关键词: 成像特性, Sobel算子, 感兴趣区域, 中心点

Abstract: Because of being restricted by the physics rule during the forming process，ocean wave presents feebleness fringe approximately paralleled to the coasting.Contrary，objects present stronger fringe in all directions.Based on the different imaging characteristic between ocean wave and objects，this paper brings forward segmenting those regions of interest in one frame of image using Sobel arithmetic operators，and then detecting the moving targets in those regions of interest based on the moving of the center of the interested region.Experimental results show that the method can minish the probability of dis-detecting and leak-detecting，and detect the moving targets robustly and accurately.

Key words: imaging characteristic, sobel arithmetic operators, regions of interest, center