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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 3, Iss. 1 — Jan. 29, 2008

Measuring perceived video quality of MPEG enhancement by people with impaired vision

Matthew Fullerton, Russell L. Woods, Fuensanta A. Vera-Diaz, and Eli Peli  »View Author Affiliations


JOSA A, Vol. 24, Issue 12, pp. B174-B187 (2007)
http://dx.doi.org/10.1364/JOSAA.24.00B174


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Abstract

We used a new method to measure the perceived quality of contrast-enhanced motion video. Patients with impaired vision ( n = 24 ) and normally sighted subjects ( n = 6 ) adjusted the level of MPEG-based enhancement of 8 videos ( 4 ‚ÄČ min each) drawn from 4 categories. They selected the level of enhancement that provided the preferred view of the videos, using a decreasing-step-size staircase procedure. Most patients made consistent selections of the preferred level of enhancement, indicating an appreciation of and a perceived benefit from the MPEG-based enhancement. The selections varied between patients and were correlated with letter contrast sensitivity, but the selections were not affected by training, experience, or video category. We measured just noticeable differences directly for videos and mapped the image manipulation (enhancement in our case) onto an approximately linear perceptual space. These tools and approaches will be of value in other evaluations of the image quality of motion video manipulations.

© 2007 Optical Society of America

OCIS Codes
(100.2000) Image processing : Digital image processing
(100.2980) Image processing : Image enhancement
(110.3000) Imaging systems : Image quality assessment
(330.1800) Vision, color, and visual optics : Vision - contrast sensitivity
(330.3790) Vision, color, and visual optics : Low vision

History
Original Manuscript: April 19, 2007
Revised Manuscript: August 16, 2007
Manuscript Accepted: September 28, 2007
Published: November 8, 2007

Virtual Issues
Vol. 3, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Matthew Fullerton, Russell L. Woods, Fuensanta A. Vera-Diaz, and Eli Peli, "Measuring perceived video quality of MPEG enhancement by people with impaired vision," J. Opt. Soc. Am. A 24, B174-B187 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-24-12-B174

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