1 research outputs found
Calculation of number of distinguishable colours by real normal observers
The colour-matching functions of standard observers
proposed by the CIE represent the normal colour vision for the
worldwide population. But there are deviations in the colourmatching
functions for real observers with a normal colour
vision, so the observer metamerism index was defined by CIE to
evaluate the mismatch between them in colour appearance. In
this work, we present an alternative form to evaluate the
differences between the CIE standard observer and real
observers (Stiles-Burch database) according to the number of
distinguishable colours in the colour solid associated to each
observer. Unlike the metamerism index defined by CIE, we
evaluate globally the colour appearance for a real observer
taking into account its colour gamut volume. After analyzing the
results, we have seen that the gamut volume of the realobservers
is lower than to that associated to the CIE standard
observer, even to that associated to the CIE modified observer.
Therefore, this work and its methodology could be used to know
the ability of the CMF’s of different observers to get the
maximum colour gamut under the same illuminant.
Furthermore, this methodology could be applicable to study the
gamut volume variability of the real observers regarding to age,
race, etc, or even with abnormalities in colour vision
(dichromacy, pathologies, etc).This research was supported by the Spanish Ministry de Education and Science (Spain) under grant DPI2005-08999-C02-02