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    Resolving multi-path corruption of time-of-flight depth images
    1.
    发明授权
    Resolving multi-path corruption of time-of-flight depth images 有权

    公开(公告)号：US11965962B2

    公开(公告)日：2024-04-23

    申请号：US16706041

    申请日：2019-12-06

    Applicant: Analog Devices, Inc.

    Inventor： Charles Mathy

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

    CPC classification number: G01S17/08 ,  G06T7/50 ,  H04N13/207 ,  G06T2207/10028

    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.

    Built-in calibration of time-of-flight depth imaging systems
    3.
    发明授权
    Built-in calibration of time-of-flight depth imaging systems 有权

    公开(公告)号：US11423572B2

    公开(公告)日：2022-08-23

    申请号：US16664453

    申请日：2019-10-25

    Applicant: Analog Devices, Inc.

    Inventor： Charles Mathy ,  Brian C. Donnelly ,  Nicolas Le Dortz ,  Sefa Demirtas

    IPC: G06K9/00 ,  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
    4.
    发明授权
    Measuring and removing the corruption of time-of-flight depth images due to internal scattering 有权

    公开(公告)号：US11092678B2

    公开(公告)日：2021-08-17

    申请号：US16387385

    申请日：2019-04-17

    Applicant: Analog Devices, Inc.

    Inventor： Erik D. Barnes ,  Charles Mathy ,  Sefa Demirtas

    IPC: G01S7/487 ,  G01S7/48 ,  G01S17/10 ,  H04N5/225 ,  H04N5/243 ,  G01S17/894

    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.

    Built-in calibration of time-of-flight depth imaging systems
    5.
    发明授权
    Built-in calibration of time-of-flight depth imaging systems 有权

    公开(公告)号：US11961257B2

    公开(公告)日：2024-04-16

    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

    CPC classification number: G06T7/80 ,  G01S7/497 ,  G01S17/89 ,  G06T2207/10028

    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.

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