提出了利用圆率线及圆率差分突变来交互拾取曲线特征点的方法，实现了特征点的识别和提取。
The method that interactively extract feature points based on curvature difference break is proposed to complete extracting feature points.
提出了利用圆率线及圆率差分突变来交互拾取曲线特征点的方法，实现了特征点的识别和提取。
The method that interactively extract feature points based on curvature difference break is proposed to complete extracting feature points.
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