Wideband enhancement of television images for people with visual impairments

Eli Peli, Jeonghoon Kim, Yitzhak Yitzhaky, Robert B. Goldstein, Russell L. Woods

Research output: Contribution to journalArticlepeer-review

55 Scopus citations


Wideband enhancement was implemented by detecting visually relevant edge and bar features in an image to produce a bipolar contour map. The addition of these contours to the original image resulted in increased local contrast of these features and an increase in the spatial bandwidth of the image. Testing with static television images revealed that visually impaired patients (n = 35) could distinguish the enhanced images and preferred them over the original images (and degraded images). Most patients preferred a moderate level of wideband enhancement, since they preferred natural-looking images and rejected visible artifacts of the enhancement. Comparison of the enhanced images with the originals revealed that the improvement in the perceived image quality was significant for only 22% of the patients. Possible reasons for the limited increase in perceived image quality are discussed, and improvements are suggested.

Original languageEnglish
Pages (from-to)937-950
Number of pages14
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Issue number6
StatePublished - 1 Jan 2004

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Computer Vision and Pattern Recognition


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