NAME
dcmmklut - Create DICOM look-up tables
SYNOPSIS
dcmmklut [options] dcmimg-out
DESCRIPTION
The dcmmklut utility allows to create a variety of DICOM Modality,
Presentation and VOI look-up tables (LUT) and is intended for the
creation of test images. The utility is able to read an existing DICOM
image file, create a look up table according to the command line
options, and write the new object back to file. It is also possible to
create a new object containing the specified LUT without reading an
existing DICOM image file. This is e.g. useful to simply store
different look-up tables in a DICOM-like structure. As a default the
output file is encoded with the same transfer syntax used for the input
file, but the transfer syntax can also be specified as a command line
option.
The LUT data can be derived from the shape of a gamma curve (default
for the gamma factor is 1) or imported from a file (currently the MAP
format from Ulead’s PhotoImpact and a simple text format are
supported). The input and output width of the LUT can also be specified
in the range allowed by the DICOM standard. The interpolation of the
input range is done by a polynomial curve fitting algorithm.
In addition to the DICOM output file the LUT data can also be exported
to a tabbed text file which allows the easy visualization of the curves
with a common spread sheet application (e.g. Microsoft Excel).
PARAMETERS
dcmimg-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
LUT creation options
LUT type:
+Tm --modality
create as Modality LUT
+Tp --presentation
create as Presentation LUT
+Tv --voi
create as VOI LUT (default)
LUT placement:
+Pa --add
add to existing transform (defaul for and only with +Tv)
+Pr --replace
replace existing transform (default for +Tm and +Tp)
LUT content:
+Cg --gamma [g]amma : float
use gamma value (default: 1.0)
+Cm --map-file [f]ilename : string
read input data from MAP file
+Ct --text-file [f]ilename : string
read input data from text file
LUT options:
+Og --inverse-gsdf
apply inverse GSDF (print presentation LUT in OD)
--min-density [v]alue : integer (0..65535, default: 20)
set min density to v (in hundreds of OD)
--max-density [v]alue : integer (0..65535, default: 300)
set max density to v (in hundreds of OD)
+Oi --illumination [v]alue : integer (0..65535, default: 2000)
set illumination to v (in cd/m^2)
+Or --reflection [v]alue : integer (0..65535, default: 10)
set reflected ambient light to v (in cd/m^2)
LUT structure:
-b --bits [n]umber : integer
create LUT with n bit values (8..16, default: 16)
-e --entries [n]umber : integer
create LUT with n entries (1..65536, default: 256)
-f --first-mapped [n]umber : integer
first input value mapped (-31768..65535, default: 0)
-r --random [n]umber : unsigned integer
perform n randomly selected permutations on the LUT
-rs --random-seed [n]umber : unsigned integer
initialise the random-number generator with n
(default: 0, for reproduceable results)
-o --order [n]umber : integer
use polynomial curve fitting algorithm with order n
(0..99, default: 5)
-E --explanation [n]ame : string
LUT explanation (default: automatically created)
-a --byte-align
create byte-aligned LUT (implies -b 8)
LUT data VR:
+Dw --data-ow
write LUT Data as OW (default)
+Du --data-us
write LUT Data as US
+Ds --data-ss
write LUT Data as SS (minimal support)
file options
+Fi --dicom-input [f]ilename : string
read dataset from DICOM file f
+Fo --text-output [f]ilename : string
write LUT data to tabbed text file f
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 dcmmklut 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) 1998-2004 by Kuratorium OFFIS e.V., Escherweg 2, 26121
Oldenburg, Germany.