Appearance (cesia): Construction of scales by means of spinning disks

CAIVANO, JOSE LUIS

COLOR RESEARCH AND APPLICATION

JOHN WILEY & SONS INC

Lugar: New York; Año: 1994 vol. 19 p. 351 - 362

0361-2317

The name cesia has been proposed for that aspect of appearance which deals with the sensations aroused by differences in the spatial distri-bution of light. In a previous paper, a system of cesias was presented. This included a notation system and a solid with three dimensions or variables in which the sensations were organized. The aim of this paper is to report the development of scales of cesia, constructed with the aid of rotatory disks holding percentages of materials producing the stimuli for the five primary sensations of cesia. These primary sensa¬tions are: transparence, specular reflection, translucence, diffuse reflection, and absorption (black). Different geometries of observation were needed to evaluate the scales. Numerically, they were built using a power function between the magnitudes of the sensations and the magni¬tudes of the stimuli. This research dissolves the assumptions that the geometric attributes of appearance cannot be organized in a coordinate system and that synthetic stimuli cannot be produced for these at¬tributes just as they are produced for color by the mixture of three lights.