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Human low vision image warping - Channel matching considerationsWe are investigating the possibility that a video image may productively be warped prior to presentation to a low vision patient. This could form part of a prosthesis for certain field defects. We have done preliminary quantitative studies on some notions that may be valid in calculating the image warpings. We hope the results will help make best use of time to be spent with human subjects, by guiding the selection of parameters and their range to be investigated. We liken a warping optimization to opening the largest number of spatial channels between the pixels of an input imager and resolution cells in the visual system. Some important effects are not quantified that will require human evaluation, such as local 'squashing' of the image, taken as the ratio of eigenvalues of the Jacobian of the transformation. The results indicate that the method shows quantitative promise. These results have identified some geometric transformations to evaluate further with human subjects.
Document ID
Document Type
Conference Paper
Juday, Richard D. (NASA Johnson Space Center Houston, TX, United States)
Smith, Alan T. (Lockheed Engineering & Sciences Co. Houston, TX, United States)
Loshin, David S. (Houston Univ. TX, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: Visual information processing; Proceedings of the Meeting, Orlando, FL, Apr. 20-22, 1992 (A93-32438 12-61)
Subject Category
Distribution Limits

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IDRelationTitle19930048441Analytic PrimaryVisual information processing; Proceedings of the Meeting, Orlando, FL, Apr. 20-22, 1992