dconvlum - Convert VeriLUM files to DCMTK display files
dconvlum in-file out-file [ambient]
Command line program that converts VeriLUM file with characteristic curve data (
) to a format used for the Barten transformation in this
toolkit. VeriLUM is a calibration package from ImageSmiths consisting of a
photometer (with serial RS232 connector) and a Windows NT software.
in-file VeriLUM characteristic curve file to be converted
out-file DCMTK display file to be written
ambient ambient light (cd/m^2, floating point value)
The output file describing the characteristic curve of a display system
(monitor) is a simple text file. Lines starting with a '#' are treated as
comments and therefore skipped as well as blank lines. This conversion program
creates such a file automatically (including some comment lines) by
transforming the information stored in the VeriLUM file. The number following
the magic word 'max' defines the maximum DDL value (e.g. 255 for 8 bit
displays). This definition is required before the luminance data can be
defined. Optionally the ambient light value can be specified in this file too.
The floating point value (in candela per square meter) must follow the word
'amb'. Finally the luminance values are defined for each corresponding DDL
(digital driving level) value. The entries do not necessarily have to be
ordered or complete, i.e. there can be less than 'max' + 1 entries. Missing
values are calculated by cubic spline interpolation.
See DICOM standard part 14 for more details on display calibration and Barten's
model (including GSDF).
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