Small samples were taken from each panel of the plate with
approximately 100 000 (distance: 1 m), 2000 (distance: 5 m)
and 1000 (distance: 10 m) points where mean intensity value
and surface normal were calculated. We also tested the potential
usability of the laboratory measurement as a correction data of
the incident angle effect on real world surfaces. We scanned a
white wall at distances of 1, 2, 3 and 4 meters. Spectralon
reference was used to calibrate the intensity values between
individual scans and the distance effect was minimized with
correction values from previous laboratory tests.