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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 30, Iss. 3 — Mar. 1, 2013
  • pp: 392–402

Performance of visual search tasks from various types of contour information

Liron Itan and Yitzhak Yitzhaky  »View Author Affiliations


JOSA A, Vol. 30, Issue 3, pp. 392-402 (2013)
http://dx.doi.org/10.1364/JOSAA.30.000392


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Abstract

A recently proposed visual aid for patients with a restricted visual field (tunnel vision) combines a see-through head-mounted display and a simultaneous minified contour view of the wide-field image of the environment. Such a widening of the effective visual field is helpful for tasks, such as visual search, mobility, and orientation. The sufficiency of image contours for performing everyday visual tasks is of major importance for this application, as well as for other applications, and for basic understanding of human vision. This research aims is to examine and compare the use of different types of automatically created contours, and contour representations, for practical everyday visual operations using commonly observed images. The visual operations include visual searching for items, such as cutlery, housewares, etc. Considering different recognition levels, identification of an object is distinguished from mere detection (when the object is not necessarily identified). Some nonconventional visual-based contour representations were developed for this purpose. Experiments were performed with normal-vision subjects by superposing contours of the wide field of the scene over a narrow field (see-through) background. From the results, it appears that about 85% success is obtained for searched object identification when the best contour versions are employed. Pilot experiments with video simulations are reported at the end of the paper.

© 2013 Optical Society of America

OCIS Codes
(100.2980) Image processing : Image enhancement
(330.1880) Vision, color, and visual optics : Detection
(330.3790) Vision, color, and visual optics : Low vision
(330.5000) Vision, color, and visual optics : Vision - patterns and recognition

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: October 31, 2012
Revised Manuscript: January 17, 2013
Manuscript Accepted: January 22, 2013
Published: February 18, 2013

Virtual Issues
Vol. 8, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Liron Itan and Yitzhak Yitzhaky, "Performance of visual search tasks from various types of contour information," J. Opt. Soc. Am. A 30, 392-402 (2013)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-30-3-392


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