Provided by: dcmtk_3.6.7-6_amd64 bug


       dcmdspfn - Export standard display curves to a text file


       dcmdspfn [options]


       Command line program converts a DCMTK monitor / camera / printer / scanner characteristics
       file to tabbed text file describing the characteristic curve (CC),  the  display  function
       and  the  post-standardized curve (PSC) for an 8 bit display. The 256 values of each curve
       can be visualized by a common spread sheet program. Above that the display curve  (without
       CC  and  PSC)  can  also  be  computed  for a specified luminance/OD range (min/max) and a
       certain number of Digital Driving Levels (DDL).


       dcmfile-in  DICOM input filename to be dumped


   general options
         -h   --help
                print this help text and exit

                print version information and exit

                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 (mutually exclusive)
         +Im  --monitor-file  [f]ilename: string
                text file describing the monitor characteristics

         +Ic  --camera-file  [f]ilename: string
                text file describing the camera characteristics

         +Ip  --printer-file  [f]ilename: string
                text file describing the printer characteristics

         +Is  --scanner-file  [f]ilename: string
                text file describing the scanner characteristics

         +Il  --lum-range  [m]in max: float
                minimum and maximum luminance (cd/m^2)

         +Io  --od-range  [m]in max: float
                minimum and maximum optical density (OD),
                automatically converted to luminance

   creation options
         +Ca  --ambient-light  [a]mbient light: float
                ambient light value (cd/m^2, default: file f)

         +Ci  --illumination  [i]llumination: float
                illumination value (cd/m^2, default: file f)

         +Dn  --min-density  [m]inimum optical density: float
                Dmin value (default: off, only with +Ip and +Io)

         +Dx  --max-density  [m]aximum optical density: float
                Dmax value (default: off, only with +Ip and +Io)

         +Cd  --ddl-count  [n]umber of DDLs: integer
                number of Digital Driving Levels
                (default: 256, only with --lum/od-range)

         +Cf  --curve-fitting  [n]umber: integer
                use polynomial curve fitting algorithm with order n
                (0..99, default: file setting or cubic spline)

   output options
         +Og  --gsdf  [f]ilename: string
                write GSDF curve data to file f

         +Oc  --cielab  [f]ilename: string
                write CIELAB curve data to file f


       The output file describing the CC, GSDF or CIELAB and PSC for  an  8  bit  display  system
       (monitor, camera, printer or scanner) is a simple text file. Lines starting with a '#' are
       treated as comments and, therefore, skipped as well as blank lines. An input file can  for
       instance be created by the command line tool dconvlum.

       The  ambient light value possibly defined in the characteristics file is also used for the
       calculation. In this case the value is part of the file comment  header  as  well  as  the
       number  of  DDL  (digital driving level) values, the absolute luminance range (measured in
       candela per square meter) and the range of the JND index (just noticeable  difference)  in
       case  of  GSDF.  Alternatively, the ambient light value can be specified as a command line
       option. When setting the two luminance values instead of reading a monitor  characteristic
       file as input the luminance range is linearly divided by the number of DDLs.

       For  printers  and scanners the illumination can be specified in addition to the reflected
       ambient light (both in the characteristics file and on the command line).  The  header  of
       the  output  file  includes  the  minimum  and maximum Optical Density (OD) instead of the
       luminance range. Please note that the OD values in the input file have to  be  ordered  in
       descending  order (in contrast to the luminance values used for monitors and cameras). The
       DDL value 0 always means black (darkest value) and  the  maximum  DDL  value  means  white
       (brightest value, clear film).

       The  data  folder contains sample characteristics file for monitors, cameras, printers and
       scanners. See DICOM standard part 14 for more details on display calibration and  Barten's
       model (including GSDF).


       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.


       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).


       <datadir>/camera.lut - sample characteristics file of a camera
       <datadir>/monitor.lut - sample characteristics file of a monitor
       <datadir>/printer.lut - sample characteristics file of a printer
       <datadir>/scanner.lut - sample characteristics file of a scanner


       dconvlum(1), dcod2lum(1)


       Copyright (C) 1999-2022 by OFFIS e.V., Escherweg 2, 26121 Oldenburg, Germany.