| 摘要 |
A mobile phone includes a photograph section that takes a picture of an object to be authenticated; a face-image comparison section that compares the face image taken by the photograph section with a registered face image; and a distance sensor and a distance determination section that measure the distance to the object's face. When the photograph section takes a picture of an object to be authenticated, the distance determination section measures the distance to the object's face using the distance sensor. Then a 3D-or-2D determination section authenticates the object's face from the measured distance. When the object's face is false, an authentication-result output section outputs authentication failure. |
