Abstract
MacAdam plotted the results on the chromaticity diagram in terms of the standard deviation of color matching in several directions about selected colors. The resulting figures formed closed curves on the diagram. The problem corresponds to a model fitting problem. After the MacAdam ellipsoid, model fitting criterions based on information theory such as the MDL has been formulated. This paper investigated the experimental results of the MacAdam Ellipsoid by using the MDL criterion.