As a new technology of biometrics,gait recognition has its predominance among other biometric technologies while in computer vision research field it is a hard problem.

Biometrics is an emerging technology, which has unique advantages over traditional authentication technologies and has wide applications such as in financial, public security areas and in everyday life.

Based on the research of the cases in former dynasties,scholars in Song Dynasty absorbed their material evidence techniques and made renovations which brought said techniques to the full.