Journal article
Improved visual performance in letter perception through edge orientation encoding in a retinal prosthesis simulation
FI Kiral-Kornek, E Osullivan-Greene, CO Savage, C McCarthy, DB Grayden, AN Burkitt
Journal of Neural Engineering | IOP PUBLISHING LTD | Published : 2014
Abstract
Main results. Mean letter recognition accuracy was significantly better with the new proposed stimulation strategy (65%) compared to direct grayscale encoding (47%). All examined parameters - stimulus size, phosphene dropout, and location shift - were found to influence the performance, with significant two-way interactions between phosphene dropout and stimulus size as well as between phosphene dropout and phosphene location shift. The analysis delivers a model of perception performance.Objective. Stimulation strategies for retinal prostheses predominately seek to directly encode image brightness values rather than edge orientations. Recent work suggests that the generation of oriented elli..
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Funding Acknowledgements
This research was supported by the Australian Research Council (ARC) through its Special Research Initiative (SRI) in Bionic Vision Australia (BVA). The Bionics Institute acknowledges the support it receives from the Victorian Government through its Operational Infrastructure Support Program. This work was supported by the Australian Federal and Victorian State Governments and the Australian Research Council through the ICT Centre of Excellence program, National ICT Australia (NICTA). Statistical support was provided by the Statistical Consulting Centre of the University of Melbourne. We thank all participants for volunteering their time.