/dicom.dic will be loaded unless the dictionary is built
into the application (default for Windows).
The default behavior 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. On Windows systems, a semicolon (';') is used as a separator. 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) 2002-2014 by OFFIS e.V., Escherweg 2, 26121 Oldenburg, Germany.

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