CPC G06V 20/597 (2022.01) [G06T 7/246 (2017.01); G06T 11/001 (2013.01); G06V 10/25 (2022.01); G06V 20/52 (2022.01); H04N 7/18 (2013.01); G06T 2207/30268 (2013.01)] | 19 Claims |
1. A method comprising:
accumulating event information from a plurality of events occurring during successive event cycles across a field of view of an event camera, each event indicating an x,y location within said field of view, a polarity for a change of detected light intensity incident at said x,y location and an event cycle at which said event occurred;
responsive to a selected event cycle, analyzing event information for one or more preceding event cycles to identify a region of interest bounding an eye region; and
responsive to a threshold event criterion, generating a textural image for the region of interest from event information accumulated from within the region of interest by:
obtaining a count (pc) of events occurring at each pixel location of an output image in a time window preceding the threshold event criterion; determining a potential absence of a blink within said eye region based at least in part on the count (pc) of events before producing the textural image;
generating a decay factor (ph) for each pixel location as a function of said count; and
producing said textural image based on the decay factor (ph) and the count (pc).
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