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Proceedings Paper

Apparent stereo: the Cornsweet illusion can enhance perceived depth
Author(s): Piotr Didyk; Tobias Ritschel; Elmar Eisemann; Karol Myszkowski; Hans-Peter Seidel
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Paper Abstract

It is both a technical and an artistic challenge to depict three-dimensional content using stereo equipment and a flat two-dimensional screen. On the one hand, the content needs to fit within the limits of a given display technology and at the same time achieve a comfortable viewing experience. Given the technological advances of 3D equipment, especially the latter increases in importance. Modifications to stereo content become necessary that aim at flattening or even removing binocular disparity to adjust the 3D content to match the comfort zone in which the clash between accommodation and vergence stays acceptable. However, applying such modifications can lead to a reduction of crucial depth details. One promising direction is backwardcompatible stereo, for which the disparity is low enough that overlaid stereo pairs seem almost identical. It builds upon the Craik-O'Brien-Cornsweet effect, a visual illusion, which uses so-called Cornsweet profiles to produce a local contrast that leads to a perceived brightness increase. Similarly, Cornsweet profiles in disparity can lead to an illusion of depth. Applying them skilfully at depth discontinuities allows for a reduction of the overall disparity range to ensure a comfortable yet convincing stereo experience. The present work extends the previous idea by showing that Cornsweet profiles can also be used to enhance the 3D impression. This operation can help in regions where the disparity range was compressed, but also to emphasize parts of a scene. A user study measures the performance of backward-compatible stereo and our disparity enhancement.

Paper Details

Date Published: 17 February 2012
PDF: 12 pages
Proc. SPIE 8291, Human Vision and Electronic Imaging XVII, 82910N (17 February 2012); doi: 10.1117/12.907612
Show Author Affiliations
Piotr Didyk, Max-Planck-Institut für Informatik (Germany)
Tobias Ritschel, Max-Planck-Institut für Informatik (Germany)
Telecom ParisTech, CNRS (France)
Intel Visual Computing Institut (Germany)
Elmar Eisemann, Telecom ParisTech, CNRS (France)
Karol Myszkowski, Max-Planck-Institut für Informatik (Germany)
Hans-Peter Seidel, Max-Planck-Institut für Informatik (Germany)

Published in SPIE Proceedings Vol. 8291:
Human Vision and Electronic Imaging XVII
Bernice E. Rogowitz; Thrasyvoulos N. Pappas; Huib de Ridder, Editor(s)

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