The whole process can be divided into two steps: First, the method of surface fitting with discrete orthogonal polynomial is applied to detection of edge position.
整个处理过程分为两步：第一，采用离散正交多项式曲面拟合技术探测边缘位置；第二，运用松弛标定网突出有意义的边缘结构和压缩噪声边缘。
Sensitivity is different for different differential operators, how to choose a suitable edge detection operator to obtain exact information of edge, is the essential step for fracture surface image.
不同的微分算子对边缘的敏感程度是不同的，如何选用适当的边缘检测算子得到准确的边缘信息，就成为断口图像处理的关键步骤。
The experiment results demonstrate that the proposed algorithm enhances the precision of edge detection and satisfies the requirement of vision detecting in SMC ( surface mounting machine) mounting.
通过实验比较，认为该方法提高了边缘提取的精度，满足了贴片机视觉检测的要求。
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