| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vein image acquisition device capable of more faithfully reproducing a vein pattern appeared on the surface of a stereoscopic finger without being influenced by the imaging direction of the finger. <P>SOLUTION: A vein image acquisition device 3 comprises: an illumination part 11 for applying illumination light to a finger placing surface 10 and a finger 2 thereon; and an imaging part 12 for acquiring a plane projection image G1 by imaging a shadow 13a of a vein 13 projected by the illumination light on a surface 2b of the finger 2. The vein image acquisition device 3 also includes a surface shape set part 16 and an image process part 17. The surface shape set part 16 sets the surface 2b of the finger 2 as a cylindrical surface S1 according to a calculation result obtained from the plane projection image G1. The image process part 17 processes the plane projection image G1 to generate a stereoscopic surface projection image G2 of the plane projection image G1 projected on the cylindrical surface S1, and further processes the stereoscopic surface projection image G2 to acquire a plane development projection image G3 of the plane projection image G1 projected on the cylindrical surface S1, spread in a plane, and adopts the plane development projection image G3 as a vein image. <P>COPYRIGHT: (C)2012,JPO&INPIT |
