Page 153 - Computational Colour Science Using MATLAB

140 CHARACTERIZATION OF CAMERAS
derived. The performance on the training set is then the median colour difference
using the reduced training on which the system was trained and the performance
of the test set was as before. Both systems show a surprising degree of robustness
with test performance, only degrading substantially for training set sizes less than
50. Note that for the polynomial system in particular, that the training error
reduces for small training set sizes. If a proper independent test set was not used
to evaluate the performance of the modes, then the use of a small set of training
samples could lead to an optimistic view of the performance of the
characterization models.