Quantification of the results in Figures 10 to 13.

The numbers indicate the (relative) root mean squared error (RMSE, average std). First row: Spatio-chromatic similarity between the coupled features in Figures 10 and 11 after Von-Kries color compensation. On average, HOCCA yielded a smaller RMSE than the other methods (two-sample t-test, largest p-value ). Second row: Prediction error for the color-corresponding pairs in Figures 12 and 13. The RMSE of the different methods is computed relative to the error of HOCCA. A positive relative difference indicates that the alternative method has a larger error than HOCCA. On average, the relative difference is positive for all alternative methods, and significantly larger than zero (one-sided t-test, largest p-value was ).