Analysis of Three Euclidean Color-Difference Formulas for Predicting the Average RIT-DuPont Color-Difference Ellipsoids
نویسندگان
چکیده
The RIT-DuPont data set is used to investigate the Euclidean color-difference formulas DIN99d, DIN99o and IPT. The coordinates of the metrics as well as the metrics themselves are transformed to the CIELAB color space, the latter by means of the Jacobians of the coordinate transformations. The RIT-DuPont ellipsoids in the CIELAB space are compared to the Euclidean metrics using two different methods. First, the predicted ellipsoid cross sections in the principal planes of the CIELAB space are compared to the observed data using the ratio of the union to the cross section of the ellipses, giving a single match ratio. Secondly, the full ellipsoids are compared by the method proposed by Schultze. Neither of the methods show a significant difference in the behaviour of the three different color-difference formulas.
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