Colorimetric calibration in electronic imaging devices using a look-up-table model and interpolations

A practical colorimetric callbration method using tetrahedralinterpolation techniques was proposed for electronic imaging devices not having accurate analytical models. By dividing color gamutinto many tetrahedrons and using ilnearmatrices, 3-D forward and backward transformations were performed without iterative calculation. To reduce the measurement points, a nonlinear interpolation technique was also proposed. These interpolation errors were simulated on hypotheticaldevices obeying known analytical models to avoid measurement error and the device stability problem. According to the simulations, a 33 x 33 x 33 look up table was enough to model the analytical models with color difference E*uv 0.5 at worst, and 5 x 5 x 5 colors were enough to predict the color of the output devices in practice.