1 October 1992 Human low-vision image warping: channel-matching considerations
Author Affiliations +
We are investigating the possibility that a video image may productively be warped prior to presentation of 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.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Richard D. Juday, Richard D. Juday, Alan T. Smith, Alan T. Smith, David S. Loshin, David S. Loshin, "Human low-vision image warping: channel-matching considerations", Proc. SPIE 1705, Visual Information Processing, (1 October 1992); doi: 10.1117/12.138465; https://doi.org/10.1117/12.138465

Back to Top