| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact paper sheet identification device which accurately determines presence or absence of a motion thread in a paper sheet at high speed. <P>SOLUTION: A paper sheet identification device includes: a first light source for irradiating a paper sheet with light from a first direction; a second light source for irradiating the paper sheet with light from a second direction different from the first direction; a light source control portion for controlling the first light source and the second light source so as to irradiate the paper sheet with light from the first direction or the second direction; a transfer mechanism which transfers the paper sheet; a line sensor for receiving reflected light that has been emitted from the first direction and the second direction, and reflected by the paper sheet to be transferred by the transfer mechanism; an image processing portion for generating a first image imaged by the first light source and a second image imaged by the second light source from an output signal of the line sensor; and an identification portion for determining that the paper sheet has a motion thread when a thread image included in the first image is different from a thread image included in the second image. <P>COPYRIGHT: (C)2013,JPO&INPIT |
