SYSTEMS AND METHODS FOR TWO-STAGE OBJECTION DETECTION

    公开(公告)号:US20240193805A1

    公开(公告)日:2024-06-13

    申请号:US18063819

    申请日:2022-12-09

    CPC classification number: G06T7/73 G06T3/0006 G06T7/13 G06V40/167

    Abstract: Example implementations include a method, apparatus and computer-readable medium for detecting an object in an image, by applying, on a first input image, a first object detector configured to generate a bounding box around the object in the first input image. The implementations further include identifying a first bounding box having a first bounding box size around the object in the first input image and determining that the first bounding box size is less than a threshold size. Additionally, the implementations further include generating a second input image by cropping an area of the original image corresponding to the first bounding box and identifying, by applying a second object detector on the second input image, a second bounding box around the object in the second input image. Additionally, the implementations further include performing an image analysis function on the object using information from the second bounding box.

    CAMERA CALIBRATION AND DISTANCE MEASUREMENT BASED ON HOMOGRAPHY

    公开(公告)号:US20240169589A1

    公开(公告)日:2024-05-23

    申请号:US18516131

    申请日:2023-11-21

    CPC classification number: G06T7/80 G06T7/60 G06T7/73 H04N17/002 G06T2207/30201

    Abstract: Example implementations include a method, apparatus and computer-readable medium for estimating a real world height in an image, comprising obtaining two images of an object, with known height, wherein each image depicts the object at a different position that is estimated using a homography matrix. The homography matrix transforms an image plane associated with the image to a real world plane. The implementations include generating a first vector that intersects with the object and points to a real world ground plane using the first image and a second vector that intersects with the same point on the object and points to the real world ground plane using the second image. Additionally, the implementations further include calibrating the camera by determining a height of the center of a camera lens of the camera using an intersection of the first vector and the second vector.

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