1dcmquant(1) OFFIS DCMTK dcmquant(1)
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6 dcmquant - Convert DICOM color images to palette color
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10 dcmquant [options] dcmfile-in dcmfile-out
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13 The dcmquant utility reads a DICOM color image, computes a palette
14 color look-up table of the desired size for this image (based on the
15 median cut algorithm published by Paul Heckbert) and converts the color
16 image into a DICOM palette color image.
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19 dcmfile-in DICOM input filename to be converted
20 dcmfile-out DICOM output filename to be written
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24 general options
25 -h --help
26 print this help text and exit
27 --version
29 print version information and exit
30 --arguments
32 print expanded command line arguments
33 -q --quiet
35 quiet mode, print no warnings and errors
36 -v --verbose
38 verbose mode, print processing details
39 -d --debug
41 debug mode, print debug information
42 -ll --log-level [l]evel: string constant
44 (fatal, error, warn, info, debug, trace)
45 use level l for the logger
46 -lc --log-config [f]ilename: string
48 use config file f for the logger
49 input options
51 input file format:
52 +f --read-file
54 read file format or data set (default)
55 +fo --read-file-only
57 read file format only
58 -f --read-dataset
60 read data set without file meta information
61 input transfer syntax:
63 -t= --read-xfer-auto
65 use TS recognition (default)
66 -td --read-xfer-detect
68 ignore TS specified in the file meta header
69 -te --read-xfer-little
71 read with explicit VR little endian TS
72 -tb --read-xfer-big
74 read with explicit VR big endian TS
75 -ti --read-xfer-implicit
77 read with implicit VR little endian TS
78 image processing and encoding options
80 frame selection:
81 +F --frame [n]umber: integer
83 select specified frame
84 +Fa --all-frames
86 select all frames (default)
87 compatibility:
89 +Mp --accept-palettes
91 accept incorrect palette attribute tags
92 (0028,111x) and (0028,121x)
93 median cut dimension selection:
95 +Dr --mc-dimension-rgb
97 max dimension from RGB range (default)
98 +Dl --mc-dimension-lum
100 max dimension from luminance
101 median cut representative color selection:
103 +Cb --mc-color-avgbox
105 average colors in box (default)
106 +Cp --mc-color-avgpixel
108 average pixels in box
109 +Cc --mc-color-center
111 select center of box
112 color palette value representation:
114 +pw --write-ow
116 write Palette LUT as OW (default)
117 +pu --write-us
119 write Palette LUT as US (retired)
120 color palette creation:
122 +pe --lut-entries-word
124 write Palette LUT with 16-bit entries
125 +pf --floyd-steinberg
127 use Floyd-Steinberg error diffusion
128 +pc --colors number of colors: 2..65536 (default 256)
130 number of colors to quantize to
131 SOP Class UID:
133 +cd --class-default
135 keep SOP Class UID (default)
136 +cs --class-sc
138 convert to Secondary Capture Image
139 (implies --uid-always)
140 SOP Instance UID:
142 +ua --uid-always
144 always assign new UID (default)
145 +un --uid-never
147 never assign new UID
148 output options
150 output file format:
151 +F --write-file
153 write file format (default)
154 -F --write-dataset
156 write data set without file meta information
157 output transfer syntax:
159 +t= --write-xfer-same
161 write with same TS as input (default)
162 +te --write-xfer-little
164 write with explicit VR little endian TS
165 +tb --write-xfer-big
167 write with explicit VR big endian TS
168 +ti --write-xfer-implicit
170 write with implicit VR little endian TS
171 post-1993 value representations:
173 +u --enable-new-vr
175 enable support for new VRs (UN/UT) (default)
176 -u --disable-new-vr
178 disable support for new VRs, convert to OB
179 group length encoding:
181 +g= --group-length-recalc
183 recalculate group lengths if present (default)
184 +g --group-length-create
186 always write with group length elements
187 -g --group-length-remove
189 always write without group length elements
190 length encoding in sequences and items:
192 +e --length-explicit
194 write with explicit lengths (default)
195 -e --length-undefined
197 write with undefined lengths
198 data set trailing padding (not with --write-dataset):
200 -p= --padding-retain
202 do not change padding
203 (default if not --write-dataset)
204 -p --padding-off
206 no padding (implicit if --write-dataset)
207 +p --padding-create [f]ile-pad [i]tem-pad: integer
209 align file on multiple of f bytes and items on
210 multiple of i bytes
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213 The level of logging output of the various command line tools and
214 underlying libraries can be specified by the user. By default, only
215 errors and warnings are written to the standard error stream. Using
216 option --verbose also informational messages like processing details
217 are reported. Option --debug can be used to get more details on the
218 internal activity, e.g. for debugging purposes. Other logging levels
219 can be selected using option --log-level. In --quiet mode only fatal
220 errors are reported. In such very severe error events, the application
221 will usually terminate. For more details on the different logging
222 levels, see documentation of module 'oflog'.
223 In case the logging output should be written to file (optionally with
225 logfile rotation), to syslog (Unix) or the event log (Windows) option
226 --log-config can be used. This configuration file also allows for
227 directing only certain messages to a particular output stream and for
228 filtering certain messages based on the module or application where
229 they are generated. An example configuration file is provided in
230 <etcdir>/logger.cfg.
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233 All command line tools use the following notation for parameters:
234 square brackets enclose optional values (0-1), three trailing dots
235 indicate that multiple values are allowed (1-n), a combination of both
236 means 0 to n values.
237 Command line options are distinguished from parameters by a leading '+'
239 or '-' sign, respectively. Usually, order and position of command line
240 options are arbitrary (i.e. they can appear anywhere). However, if
241 options are mutually exclusive the rightmost appearance is used. This
242 behavior conforms to the standard evaluation rules of common Unix
243 shells.
244 In addition, one or more command files can be specified using an '@'
246 sign as a prefix to the filename (e.g. @command.txt). Such a command
247 argument is replaced by the content of the corresponding text file
248 (multiple whitespaces are treated as a single separator unless they
249 appear between two quotation marks) prior to any further evaluation.
250 Please note that a command file cannot contain another command file.
251 This simple but effective approach allows one to summarize common
252 combinations of options/parameters and avoids longish and confusing
253 command lines (an example is provided in file <datadir>/dumppat.txt).
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256 The dcmquant utility will attempt to load DICOM data dictionaries
257 specified in the DCMDICTPATH environment variable. By default, i.e. if
258 the DCMDICTPATH environment variable is not set, the file
259 <datadir>/dicom.dic will be loaded unless the dictionary is built into
260 the application (default for Windows).
261 The default behavior should be preferred and the DCMDICTPATH
263 environment variable only used when alternative data dictionaries are
264 required. The DCMDICTPATH environment variable has the same format as
265 the Unix shell PATH variable in that a colon (':') separates entries.
266 On Windows systems, a semicolon (';') is used as a separator. The data
267 dictionary code will attempt to load each file specified in the
268 DCMDICTPATH environment variable. It is an error if no data dictionary
269 can be loaded.
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272 Copyright (C) 2001-2017 by OFFIS e.V., Escherweg 2, 26121 Oldenburg,
273 Germany.
274Version 3.6.6 Thu Jan 14 2021 dcmquant(1)