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    METHOD FOR OUTPUTTING A SIGNAL FROM AN EVENT-BASED SENSOR, AND EVENT-BASED SENSOR USING SUCH METHOD
    81.
    发明申请
    METHOD FOR OUTPUTTING A SIGNAL FROM AN EVENT-BASED SENSOR, AND EVENT-BASED SENSOR USING SUCH METHOD 审中-公开

    公开(公告)号：US20200372254A1

    公开(公告)日：2020-11-26

    申请号：US16957874

    申请日：2018-12-26

    Applicant: PROPHESEE

    Inventor： Stephane Laveau ,  Xavier Lagorce

    IPC: G06K9/00 ,  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.

    Dynamic, single photodiode pixel circuit and operating method thereof
    83.
    发明授权
    Dynamic, single photodiode pixel circuit and operating method thereof 有权

    公开(公告)号：US10567682B2

    公开(公告)日：2020-02-18

    申请号：US15827422

    申请日：2017-11-30

    Applicant: Prophesee

    Inventor： Daniel Matolin ,  Christoph Posch

    IPC: H04N5/355 ,  H04N5/3745 ,  H04N3/14 ,  H04N5/335 ,  H04N5/235 ,  H04N5/378 ,  H04N5/341 ,  H04N5/374 ,  H01L27/146

    Abstract: The invention relates to pixel circuit and an operating method thereof, comprising a front-end circuit comprising a single photodiode and having an output, said front-end circuit being configured for delivering on said output a photoreceptor signal derived from a light exposure of said single photodiode; a transient detector circuit configured for detecting a change in said photoreceptor signal delivered on said output; an exposure measurement circuit configured for measuring said photoreceptor signal delivered on said output upon detection by the transient detector circuit of a change in the photoreceptor signal. The invention also relates to an image sensor comprising a plurality of pixel circuits.

    SYSTEM FOR MEASURING ATTRIBUTES OF PARTICLES IN MOTION USING AN EVENT-BASED CAMERA
    85.
    发明公开
    SYSTEM FOR MEASURING ATTRIBUTES OF PARTICLES IN MOTION USING AN EVENT-BASED CAMERA 审中-公开

    公开(公告)号：EP4060317A1

    公开(公告)日：2022-09-21

    申请号：EP21162651.0

    申请日：2021-03-15

    Applicant: Prophesee

    Inventor： VEJARANO, Camilo ,  ROUCH, Thomas

    IPC: G01N15/14 ,  G01N15/10

    Abstract: A method for measuring attributes of a particle in motion comprises observing a region of interest with an event-based sensor oriented such that lines of a pixel array of the sensor lie across an expected trajectory of the particle (P) through the region of interest; defining two reference lines of pixels (R1, R2) separated by a spatial distance (D); sampling a first group of events produced by a first of the two reference lines; sampling a second group of events produced by the second of the two reference lines; determining a temporal distance (T) between the second and first groups of events; and providing a longitudinal speed factor (vy) of the particle based on the spatial distance and the temporal distance.

    METHOD OF PROCESSING A SERIES OF EVENTS RECEIVED ASYNCHRONOUSLY FROM AN ARRAY OF PIXELS OF AN EVENT-BASED LIGHT SENSOR
    88.
    发明公开
    METHOD OF PROCESSING A SERIES OF EVENTS RECEIVED ASYNCHRONOUSLY FROM AN ARRAY OF PIXELS OF AN EVENT-BASED LIGHT SENSOR 审中-公开

    公开(公告)号：EP3694202A1

    公开(公告)日：2020-08-12

    申请号：EP19156323.8

    申请日：2019-02-11

    Applicant: Prophesee

    Inventor： PERRONE, Daniele ,  LAGORCE, Xavier ,  SCHAMBACH COSTA, Vitor ,  CHOTARD, Ludovic ,  BROHAN, Sylvain

    IPC: H04N5/232 ,  H04N5/341 ,  H04N5/378 ,  H04N5/76

    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.

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