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Finger vein authentication unit

A finger vein, authentication device technology for instrumentation, diagnostic recording/measurement, subcutaneous biometrics, etc.

Active Publication Date: 2011-09-21
HITACHI INFORMATION & CONTROL SOLUTIONS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, Patent Document 4 discloses a structure in which a position sensor with a touch screen recognizes the range of the shape of a finger and lights up a corresponding near-infrared light source. The position sensor described in this Patent Document can also detect the rotation of a finger. Offset and tilt, etc., but this is not specified in the literature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] image 3 It is a perspective view of the finger vein authentication unit 101 using the present invention. The portion where the tip of the finger is placed is provided as a flat surface, and if necessary, a sufficiently shallow recess that does not interfere with the nail may be provided. A touch sensor 5 is attached to the portion where the tip of the finger is placed, and the touch sensor 5 is constituted by an electrostatic sensor and has a plurality of detection areas divided into an X-Y matrix. The image of the finger veins is taken by the infrared camera 6 installed on the lower side through the near-infrared light transmission filter 2 . The near-infrared light is irradiated toward the finger from the top or the side of the finger. Based on the data of the touch sensor 5 and the infrared camera 6 , a predetermined matching template is generated by the image processing device 200 , and authentication processing is performed by the authentication processing devic...

Embodiment 2

[0075] In a small open finger vein authentication device, by setting the imaging window W narrower than the finger, the imaging window W can be completely covered by the finger to avoid being affected by external light. At this time, due to the small imaging window W, only Figure 8 The shown image acquisition area is part of the image, so the outline of the finger cannot be acquired from the image of the infrared camera 6 . At this time, by further attaching a touch sensor to the root side of the finger, it is possible to detect the rotational displacement of the finger without outline data.

[0076] Such as Figure 8 As shown, according to point A, point B and point A' of the contact surface of the finger detected in the finger tip touch sensor detection area 12 and the finger root touch sensor detection area 13 respectively connected to the upper and lower parts of the infrared camera detection area 8 The angle of rotation of the finger is calculated from the inclinations...

Embodiment 3

[0080] When the finger is pressed hard, the front end of the finger will expand into a flat shape, so that the contact surface between the finger and the touch sensor 5 will increase, causing the data detected by the touch sensor 5 to be different from the data at the time of login. On the contrary, if the pressing force is too weak, the contact surface between the finger and the touch sensor 5 will become smaller, which may cause the data detected by the touch sensor to be different from the data at the time of login. If the detection data of the touch sensor 5 are different at the time of login and at the time of authentication, the authentication rate will decrease.

[0081] In order to avoid the above situation, if Figure 9 As shown, a pressure sensor P is installed directly under the touch sensor 5 to detect the pressing force of the finger 4 on the touch sensor 5 . The range of pressure that enables login and authentication is determined in advance, and when the pressu...

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PUM

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Abstract

The present invention provides a finger vein authentication unit which solves problems such that a turn of a finger around the finger as an axis cannot be detected from an image of the finger, a finger cannot be placed normally because the nail is caught in a dent portion, and an image of the contour of a finger cannot be obtained by an image capturing method using an image pickup window which isnarrower than a finger and is completely closed with a finger so that a turn of a finger cannot be detected from the counter. A touch sensor having an X-Y matrix capable of obtaining the position andshape of a fingertip is mounted in a fingertip placement part, and the fingertip placement part is formed in a flat shape so that a finger is easily put. From the data of the position and shape of the fingertip read by the sensor, a turn of the finger around the optical axis of the camera as a center, a turn of the finger around the finger as an axis, and a positional deviation of the finger are detected. On the basis of the data, the vein is extracted accurately and used for a guidance to the user so that the user can put his / her finger in the correct position.

Description

technical field [0001] The invention relates to a finger vein authentication device. Background technique [0002] In the biometric authentication technology, since the vein authentication utilizes the vein pattern inside the living body for authentication, it is more difficult to forge and tamper than the fingerprint authentication, so that a higher security biometric authentication device can be realized. Among the vein authentication devices, finger vein authentication devices that use finger vein patterns for authentication can be further miniaturized and easily assembled in equipment compared with other vein authentication devices such as palm vein authentication devices, so they are widely used in various fields. Wide application prospects. [0003] In the finger vein authentication device, using the feature that the finger vein absorbs near-infrared light and the part other than the vein transmits near-infrared light, by irradiating the near-infrared light on the fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06K9/00912G06K2009/00932A61B5/6826G06K9/00919A61B5/6838A61B5/1172A61B5/6843G06V40/67G06V40/63G06V40/14G06V10/20
Inventor 喜种佳司
Owner HITACHI INFORMATION & CONTROL SOLUTIONS LTD