Patent ID: 8320997
Filing Date: 2012-11-27
Classification: A61B,G06K

Abstract:
1. A vein authentication apparatus comprising: a light source unit for emitting a near infrared light having a predetermined wavelength to a surface of a finger rotating on its axis in a longitudinal direction; an imaging unit for imaging the finger surface, to which the near infrared light is emitted, at a predetermined time interval, and for generating a plurality of vein image data whose imaging ranges are different from each other; a vein pattern extraction unit for extracting a vein pattern from each of the plurality of vein image data; a rotational amount calculation unit for calculating a rotational direction and an amount of rotation of the finger associated with the rotational movement for each of the extracted vein patterns by using an imaging range of one of the vein patterns as a reference; a registration information selection unit for: a registration information compression unit for compressing, in accordance with the shift width of the imaging range, selected registration information when the shift width of the imaging range is equal to or more than the predetermined threshold value.