Biometric authentication device and biometric authentication method

An authentication device and biometric technology, applied in subcutaneous biometrics, neural learning methods, biometrics, etc., can solve the problems of decreased authentication accuracy, inability to correctly detect the position and posture of a biometric, and achieve high-precision authentication.

Pending Publication Date: 2022-04-22
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As such, in the conventional technology, in the biometric authentication using various living organisms represented by multiple fingers, the position and posture of the living body cannot be accurately detected under various external light environments, resulting in a decrease in authentication accuracy. subject

Method used

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  • Biometric authentication device and biometric authentication method
  • Biometric authentication device and biometric authentication method
  • Biometric authentication device and biometric authentication method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] Figure 1A It is a figure which shows an example of the overall structure of the biometric authentication system 1000 which uses the biometric characteristic of a finger in this Example. In addition, the structure of this embodiment may not be configured as a system, but of course may be configured as a device configured to mount all or a part of the structure on a housing. As for the device, it may be a personal authentication device including authentication processing, or a finger image acquisition device or a finger feature image extraction device that performs authentication processing outside the device and is specially made for obtaining finger images. In addition, it may also be an embodiment as a terminal. A configuration including at least an imaging unit that captures a biometric image, and an authentication processing unit that processes the captured image to perform biometric authentication is called a biometric authentication device.

[0097] Figure 1A Th...

Embodiment 2

[0159] Embodiment 2 is an embodiment related to the technique of estimating the distance between the camera and the object for each pixel by using the imaging device shown in Embodiment 1 and the image of the object composed of a plurality of wavelengths. The distance is used for the deformation correction and guidance of the living body, and the high precision of the living body authentication is achieved.

[0160] Figure 9 It is a schematic diagram of distance measurement of a subject using visible images and infrared images. In the present invention, the living body is photographed by light sources of different wavelengths, but generally, optical characteristics such as the refractive index of the camera lens are slightly different for each wavelength. Therefore, the imaging position and focal point may differ for each wavelength. Therefore, if the image is separately confirmed for each wavelength, although the image of one wavelength is in focus, the image of the other ...

Embodiment 3

[0171] In Example 3, based on the technology exemplified in Example 1 or Example 2, an authentication device that intuitively guides the presentation position of a living body without contact and is robust against changes in environmental lighting An example of is described.

[0172] Figure 11 (a) and (b) are an example of a biometric authentication device that guides the position of a fingertip to perform contactless authentication. A camera 9 is provided inside the input device 2, and a visible light source 41 and an infrared light source 42 are circumferentially arranged around it. The visible light source 41 and the infrared light source 42 can uniformly irradiate light to the finger 1 covered above, and the intensity of each light source can be independently controlled like the structure shown in the first embodiment. In addition, in Figure 11 In (a) and (b), only one finger is shown, but similarly to the above-mentioned Example 1, a plurality of fingers may be used,...

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Abstract

The invention provides a biometric authentication device and a biometric authentication method which can realize high-precision authentication even if deviation occurs in an external light environment when a living body is imaged. This biometric authentication device is provided with: an imaging unit that captures an image in which a living body has been captured; a light source for capturing an image of the living body; an optical filter that selectively passes and blocks light in accordance with the wavelength; a spectroscopic processing unit that separates each of a plurality of wavelengths captured simultaneously; a calculation unit that calculates the shape and orientation of a predetermined part of the living body in the captured image; a background removal unit that removes a background from the image of the living body using a spectral image obtained by capturing the image of the living body and a spectral image obtained by capturing unnecessary external light; and an authentication unit that performs biometric authentication using the image of the predetermined site.

Description

technical field [0001] The present invention relates to a biometric authentication device and a biometric authentication method for authenticating individuals using biometric information. Background technique [0002] Among various biometric authentication technologies, it is known that finger vein authentication can realize highly accurate authentication. Finger vein authentication uses complex blood vessel patterns inside the finger, so it achieves good authentication accuracy, and compared with fingerprint authentication, it is difficult to forge and falsify, so it can achieve high security. [0003] In recent years, cashless settlement represented by QR settlement in cooperation with personal smartphones has become popular in small stores such as convenience stores, restaurants, and the like. This kind of settlement method does not require cash payment, which is more convenient, and through the cooperation with various outlet services, it can increase customers' willing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06V40/13G06V40/70G06V10/82G06N3/04G06N3/08
CPCG06N3/04G06N3/08G06V40/1318G06V40/50G06V10/143G06V40/67G06V10/454G06V10/58G06V10/774G06V10/82G06V40/14G06T7/194G06T7/11G06T7/136G06T2207/10048G06T2207/10024G06T7/174G06T7/55G06T2207/20081G06T2207/20084G06V40/1324G06V40/1365G06V10/60G06V10/145G02B5/20G06F18/22
Inventor 三浦直人松田友辅长坂晃朗野野村洋中崎溪一郎
Owner HITACHI LTD
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