After analyzing the automatic fingerprint recognition based on structural features, we improved it and put forward a step by step structural matching method. The recognition is grouped two step.
分析了基于结构匹配的指纹自动识别方法，并对其作出了改进，提出了一种分阶段的结构匹配识别方法，把识别分为两步进行。
A two-step matching method for 3d face recognition is proposed. Feature points are detected based on curvature and geometric constraint.
针对3维人脸识别问题，提出一种由粗到细的两步识别方法。
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