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Proceedings Paper

Faithful presentation of luminance contrast: evaluation of photographic and computational display methods
Author(s): Erich Phillips; Greg Ward; Thomas J. Ayres
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Paper Abstract

Representations necessarily lose some of the visual information available in corresponding real-world scenes. This paper will discuss evaluations of the extent to which luminance contrast and visibility is preserved with three different methods for representing real-world scenes. Method one involves using psychophysical data from contrast charts to select the best print from among a density-varied series of photographic prints. The second and third methods involve extending the dynamic range of the representation by using High Dynamic Range Image (HDRI) techniques. HDRI's can be created by combining multiple overlapping exposures of a scene, or via computer simulation. In method two, algorithms are used to compress the luminance information in the HDRI into the luminance range available in the display, while preserving visible contrast as much as possible. The third method uses a wide-field, high-dynamic-range viewer to present an image with a much wider dynamic range than is available in a photographic print or a CRT display. Each method represents an improvement over simple photographic representation. In conjunction with appropriate instructions on how to interpret the images and the extent to which the images can be regarded as faithful, methods such as these can support practical decisions in visual design and reconstruction.

Paper Details

Date Published: 17 June 2003
PDF: 6 pages
Proc. SPIE 5007, Human Vision and Electronic Imaging VIII, (17 June 2003); doi: 10.1117/12.473898
Show Author Affiliations
Erich Phillips, Exponent, Inc. (United States)
Greg Ward, Anyhere Software (United States)
Thomas J. Ayres, Consultant (United States)


Published in SPIE Proceedings Vol. 5007:
Human Vision and Electronic Imaging VIII
Bernice E. Rogowitz; Thrasyvoulos N. Pappas, Editor(s)

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