| CPC G06V 20/44 (2022.01) [G06V 10/60 (2022.01)] | 16 Claims |
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1. A vision sensor comprising:
a memory;
a pixel array comprising a plurality of pixels configured to generate an event signal by detecting an event in which an intensity of incident light changes; and
an event detection circuit configured to read the event signal from the pixel array and configured to process the event signal,
wherein the event detection circuit is configured to:
store, in the memory, a state map comprising:
a first state corresponding to a presence of an event of each of the plurality of pixels, and
a second state corresponding to an absence of the event, and
correct the event occurring in a selected pixel, based on the state map stored in the memory,
wherein the pixel array comprises a target pixel and surrounding pixels adjacent to the target pixel,
wherein the event detection circuit is configured to determine the target pixel to be a hot pixel, based on the number of the first state acquired from the surrounding pixels, which is less than a preset hot pixel reference value,
wherein the event detection circuit is configured to determine the target pixel to be a normal pixel, based on the number of the first state acquired from the surrounding pixels, which is greater than or equal to the preset hot pixel reference value,
wherein the event detection circuit is configured to reset the state map stored in the memory at a predetermined time interval, and
wherein the preset hot pixel reference value is inversely proportional to the predetermined time interval.
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