抑制船尾拖纹的船舶显著性视频检测算法
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摘要
运动船舶尺寸等参数的视频检测中,与船体同步运动的水面拖纹干扰会严重影响检测精度。为此,文中在描述显著性检测机理的基础上,提出了抑制船尾拖纹的船舶显著性视频检测算法:根据颜色对比度直方图得到内河场景的HC显著图;将原图超像素分割成若干子区域,以区域空间位置关系改进HC显著性检测结果得到区域显著图;通过该区域显著图初始化GrabCut算法,迭代分割过程中加入腐蚀膨胀操作来逼近目标边缘,从而提取运动船舶。经实况视频测试表明,该算法能有效地抑制船尾拖纹,准确地检测出内河运动船舶,准确性达到94.6%。
In the video detection of parameters such as ship size,the synchronous movement of the stern ripples will seriously affect the accuracy.Therefore,this paper proposes a novel algorithm of stern ripples-driven ship detection in inland waterway based on visual saliency.First,the algorithm utilizes a histogram-based contrast(HC) method to define HC saliency map for inland waterway using color statistics of the input image.Then,it performs super-pixel segmentation on original image to get several sub-regions and uses regional spatial relationship to improve HC saliency test results,which named regional saliency map.Finally,the algorithm performs initialization of GrabCut method with the regional saliency map,and has iterative process by adding erosion and dilation operations to get close to the target edge,so that the moving ship is extracted.Experimental results show that compared to other schemes the proposed approach can effectively restrain the stern ripple,accurately detect the ship in inland waterway,and its accuracy is up to 94.6%.
引文
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