本文结合人脸识别、指纹识别以及虹膜识别传统生物特征识别技术，对近年来研究人员在非限定生物特征方面的努力与成就进行回顾。-In this paper, face recognition, fingerprint recognition and iris recognition biometric technology, the traditional, to the limit in recent years, researchers in non-biological characteristi