dcmdspfn(1)							    OFFIS DCMTK 						       dcmdspfn(1)

NAME

       dcmdspfn - Export standard display curves to a text file

SYNOPSIS

       dcmdspfn [options]

DESCRIPTION

       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 Device Driving Levels (DDL).

PARAMETERS

       dcmfile-in  DICOM input filename to be dumped

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
	 +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 Device 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

NOTES

       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 (device driving level) values, the absolute luminance range (measured in candela per
       square meter) and the range of the JND index (just noticable 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).

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 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  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 to summarize common combinations of options/parameters and avoids longish and	confusing  command
       lines (an example is provided in file <datadir>/dumppat.txt).

FILES

       <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

SEE ALSO

       dconvlum(1), dcod2lum(1)

COPYRIGHT

       Copyright (C) 1999-2010 by OFFIS e.V., Escherweg 2, 26121 Oldenburg, Germany.

Version 3.6.0							    6 Jan 2011							       dcmdspfn(1)