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    Non-linear quantization at pixel sensor
    33.
    发明授权
    Non-linear quantization at pixel sensor 有权

    公开(公告)号：US11943561B2

    公开(公告)日：2024-03-26

    申请号：US16896130

    申请日：2020-06-08

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Tsung-Hsun Tsai ,  Xinqiao Liu

    IPC: H04N25/533 ,  H04N25/71 ,  H04N25/75

    CPC classification number: H04N25/533 ,  H04N25/745 ,  H04N25/75

    Abstract: In one example, an apparatus comprises: a photodiode to generate a charge in response to light within an exposure period having a first duration; a charge sensing unit to accumulate at least a part of the charge within the exposure period; a quantizer; and a controller to: determine, using the quantizer and within a measurement period having a second duration, whether a first quantity of the at least a part of the charge accumulated at the charge sensing unit exceeds a threshold, and a time it takes for the first quantity to exceed the threshold, wherein the first duration and the second duration are individually programmable; and based on whether the first quantity exceeds the threshold, output a first value representing the time or a second value representing a second quantity of the charge generated by the photodiode within the exposure period to represent an intensity of the light.

    Pixel sensor having hierarchical memory
    35.
    发明授权
    Pixel sensor having hierarchical memory 有权

    公开(公告)号：US11902685B1

    公开(公告)日：2024-02-13

    申请号：US17242152

    申请日：2021-04-27

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Tsung-Hsun Tsai ,  Song Chen ,  Xinqiao Liu

    IPC: H04N5/335 ,  H04N25/63 ,  H04N25/772 ,  H04N25/75

    CPC classification number: H04N25/772 ,  H04N25/63 ,  H04N25/75

    Abstract: In one example, an apparatus comprises an array of pixel cells, each pixel cell including: a photodiode to generate a charge in response to incident light, a charge sensing unit configured to generate a voltage based on the charge, a quantizer configured to generate a digital output based on quantizing the voltage, and an in-pixel memory configured to store the digital output. The apparatus further includes a bus interface, an off-array frame memory, and a frame memory controller configured to: control the frame memory to receive, via the set of parallel interconnects, the digital outputs from the in-pixel memory of each pixel cell of the array of pixel cells; store the digital outputs in the frame memory; fetch the digital outputs from the frame memory; and transmit the digital outputs to a host device via the bus interface.

    Pixel sensor having multiple photodiodes
    36.
    发明授权
    Pixel sensor having multiple photodiodes 有权

    公开(公告)号：US11863886B2

    公开(公告)日：2024-01-02

    申请号：US17591300

    申请日：2022-02-02

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Andrew Samuel Berkovich ,  Xinqiao Liu ,  Song Chen ,  Nicholas Daniel Trail ,  Michael Patrick Schaub

    IPC: H04N25/58 ,  H03M1/18 ,  H04N25/59

    CPC classification number: H04N25/58 ,  H03M1/18 ,  H04N25/59

    Abstract: In one example, an apparatus comprises: multiple distinct sets of photodiodes, wherein each set of photodiodes includes one or more photodiodes, one or more charge sensing units, and a controller. The controller is configured to: transfer charge generated by the one or more photodiodes in response to a different component of incident light to the one or more charge sensing units in order to convert the charge to voltages; perform one or more quantization processes of a plurality of quantization processes corresponding to a plurality of intensity ranges, wherein the one or more quantization processes quantizes the voltages from the one or more charge sensing units to digital values representing components of a pixel of different wavelength ranges; and generate a pixel value based on the at least some of the digital values.

    Systems and methods for hand pose estimation from video
    37.
    发明授权
    Systems and methods for hand pose estimation from video 有权

    公开(公告)号：US11823498B1

    公开(公告)日：2023-11-21

    申请号：US17384209

    申请日：2021-07-23

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Chengde Wan ,  Randi Cabezas ,  Xinqiao Liu ,  Ziyun Li

    IPC: G06V40/20 ,  G06F3/01 ,  G06T7/70

    CPC classification number: G06V40/28 ,  G06F3/017 ,  G06T7/70

    Abstract: The disclosed computer-implemented method may include (1) receiving a present frame of a video stream, the present frame comprising a present depiction of a multi-segment articulated body system, (2) identifying a previous frame of the video stream that comprises a previous depiction of the multi-segment articulated body system, (3) analyzing the present frame and the previous frame to determine whether the multi-segment articulated body system remained substantially rigid between the previous frame and the present frame, and (4) estimating a pose of the multi-segment articulated body system in the present frame using a first pose estimation computation that treats the multi-segment articulated body system as rigid and that is selected in contrast to a second pose estimation computation based on determining that the multi-segment articulated body system remained substantially rigid between the previous frame and the present frame. Various other methods, systems, and computer-readable media are also disclosed.

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