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。
Experimental results of extracting feature points on different natural 2-d images proved that the threshold value determined was reasonable and effective.
通过对不同自然二维图像的特征点提取，证明了文中所确定的阈值是合理、有效的。
Based on the different facial characters of ID photo, the paper proposes several methods to locate feature points for extracting the facial feature exactly.
根据证件照片中脸部各个对象的不同特征，分别采用不同的定位方法进行定位。
Based on the different facial characters of ID photo, the paper proposes several methods to locate feature points for extracting the facial feature exactly.
根据证件照片中脸部各个对象的不同特征，分别采用不同的定位方法进行定位。
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