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Image Processing Strategies Dedicated to Visual Cortical Stimulators: A Survey
Author(s) -
Buffoni LouisXavier,
Coulombe Jonathan,
Sawan Mohamad
Publication year - 2005
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.2005.29104.x
Subject(s) - phosphene , computer science , visual prosthesis , computer vision , image processing , brightness , artificial intelligence , grayscale , reliability (semiconductor) , digital image processing , human–computer interaction , image (mathematics) , stimulation , neuroscience , psychology , power (physics) , physics , quantum mechanics , transcranial magnetic stimulation , optics
Multi‐electrode devices are constantly evolving toward a state where complexity and reliability are adequate for providing a breakthrough in visual cortical stimulation allowing the blind to recover partial vision. Yet few research teams have focused on the development of the front‐end subsystem that transforms an input image from a camera into stimulation commands. This article collects state‐of‐the‐art knowledge about the appearance and organization of phosphenes, and previous work in image processing dedicated to visual cortical stimulation. Observations and hypothesis about important issues are highlighted, and six image processing strategies that could be used in such a subsystem are presented, from the most optimistic that use brightness modulation to emulate grayscale to the most conservative that use only on/off phosphene evocation.