man dcmquant (Commandes) - Convert DICOM color images to palette color
NAME
dcmquant - Convert DICOM color images to palette color
SYNOPSIS
dcmquant [options] dcmfile-in dcmfile-out
DESCRIPTION
The dcmquant utility reads a DICOM color image, computes a palette color look-up table of the desired size for this image (based on the median cut algorithm published by Paul Heckbert) and converts the color image into a DICOM palette color image.
PARAMETERS
dcmfile-in DICOM input filename to be converted
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
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
frame selection:
+F --frame [n]umber : integer select specified frame
+Fa --all-frames select all frames (default)
compatibility options:
+Mp --accept-palettes accept incorrect palette attribute tags (0028,111x) and (0028,121x)
median cut dimension selection options:
+Dr --mc-dimension-rgb max dimension from RGB range (default)
+Dl --mc-dimension-lum max dimension from luminance
median cut representative color selection options:
+Cb --mc-color-avgbox average colors in box (default)
+Cp --mc-color-avgpixel average pixels in box
+Cc --mc-color-center select center of box
color palette creation options:
+pw --write-ow write Palette LUT as OW instead of US
+pe --lut-entries-word write Palette LUT with 16-bit entries
+pf --floyd-steinberg use Floyd-Steinberg error diffusion
+pc --colors number of colors: 2..65536 (default 256) number of colors to quantize to
SOP Class UID options:
+cd --class-default keep SOP Class UID (default)
+cs --class-sc convert to Secondary Capture Image (implies --uid-always)
SOP Instance UID options:
+ua --uid-always always assign new UID (default)
+un --uid-never never assign new 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 dcmquant 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) 2001-2005 by Kuratorium OFFIS e.V., Escherweg 2, 26121 Oldenburg, Germany.