Image input apparatus and person authentication system using an image input apparatus

Abstract

A blood vessel image input apparatus is provided which is capable of acquiring a high-precision image of blood vessels of a body part, such as a finger, even if the finger is swept at a non-constant speed. The apparatus includes a solid-state line image sensor, a light source for illuminating the inside of the finger with light, an imaging optical system adapted to focus the light, emitted from the light source and passed through the inside of the finger, on the solid-state line image sensor such that a blood vessel image representing a network structure of veins in the finger is formed on the solid-state line image sensor, and a blood vessel image forming unit adapted to form a complete image of blood vessels by connecting a plurality of partial blood vessel images captured by the solid-state line image sensor while sweeping the finger.

Description

technical field [0001] The present invention relates to an image input device suitable for obtaining a blood vessel image of a finger of a person to be identified by using a solid-state image sensor to detect light emitted from a light source and passing through the finger, and to an individual using the image input device identification system. More particularly, the present invention relates to a method suitable for obtaining a blood vessel image of a finger of a person to be discriminated by using a solid-state image sensor to detect light emitted from a light source and passing through the finger when the relative position between the finger and the solid-state image sensor is moved. and relates to a personal authentication system using such an image input device. Background technique [0002] In recent years, with the advancement of information technology, business activities using electronic commerce have become popular. In electronic commerce, it is necessary to ele...

AI Technical Summary

Problems solved by technology

[0013] However, because the scanning type blood vessel image input device obtains multiple blood vessel images of the finger of the person (object) to be identified when the person scans the finger, the scanning speed of the finger is not constant.

The non-constant scanning speed of the finger causes the relative positional relationship between the multiple vessel images to become uncertain, so simple concatenation of multiple captured vessel images cannot obtain a complete image with high accuracy

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