The edge or shape center of the defect is often adopted as matching points. But experimental results show that the methods can bring great errors.

一般采用缺陷边缘或缺陷形状中心作为匹配点进行视差计算，实验表明此类方法具有很大误差。

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Using Shape edge template matching technique to find the feature point and abstract the area of ROI automatically, calculate number of the pixels that the connected areas have to remove noise further.

提出了利用图形边缘模板匹配搜寻特征点自动提取ROI 区域，通过计算连通区域包含像素进一步去除噪声的方法。

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