Handwritten data input device and method, and authenticating device and method

Abstract

There are provided a device and method for enabling entry of handwritten data, such as a signature, without use of an electronic tablet. In step S-, a user affixes a signature by means of moving a pen devicein midair. In step S-, camera meansphotographs the pen deviceand outputs the resultant image data. In step S-, coordinate computation meansdetermines coordinates of a pen tip of the pen meanson a screen on the basis of the image data (motion picture data), thereby determining signature data. In step S-, comparison verification meanscompares and verifies the thus-determined signature data with reference data. If a similarity exists between the signature data and the reference data, there is output an authentication result showing 'authentication of verification.' Thus, personal identification can be effected on the basis of the signature data written by the user in midair.