ABSTRAK
Generally, the function of scanner devices is to detect the object two-dimensionally- The signature as the object in this research work, instead of two-dimensional (2-f]) spatial parameter, it has one more parameter is the pressure of the pen to the paper. In order to detect the signature three-dimensionally (3-D), one 2-D array ultrasonic sensors and one pressure sensor are used. This 3-D information can be displayed on monitor (CRT), printed to the printer, and recorded to diskette as a file, respectively. To identified between the already recorded signature data to its standard, the spatial Correlation method is applicator.