A Quadratic Model with Nonpolynomial Terms for Remote Colorimetric Calibration of 3D Laser Scanner Data Based on Piecewise Cubic Hermite Polynomials

Table 1

Numerical comparison of the reflectance and lightness values measured by MINOLTA spectrophotometer and RGB-ITR with linear and nonlinear calibration methods for the reflectance gray target.

Instrument	= 440 nm	= 514 nm	= 660 nm
MINOLTA
RGB-ITR mean value
MINOLTA
RGB-ITR mean value