Apparatus, method, and program for biometric image processing

Patent metadata

Field	Value
Publication number	US-11227139-B2
Application number	US-201916363091-A
Country	US
Kind code	B2
Filing date	Mar 25, 2019
Priority date	Apr 2, 2018
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A biometric-image processing apparatus includes a touch panel, a memory, an image-capturing device configured to capture an image of a living body that is in contact with the touch panel to obtain a biometric image, and a processor coupled to the memory. The processor is configured to execute a process including: calculating a distance between the image-capturing device and the living body, and calculating a rotation angle of the living body to the image-capturing device based on the distance.

First claim

What is claimed is:

1. A biometric-image processing apparatus comprising:
a touch panel;
a memory;
an image-capturing device configured to capture an image of a living body when a part of the living body is in contact with the touch panel to obtain a biometric image; and
a processor coupled to the memory and configured to execute a process including:
calculating a distance between the image-capturing device and the living body, and
estimating a rotation angle, in a plane parallel to the touch panel, of the living body to the image-capturing device based on the calculated distance and a correspondence relationship between the distance and the rotation angle obtained in advance.

2. The biometric-image processing apparatus according to claim 1 , wherein the distance is calculated by using the biometric image.

3. The biometric-image processing apparatus according to claim 1 , wherein the process further including:
correcting the biometric image captured by the image-capturing device based on the rotation angle.

4. The biometric-image processing apparatus according to claim 1 , wherein the process further including:
registering a feature extracted from the biometric image and the rotation angle in a database in association with each other.

5. A biometric-image processing method performed by a computer comprising an image-capturing device and a touch panel, the method including:
capturing an image of a living body when a part of the living body is in contact with the touch panel by the image-capturing device;
calculating a distance between the image-capturing device and the living body, and
estimating a rotation angle, in a plane parallel to the touch panel, of the living body to the image-capturing device based on the calculated distance and a correspondence relationship between the distance and the rotation angle obtained in advance.

6. The biometric-image processing method according to claim 5 , wherein the distance is calculated by using the biometric image.

7. The biometric-image processing method according to claim 5 , wherein the method further including:
correcting the biometric image captured by the image-capturing device based on the rotation angle.

8. The biometric-image processing method according to claim 5 , wherein the method further including:
registering a feature extracted from the biometric image and the rotation angle in a database in association with each other.

9. A non-transitory computer-readable storage medium having stored a biometric-image processing program for causing a computer comprising an image-capturing device and a touch panel to perform a process including;
capturing an image of a living body when a part of the living body is in contact with the touch panel by the image-capturing device;
calculating a distance between the image-capturing device and the living body, and
estimating a rotation angle, in a plane parallel to the touch panel, of the living body to the image-capturing device based on the calculated distance and a correspondence relationship between the distance and the rotation angle obtained in advance.

10. The storage medium according to claim 9 , wherein the distance is calculated by using the biometric image.

11. The storage medium according to claim 9 , wherein the process further including:
correcting the biometric image captured by the image-capturing device based on the rotation angle.

12. The storage medium according to claim 9 , wherein the process further including:
registering a feature extracted from the biometric image and the rotation angle in a database in association with each other.

Assignees

• Fujitsu Ltd

Inventors

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

Classifications

• G06V40/1365

  Matching; Classification · CPC title

• G06F21/32 Primary

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

• G06V10/242

  by image rotation, e.g. by 90 degrees · CPC title

• G06V40/28

  Recognition of hand or arm movements, e.g. recognition of deaf sign language (static hand signs G06V40/113) · CPC title

• G06V40/1318

  using electro-optical elements or layers, e.g. electroluminescent sensing · CPC title