一种改进的SAR图像边缘检测方法
doi: 10.3724/SP.J.1146.2005.00824
An Improved Edge Detection Algorithm for SAR Images
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摘要: 加权指数平均比率(ROEWA)边缘检测算子是一种较好的适用于SAR图像的边缘检测算子，但使用传统的计算梯度方向的方法却无法正确确定边缘点的方向。针对ROEWA算子存在的问题，该文根据Gabor滤波器具有的优秀的方向选择性这一性质，提出利用Gabor滤波器确定边缘方向的方法，完善了ROEWA边缘检测方法。实验结果证明，改进的ROEWA算子检测边缘及边缘方向的性能很好。Abstract: Ratio Of Exponentially Weighted Averages (ROEWA )operator is an edge detector suitable for SAR images. However, the detector can not compute the direction of edges accurately. Due to the excellent directional selectivity of Gabor filters, this paper puts forward a method of utilizing Gabor filter to computer edge direction. And by this way, the edge detector is improved. Experimental results prove that the performance of the improved method is satisfactory.
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