Abstract
An efficient and above all cheap solutions, biometrics provide extensive information in access control applications. 3D mode provides great new opportunities in this sector in recent years. Firstly the paper discusses the formal work done in this domain discussing approach based on curvature calculation, alignment of surfaces, feature selection and facial curve including different techniques for 3D facial recognition data. The second part is about the steps required for the preprocessing phase of the 3D face data. Various experiments conducted and results obtained.