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    • 6. 发明授权
    • Fast obstacle detection
    • 快速障碍物检测
    • US08848978B2
    • 2014-09-30
    • US13234499
    • 2011-09-16
    • Zhang YankunHong ChuyangNorman Weyrich
    • Zhang YankunHong ChuyangNorman Weyrich
    • G06T1/00G06K9/00G06T7/20
    • G06K9/00805G06T7/194G06T7/254G06T2207/10016G06T2207/20224G06T2207/30261
    • Systems and methods for detecting obstacles using a single camera positioned on an apparatus in motion over an area of motion, or stationary over a moving area of motion. In an example method, a video stream of images is captured of the area of motion. The images in the video stream may be corrected for lens distortion prior to further processing. An Nth image frame is selected from a sequence of N images in the video stream. A set of N−1 difference images is calculated by subtracting each of the N−1 previous images from the Nth image. The N−1 difference images are added to one another to generate a combined difference image. A perspective transformation is performed on the combined difference image to generate a transformed image. The transformed image is analyzed to detect edges of obstacles in the transformed image. A signal indicating detection of an obstacle in the area of motion may then be generated.
    • 使用位于运动区域上的装置上的单个照相机来检测障碍物的系统和方法,或者在运动的运动区域上静止。 在示例性方法中,捕获运动区域的视频图像流。 视频流中的图像可以在进一步处理之前针对透镜畸变进行校正。 从视频流中的N个图像的序列中选择第N个图像帧。 通过从第N图像中减去N-1个先前图像中的每一个来计算一组N-1个差分图像。 将N-1个差分图像彼此相加以生成组合差分图像。 对组合的差分图像执行透视变换以产生变换图像。 分析变换图像以检测变换图像中的障碍物的边缘。 然后可以产生指示运动区域中的障碍物的检测的信号。