改进多尺度Canny算子在SAR图像边缘提取中的应用

着重讨论了在原始Ｃａｎｎｙ算子基础上提出的一种改进算法。其主要特点在于将多尺度分析的概念引入到基本Ｃａｎｎｙ算子中，从而改善了Ｃａｎｎｙ算子的检测性能，使其更加适应合成孔径雷达（ＳＡＲ）图像受噪声影响较大的特点。最后在原始ＳＡＲ图像基础上，将改进的算法与基本Ｃａｎｎｙ算子及其它几类边缘检测算子作了性能对比实验。实验结果显示了改进Ｃａｎｎｙ算子的良好检测性能。

IMPROVED MULTISCALE CANNY OPERATOR IN SAR IMAGE EDGE DETECTION

Considering that image edge detection is a fundamental step in many SAR image processing technologies, this paper concentrates on proposing an improved algorithm based on basic Canny operator, whose characteristic mainly lies in the introduction of conception of multiscale analysis into the basic Canny algorithm, thus improving its detecting performance and fitting it with the SAR image feature of suffering heavy noise. At the end of the paper, performances of the improved algorithm is compared with basic Canny operator and other edge operators through experiments on the basis of original SAR images. Experimental results show the fine performance of our improved Canny operator.