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Proceedings Paper

Naturalness and image quality: chroma and hue variation in color images of natural scenes
Author(s): Huib de Ridder; Frans J. J. Blommaert; Elena A. Fedorovskaya
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Paper Abstract

The relation between perceptual image quality and naturalness was investigated by varying the colorfulness and hue of color images of natural scenes. These variations were created by digitizing the images, subsequently determining their color point distributions in the CIELUV color space and finally multiplying either the chroma value of the hue angle of each pixel by a constant. During the chroma/hue-angle transformation the lightness and hue-angle/chroma value of each pixel were kept constant. Ten subjects rated quality and naturalness on numerical scales. The results show that both quality and naturalness deteriorate as soon as hues start to deviate from the ones in the original image. Chroma variation affected the impression of quality and naturalness to a lesser extent than did hue variation. In general, a linear relation was found between image quality and naturalness. For chroma variation, however, a small but systematic deviation could be observed. This deviation reflects the subjects' preference for more colorful but, at the same time, somewhat unnatural images.

Paper Details

Date Published: 20 April 1995
PDF: 11 pages
Proc. SPIE 2411, Human Vision, Visual Processing, and Digital Display VI, (20 April 1995); doi: 10.1117/12.207555
Show Author Affiliations
Huib de Ridder, Institute for Perception Research (Netherlands)
Frans J. J. Blommaert, Institute for Perception Research (Netherlands)
Elena A. Fedorovskaya, Moscow State Univ. (United States)

Published in SPIE Proceedings Vol. 2411:
Human Vision, Visual Processing, and Digital Display VI
Bernice E. Rogowitz; Jan P. Allebach, Editor(s)

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