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4.7
Validation module
1. Select a spectral response text (.txt) file with values interpolated to 5 nm (see advanced settings) that
was exported from the spectral sensitivity module.
2. Select a spectral distribution for the light source used for the illumination of the ColorChecker test chart.
Individual light sources may be used here. Intensity values for wavelengths between 380 and 780 nm in
5 nm steps are needed to create an individual light source file. Put this data into a text file with the
wavelength values in the first column and the intensity values in the second column. Columns must be
separated with a tabulator. The files in the /calibration_files/light source directory of the camSPECS
program folder may be used as a template. Format the file corresponding to these files, copy it to this
folder and then restart camSPECS.
Image Engineering
Wavelength (nm)
Intensity
380
24.49
385
27.18
390
29.87
...
...
770
82.92
775
80.6
780
78.27
Page 25 of 36
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