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    SYSTEMS AND METHODS FOR PHASE UNWRAPPING
    1.
    发明申请
    SYSTEMS AND METHODS FOR PHASE UNWRAPPING 有权

    公开(公告)号：US20230024597A1

    公开(公告)日：2023-01-26

    申请号：US17945900

    申请日：2022-09-15

    Applicant: Analog Devices, Inc.

    Inventor： Charles MATHY

    IPC: G01S17/894 ,  G01S7/4915 ,  G01S17/36

    Abstract: Systems and methods are disclosed for phase unwrapping for time-of-flight imaging. A method is provided for phase unwrapping that includes measuring a plurality of wrapped depths at a respective plurality of frequencies, wherein each of the plurality of wrapped depths corresponds to a respective phase, generating a plurality of unwrapped phases based on a probability distribution function, by unwrapping each of the plurality of wrapped depths, and identifying a Voronoi cell.

    BUILT-IN CALIBRATION OF TIME-OF-FLIGHT DEPTH IMAGING SYSTEMS
    4.
    发明申请
    BUILT-IN CALIBRATION OF TIME-OF-FLIGHT DEPTH IMAGING SYSTEMS 有权

    公开(公告)号：US20230055829A1

    公开(公告)日：2023-02-23

    申请号：US17892405

    申请日：2022-08-22

    Applicant: Analog Devices, Inc.

    Inventor： Charles MATHY ,  Brian C. DONNELLY ,  Nicolas LE DORTZ ,  Sefa DEMIRTAS

    IPC: G06T7/80 ,  G01S7/497 ,  G01S17/89

    Abstract: An image processing system having on-the-fly calibration uses the placement of the imaging sensor and the light source for calibration. The placement of the imaging sensor and light source with respect to each other affect the amount of signal received by a pixel as a function of distance to a selected object. For example, an obstruction can block the light emitter, and as the obstruction is positioned an increasing distance away from the light emitter, the signal level increases as light rays leave the light emitters, bounce off the obstruction and are received by the imaging sensor. The system includes a light source configured to emit light, and an image sensor to collect incoming signals including reflected light, and a processor to determine a distance measurement at each of the pixels and calibrate the system.

    MEASURING AND REMOVING THE CORRUPTION OF TIME-OF-FLIGHT DEPTH IMAGES DUE TO INTERNAL SCATTERING
    5.
    发明申请
    MEASURING AND REMOVING THE CORRUPTION OF TIME-OF-FLIGHT DEPTH IMAGES DUE TO INTERNAL SCATTERING 审中-公开

    公开(公告)号：US20190391238A1

    公开(公告)日：2019-12-26

    申请号：US16387385

    申请日：2019-04-17

    Applicant: Analog Devices, Inc.

    Inventor： Erik D. BARNES ,  Charles MATHY ,  Sefa DEMIRTAS

    IPC: G01S7/48 ,  H04N5/225 ,  H04N5/243 ,  G01S17/89 ,  G01S17/10

    Abstract: Depth imagers can implement time-of-flight operations to measure depth or distance of objects. A depth imager can emit light onto a scene and sense light reflected back from the objects in the scene using an array of sensors. Timing of the reflected light hitting the array of sensors gives information about the depth or distance of objects in the scene. In some cases, corrupting light that is outside of a field of view of a pixel in the array of sensors can hit the pixel due to internal scattering or internal reflections occurring in the depth imager. The corrupting light can corrupt the depth or distance measurement. To address this problem, an improved depth imager can isolate and measure the corrupting light due to internal scattering or internal reflections occurring in the depth imager, and systematically remove the measured corrupting light from the depth or distance measurement.

    MINIATURIZED PHASE CALIBRATION APPARATUS FOR TIME-OF-FLIGHT DEPTH CAMERA
    7.
    发明公开
    MINIATURIZED PHASE CALIBRATION APPARATUS FOR TIME-OF-FLIGHT DEPTH CAMERA 审中-公开

    公开(公告)号：US20230316554A1

    公开(公告)日：2023-10-05

    申请号：US18188329

    申请日：2023-03-22

    Applicant: Analog Devices, Inc.

    Inventor： Tzu-Yu WU ,  Charles MATHY

    IPC: G06T7/586

    CPC classification number: G06T7/586

    Abstract: Systems and apparatus for phase calibration in time-of-flight cameras. In particular, systems and methods are presented for a miniaturized cover design that at least partially encloses the time-of-flight (ToF) module. The geometry of the miniaturized design causes the signals reflected from the calibration device back to the ToF imager to have essentially the same time-of-flight. The design of the calibration device prevents the modulated emissions from leaking out to the environment.

    RESOLVING MULTI-PATH CORRUPTION OF TIME-OF-FLIGHT DEPTH IMAGES
    9.
    发明申请
    RESOLVING MULTI-PATH CORRUPTION OF TIME-OF-FLIGHT DEPTH IMAGES 审中-公开

    公开(公告)号：US20200249348A1

    公开(公告)日：2020-08-06

    申请号：US16706041

    申请日：2019-12-06

    Applicant: Analog Devices, Inc.

    Inventor： Charles MATHY

    IPC: G01S17/08 ,  G06T7/50 ,  H04N13/207

    Abstract: Time of Flight (ToF) depth image processing methods are disclosed for resolving corruption of ToF depth images. In ToF depth imaging, the light can travel paths of different lengths before returning to the pixel. Thus, the light hitting the pixel can have travelled different distances, and the distance obtained from an estimation procedure assuming a single distance may be spurious. Systems and methods are disclosed for including a time-of-flight imager and processor which resolves the multiple paths, and outputs the multiple depths at each pixel.

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