Fuzzy scales for the measurement of color
Résumé
The color, with the particularity to be defined simultaneously as a physical quantity and as a psychophysical quantity, is one of the concepts that can link hard sciences and behavioural sciences. From the viewpoint of behavioural sciences, colors are basically measured with nominal scales. in hard sciences, colors are measured with interval scales. Our hypothesis is that the main relation that must be preserved during a color measurement is a metric. We suggest then that colors must be measured with metrical scales. The fuzzy metrical scale is preferred due to the possibility to define it like a nominal scale.