Table 5: The comparison of (Image), C between captured images and reference value measured by SP60 before and after calibration.

Obtained by mapping (LED)
Blue printed matterMiddle region of ceramic tile

Chromaticity coordinate measured by SP60
Precalibration (Image)17.6330.93
Postcalibration (Image)4.925.82
Precalibration 0.02360.0166
Postcalibration 0.00920.0115
Improved ratio61.02%30.72%