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Proceedings Paper

Transfer of visual data from the laboratory to the real world
Author(s): Lucia R. Ronchi
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Paper Abstract

After a brief report on the gap existing between the visual functionality assessed in the constrained laboratory conditions and its applications in the complex, multidimensional, real world, two examples concerning color appearance are described in the former experiment we wonder why a colotimetrically uniform, 10° diam. test field has a uniform color appearance, in spite of the eccentricity dependence of the color naming for a 1° diam exploring spot. It is as if the underlying gradient of responsiveness of the underlying array of photoreceptors were discounted. But this does not tell us what is the actual color appearance. Less distal mechanisms resulting in assimilation or filling-in are to be called into play. In the second experiment we consider as test objects the modern, expensive, flashy cars. Although coated uniformly, under natural outdoor lighting they appear as a complex set of segmented 'regions' differing in lightness and even in hue. However, simultaneously and effortlessly, we perceive a coexisting idealized uniform surface color, probably reconstructed as if the perturbation due to natural lighting, responsible for the segregation into regions, and the gloss responsible for intra-region textures were discounted.

Paper Details

Date Published: 6 June 2002
PDF: 4 pages
Proc. SPIE 4421, 9th Congress of the International Colour Association, (6 June 2002); doi: 10.1117/12.464604
Show Author Affiliations
Lucia R. Ronchi, Associazione Ottica Italiana (Italy)

Published in SPIE Proceedings Vol. 4421:
9th Congress of the International Colour Association
Robert Chung; Allan Rodrigues, Editor(s)

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