| Abstract
The human visual system assigns constant
chromatic attributes to objects in spite of the alterations in spectral
distribution of the illuminant or the spatio-chromatic arrangement of the
visual field. This visual capacity is called colour constancy. Artificial
vision systems do not usually have this ability, so they give rise to significant
chromatic errors when operating outdoors.
According to the retinex theory, in this
work we have implemented an algorithm for colour constancy. We propose
some new colour descriptors for a stimulus, practically invariant to the
spectral change of the illuminant. Finally, we check experimentally the
statistical stability of these descriptors corresponding to standard colour
samples against a range of standard illuminants as well as their validity
rank.
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