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    System and methods for bit rate control
    1.
    发明授权
    System and methods for bit rate control 有权

    公开(公告)号：US10887365B2

    公开(公告)日：2021-01-05

    申请号：US16262048

    申请日：2019-01-30

    Applicant: SZ DJI TECHNOLOGY CO., LTD.

    Inventor： Wenjun Zhao ,  Yannan Wu

    IPC: H04L29/06 ,  H04N19/15 ,  H04N19/174 ,  H04N19/126

    Abstract: A computer-implemented method for controlling bit rate includes determining a difference between a cumulative number of bits used to encode one or more slices of a frame up to and including a first slice encoded using a first coding parameter and a maximum number of bits allowed to encode the one or more slices of the frame, updating a coding parameter threshold based at least in part on a counter that indicates a number of times when one or more coding parameters used to encode the one or more slices reach or exceed the coding parameter threshold, and determining a second coding parameter used to encode a second slice of the frame based at least in part on the difference and the updated coding parameter threshold.

    System and method for constructing optical flow fields
    3.
    发明授权
    System and method for constructing optical flow fields 有权

    公开(公告)号：US10321153B2

    公开(公告)日：2019-06-11

    申请号：US15458522

    申请日：2017-03-14

    Applicant: SZ DJI TECHNOLOGY CO., LTD.

    Inventor： Yannan Wu

    IPC: H04N19/527 ,  H04N19/513 ,  H04N19/172 ,  H04N19/182

    Abstract: A system constructs an optical flow field that corresponds with a selected video frame. The optical flow field is constructed based on a first motion of a mobile platform having an imaging device and a status of the imaging device. The first motion and the status are determined with measurements of sensors installed on the mobile platform and/or the imaging device installed on the mobile platform. The first motion includes at least one of a first rotation, a horizontal movement, or a vertical movement of the mobile platform. The status includes a rotation of the imaging device and/or an orientation of the imaging device relative to the mobile platform.

    Systems and methods for video processing and display
    4.
    发明授权
    Systems and methods for video processing and display 有权

    公开(公告)号：US11019280B2

    公开(公告)日：2021-05-25

    申请号：US16180571

    申请日：2018-11-05

    Applicant: SZ DJI TECHNOLOGY CO., LTD.

    Inventor： Cong Zhao ,  Yannan Wu ,  Kang Yang ,  Guyue Zhou

    IPC: H04N5/262 ,  H04N13/161 ,  H04N19/597 ,  H04N13/194 ,  G01C21/00 ,  G01P13/00 ,  H04N7/18 ,  H04N5/28

    Abstract: A method for processing video data of an environment includes, with aid of one or more processors individually or collectively, obtaining in or near real-time a reference position of an imaging device located on a movable object based on one or more previously traversed positions of the imaging device, and modifying an image frame in the video data to obtain a modified image frame based on the reference position of the imaging device and an actual position of the imaging device at which the image frame is taken. The one or more previously traversed positions are obtained using at least one sensor on the movable object. The video data is acquired by the imaging device.

    System and method for constructing optical flow fields
    5.
    发明授权
    System and method for constructing optical flow fields 有权

    公开(公告)号：US10904562B2

    公开(公告)日：2021-01-26

    申请号：US16415891

    申请日：2019-05-17

    Applicant: SZ DJI TECHNOLOGY CO., LTD.

    Inventor： Yannan Wu

    IPC: H04N19/527 ,  H04N19/513 ,  H04N19/172 ,  H04N19/182

    Abstract: A method for constructing an optical flow field includes classifying a plurality of scenarios according to motions of a mobile platform carrying an imaging device and statuses of the imaging device. The plurality of scenarios include at least one of elementary scenarios or combined scenarios. The method further includes constructing a plurality of optical flow fields each corresponding to one of the plurality of scenarios, acquiring a motion of the mobile platform and a status of the imaging device relative to the mobile platform, and selecting a corresponding optical flow field from the constructed optical flow fields corresponding to the plurality of scenarios based upon the motion of the mobile platform and the status of the imaging device for the imaging device to capture a frame at a shooting direction.

    METHOD OF SENSOR-ASSISTED RATE CONTROL
    6.
    发明申请
    METHOD OF SENSOR-ASSISTED RATE CONTROL 审中-公开

    公开(公告)号：US20170180729A1

    公开(公告)日：2017-06-22

    申请号：US15451999

    申请日：2017-03-07

    Applicant: SZ DJI TECHNOLOGY CO., LTD

    Inventor： Yannan Wu

    IPC: H04N19/115 ,  H04N19/51 ,  H04N19/124

    Abstract: Methods and systems of determining a quantization step for encoding video based on motion data are provided. Video captured by an image capture device is received. The video comprises a video frame component. Additionally, motion data associated with the video frame component is received. Further, a quantization step for encoding the video frame component is determined based on the motion data.

    METHODS OF MODIFYING SEARCH AREAS
    9.
    发明申请
    METHODS OF MODIFYING SEARCH AREAS 审中-公开

    公开(公告)号：US20170180754A1

    公开(公告)日：2017-06-22

    申请号：US15452680

    申请日：2017-03-07

    Applicant: SZ DJI Technology Co., Ltd.

    Inventor： Yannan Wu ,  Xiaozheng Tang ,  Wei Chen ,  Zisheng Cao ,  Mingyu Wang

    IPC: H04N19/57 ,  H04N19/513

    Abstract: Methods and systems for evaluating a search area for encoding video are provided. The method comprises receiving video captured by an image capture device, the video comprising video frame components. Additionally, the method comprises receiving optical flow field data associated with the video frame component, wherein at least a portion of the optical flow field data is captured by sensors. The method also comprises determining a search area based on the optical flow field data.

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