1. A biometrics authentication system for performing individual authentication by detecting and registering characteristic data of the palm of a hand of a body for future use, detecting characteristic data from the palm of the hand of said body and verifying the detected characteristic data against said registered characteristic data, said system comprising: an image capture unit which captures images of the palm of a hand of said body; a storage unit which stores the registered characteristic data of the palm of the hand of said body; and, a processing unit which extracts outlines from an image of the palm of said hand captured by said image capture unit, judges from said extracted outlines whether said image capture has been successful, extracts said characteristic data from an image of the palm of a hand judged to have been captured successfully, and registers said characteristic data in said storage unit, wherein said processing unit obtains an image of the palm of a hand of said body a plurality of times from said image capture unit, judges the degrees of similarity among characteristic data for each of said plurality of images of the palm of the hand, and registers in said storage unit a plurality of characteristic data sets with a high degree of similarity.