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    METHOD FOR AUTOMATICALLY ADAPTING A PATTERN PROJECTION RATE IN AN ACTIVE PERCEPTION SYSTEM
    1.
    发明申请
    METHOD FOR AUTOMATICALLY ADAPTING A PATTERN PROJECTION RATE IN AN ACTIVE PERCEPTION SYSTEM 有权

    公开(公告)号：US20220166944A1

    公开(公告)日：2022-05-26

    申请号：US17534884

    申请日：2021-11-24

    Applicant: Prophesee

    Inventor： Xavier Lagorce ,  Artiom Tchouprina

    IPC: H04N5/353 ,  H04N5/232 ,  H04N5/225

    Abstract: A method is generally provided for adjusting a pattern projection rate in an active perception system, comprising the steps of observing a scene with an event-based sensor array; projecting a current light pattern of a sequence of light patterns on the scene for a given interval of time; retrieving events generated by the event-based sensor array in response to the projection of the current light pattern; monitoring a property of the event retrieval progress; and dynamically controlling the projection of the light pattern based on the property.

    Method of processing a series of events received asynchronously from an array of pixels of an event-based light sensor
    2.
    发明授权
    Method of processing a series of events received asynchronously from an array of pixels of an event-based light sensor 有权

    公开(公告)号：US11871125B2

    公开(公告)日：2024-01-09

    申请号：US17430141

    申请日：2020-02-10

    Applicant: PROPHESEE

    Inventor： Daniele Perrone ,  Xavier Lagorce ,  Vitor Schambach Costa ,  Ludovic Chotard ,  Sylvain Brohan

    IPC: H04N23/80 ,  H04N25/40 ,  H04N25/443

    CPC classification number: H04N23/80 ,  H04N25/40 ,  H04N25/443

    Abstract: The method processes a series of events received asynchronously from an array of pixels of an event-based light sensor. Each event of the series comprises an address of a pixel of the array from which the event is received, and an attribute value depending on incident light sensed by that pixel. The method comprises: storing a data structure in a first memory, the data structure including event data for at least some of the pixels of the array, the event data for a pixel being related to at least one event most recently received from said pixel; during a timeslot, building, in a second memory having a faster access than the first memory, a map for the pixels of the array as the events of the series are received, the map including an information element for each pixel of the array, the information element having one of a plurality of values including a nil value indicating an absence of event during the timeslot; and updating the data structure after the timeslot using the map.

    Method for outputting a signal from an event-based sensor, and event-based sensor using such method
    4.
    发明授权
    Method for outputting a signal from an event-based sensor, and event-based sensor using such method 有权

    公开(公告)号：US11631246B2

    公开(公告)日：2023-04-18

    申请号：US16957874

    申请日：2018-12-26

    Applicant: PROPHESEE

    Inventor： Stephane Laveau ,  Xavier Lagorce

    IPC: G06V20/30 ,  G06V20/13 ,  G06V20/20 ,  G06T7/00

    Abstract: An event-based sensor having a sensing part that produces events asynchronously. The output signal includes information relating to at least some of the produced events. The method comprises: estimating a rate of production of events by the sensing part; while the estimated rate is less than a threshold, transmitting the signal having a variable rate; and when the estimated rate is above the threshold, transmitting the signal including information relating to only some of the produced events, such that a rate of events for which information is included in the signal remains within the threshold.

    Three-dimensional imaging and sensing using a dynamic vision sensor and pattern projection
    7.
    发明授权
    Three-dimensional imaging and sensing using a dynamic vision sensor and pattern projection 有权

    公开(公告)号：US12000692B2

    公开(公告)日：2024-06-04

    申请号：US17310753

    申请日：2020-02-21

    Applicant: PROPHESEE

    Inventor： Guillaume Chican ,  Manuele Brambilla ,  Xavier Lagorce

    IPC: G06T15/00 ,  G01B11/25 ,  G06F18/23 ,  G06T7/521 ,  G06V10/145 ,  G06V10/60 ,  G06V10/762 ,  G06V20/64

    CPC classification number: G01B11/2513 ,  G06F18/23 ,  G06T7/521 ,  G06V10/145 ,  G06V10/60 ,  G06V10/762 ,  G06V20/64 ,  G06T2207/10016

    Abstract: The present disclosure generally relates to systems and methods for three-dimensional image sensing. More specifically, and without limitation, this disclosure relates to systems and methods for detecting three-dimensional images, and using asynchronous image sensors for detecting the same. In one implementation, at least one processor determines a plurality of patterns associated with a plurality of electromagnetic pulses emitted by a projector onto a scene; receives, from an image sensor, one or more first signals based on reflections caused by the plurality of electromagnetic pulses; detects one or more first events corresponding to one or more first pixels of the image sensor based on the received signals; based on the one or more first events, initializes one or more first events more state machines; receives, from the image sensor, one or more second signals corresponding to the reflections; detects one or more second events corresponding to one or more second pixels of the image sensor based on the received signals; determines candidates for connecting the one or more state machines more second events to the one or more first events; and determines three-dimensional points for the one or more first pixels and the one or more second pixels based on the candidates and the one or more state machines.

    Method of processing information from an event-based sensor
    8.
    发明授权
    Method of processing information from an event-based sensor 有权

    公开(公告)号：US11995878B2

    公开(公告)日：2024-05-28

    申请号：US17427033

    申请日：2020-01-29

    Applicant: PROPHESEE

    Inventor： Xavier Lagorce

    IPC: G06V20/40 ,  G06F16/583 ,  G06T7/269 ,  G06T7/50 ,  G06V10/20 ,  G06V10/26 ,  G06V10/762 ,  G06V20/70

    CPC classification number: G06V10/267 ,  G06F16/583 ,  G06T7/269 ,  G06T7/50 ,  G06V10/20 ,  G06V10/762 ,  G06V20/70 ,  G06V20/44

    Abstract: An event-based sensor has an array of pixels facing a scene. The information to be processed includes events originating from the pixels depending on variations of incident light from the scene. A method includes storing a data structure for a set of pixels of the array, the data structure including, for each pixel of the set, event data associated with a most recent event originating from the pixel. Upon receiving a current event from a first pixel of the array, the method includes retrieving any event data included in the data structure for a group of pixels including the first pixel and a plurality of second pixels adjacent to the first pixel in the array. The current event is labelled based on at least one connectivity criterion between the current event and the most recent event originating from a pixel of the group.

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