Biometric authentication apparatus and biometric authentication method

Patent metadata

Field	Value
Publication number	US-10896250-B2
Application number	US-201916258805-A
Country	US
Kind code	B2
Filing date	Jan 28, 2019
Priority date	Jan 30, 2018
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

A biometric authentication apparatus includes an imaging device, a display device, a memory, and a processor configured to display, on a screen of the display device, a guidance indicating a target area to be in contact with a part of a human body, detect whether the part of the human body is in contact with the target area, when the part of the human body is in contact with the target area, determine a distance between the imaging device and another part of the human body in accordance with an image captured by the imaging device, the image including the other part of the human body, and perform a change of a display position of the guidance in accordance with the determined distance.

First claim

What is claimed is:

1. A biometric authentication apparatus comprising:
an imaging device;
a display device;
a memory; and
a processor coupled to the memory and the processor configured to
display, on a screen of the display device, a guidance indicating a target area to be in contact with a part of a human body,
detect whether the part of the human body is in contact with the target area,
when the part of the human body is in contact with the target area, determine a distance between the imaging device and another part of the human body in accordance with an image captured by the imaging device, the image including the other part of the human body, and
perform a change of a display position of the guidance in accordance with the determined distance,

wherein the part of the human body is a plurality of fingers,
the target area includes two areas to be in contact with respective two fingers, and
the change includes changing a distance between the two areas.

2. The biometric authentication apparatus according to claim 1 , wherein
the change is executed when the determined distance is not suitable for capturing an image to be used biometric authentication.

3. The biometric authentication apparatus according to claim 1 , wherein
the distance is determined in accordance with a distribution of the frequency components of the image.

4. The biometric authentication apparatus according to claim 1 , wherein
the distance is determined in accordance with a distribution of pixel values of the image.

5. The biometric authentication apparatus according to claim 1 , wherein
the image includes a first image captured when the part of the human body is in a first position and a second image captured when the part of the human body is in a second position, and
the distance is determined in accordance with a movement quantity between the first position and the second position, and a movement quantity between a biometric feature included in the first image and a biometric feature included in the second image.

6. The biometric authentication apparatus according to claim 1 , wherein
the image is at least one of an image of a palm, an image including a base of a thumb, and an image including a base of a little finger.

7. A computer-implemented biometric authentication method comprising:
displaying, on a screen of a display device, a guidance indicating a target area to be in contact with a part of a human body;
detecting whether the part of the human body is in contact with the target area;
when the part of the human body is in contact with the target area, determining a distance between an imaging device and another part of the human body in accordance with an image captured by the imaging device, the image including the other part of the human body; and
changing a display position of the guidance in accordance with the determined distance,
wherein the part of the human body is a plurality of fingers,
the target area includes two areas to be in contact with respective two fingers, and
the changing includes changing a distance between the two areas.

8. The biometric authentication method according to claim 7 , wherein
the changing is executed when the determined distance is not suitable for capturing an image to be used biometric authentication.

9. The biometric authentication method according to claim 7 , wherein
the determining is executed in accordance with a distribution of the frequency components of the image.

10. The biometric authentication method according to claim 7 , wherein
the determining is executed in accordance with a distribution of pixel values of the image.

11. The biometric authentication method according to claim 7 , wherein
the image includes a first image captured when the part of the human body is in a first position and a second image captured when the part of the human body is in a second position, and
the determining is executed in accordance with a movement quantity between the first position and the second position, and a movement quantity between a biometric feature included in the first image and a biometric feature included in the second image.

12. The biometric authentication method according to claim 7 , wherein
the image is at least one of an image of a palm, an image including a base of a thumb, and an image including a base of a little finger.

13. A non-transitory computer-readable medium storing a program that causes a biometric authentication apparatus to execute a process comprising:
displaying, on a screen of a display device, a guidance indicating a target area to be in contact with a part of a human body;
detecting whether the part of the human body is in contact with the target area;
when the part of the human body is in contact with the target area, determining a distance between an imaging device and another part of the human body in accordance with an image captured by the imaging device, the image including the other part of the human body; and
changing a display position of the guidance in accordance with the determined distance,
wherein the part of the human body is a plurality of fingers,
the target area includes two areas to be in contact with respective two fingers, and
the change includes changing a distance between the two areas.

Assignees

• Fujitsu Ltd

Inventors

• Maeda Satoshi
• Abiko Yukihiro
• Hama Soichi
• Semba Satoshi
• Nada Hajime

Classifications

• G06V40/145

  Sensors therefor · CPC title

• G06V40/67 Primary

  by interactive indications to the user · CPC title

• G06F21/32 Primary

  using biometric data, e.g. fingerprints, iris scans or voiceprints · CPC title

• G06V40/1365

  Matching; Classification · CPC title

• G06V40/14

  Vascular patterns · CPC title