公开(公告)号：US11689824B2

公开(公告)日：2023-06-27

申请号：US17906063

申请日：2021-03-10

Applicant: PROPHESEE

Inventor： Lagorce Xavier ,  Daniel Matolin ,  Denis Bourke ,  Thomas Finateu

IPC: H04N25/47 ,  H04N25/707 ,  H04N25/771 ,  H04N25/76

CPC classification number: H04N25/47 ,  H04N25/707 ,  H04N25/771 ,  H04N25/7795

Abstract: Embodiments of the present disclosure include an event-based image sensor and an event filtering method for use with an event-based image sensor. The event-based image sensor comprises a plurality of pixel circuits forming a pixel array, each pixel circuit comprising a photoreceptor circuit configured to generate a photoreceptor signal derived from a photocurrent generated by a light impinging on a light-sensitive element of the photoreceptor circuit, and a detector configured to detect a change in the photoreceptor signal and to generate an event in response to the detected change in the photoreceptor signal. The event-based image sensor further includes a processing chain and an event filter that is configured to receive the generated event and to accept the received event based on a plurality of conditions. The plurality of conditions include a condition that the received event is part of a previously unaccepted event trail, the event trail comprising a plurality of successive events having a same polarity and separated by time intervals each shorter than a time threshold.