PORTABLE TERMINAL, AND GRIP CHARACTERISTIC LEARNING METHOD

摘要

A portable terminal includes a former-template storage that stores an old authentication template used for authentication in a portable terminal used in the past, as a former template; a sensor-position storage that stores the positions of sensors in the portable terminal currently being used; a sensor-position correcting section that acquires the former template and the positions of the sensors and applies interpolation to the former template according to the positions of the sensors to generate an interpolated template; a gripping-feature sample acquisition section that acquires a gripping feature sample from a sensor array; a template comparison section that compares the interpolated template with the acquired gripping feature sample and calculates an inter-vector distance therebetween; and a template storage that stores the interpolated template as an authentication template when the inter-vector distance between the interpolated template and the acquired gripping feature sample is equal to or shorter than a predetermined value.