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    • 4. 发明授权
    • Apparatus and method for detecting horizon in sea image
    • 海图中水平线检测装置及方法
    • US08275170B2
    • 2012-09-25
    • US11952811
    • 2007-12-07
    • Jae Kwang LeeChang Joon ParkIn Ho Lee
    • Jae Kwang LeeChang Joon ParkIn Ho Lee
    • G06K9/00G06K9/48G06K9/46
    • G06K9/3233G06T2207/30184
    • Provided is an apparatus and method for detecting a horizon which is necessary to detect a camera movement when compositing sea images in a marker-free sea-image camera tracking system. In the method, an ROI is selected near a horizon in a still image of the moving image of the sea, and each maximum point corresponding to the maximum brightness difference is detected from brightness differences between two pixels of each pair having two symmetrical pixels in each column of the ROI. The horizon is detected through a line-fitting using the maximum points. Therefore, the result of horizon detection can be very stable and a horizon can be easily detected in a sea scene having hundreds of frames.
    • 本发明提供了一种用于检测在无标记海图像摄像机跟踪系统中合成海图像时检测相机运动所必需的水平仪的装置和方法。 在该方法中,在海洋的运动图像的静止图像中在水平线附近选择ROI,并且从每个具有两个对称像素的每对的两个像素之间的亮度差中检测出与最大亮度差对应的每个最大点 ROI列。 通过使用最大点的线拟合来检测地平线。 因此,水平检测的结果可以非常稳定,并且在具有数百帧的海景中可以容易地检测到水平。