| 摘要 |
<p>PURPOSE:To precisely measure the depth of an image and to realize application in the case that a light wave is not used by picking up the face image of an object person by using an ultrasonic wave. CONSTITUTION:The system is constituted of an irradiation device 1, the face of the person to be discriminated 2 and a receiver array 3. The face 2 of the person who is the object to be discriminated is irradiated with the ultrasonic wave 1 and the scattered wave thereof is measured by the array-state plural echo sounder receivers 3. Besides, the three-dimentional image of the face 2 of the object person is obtained by separating the face 2 in the XY direction in a holographic method and separaing it in the Z direction in terms of time. Then, the person is discriminated by comparing the result with a dictionary which is previously prepared and which is concerned to the three-dimentional image of the face of the person. Thus, the three-dimentonal face image of the object person is obtained even in the case that the depth of the image s not precisely measured or the light wave is not used.</p> |
