Image processing device, fingerprint collation system, image processing method, and recording medium

Patent metadata

Field	Value
Publication number	US-11893824-B2
Application number	US-202017429827-A
Country	US
Kind code	B2
Filing date	Feb 10, 2020
Priority date	Feb 14, 2019
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

An image processing device outputs, by using a result of machine learning, an image including three or more gradations and indicating a central line in response to an input of a fingerprint image, the machine learning being performed by using data including at least a fingerprint image, central line information indicating a central line in the fingerprint image, and zone information indicating a zone that is a portion of the fingerprint image which is effective for fingerprint collation, and generates a binary central line image based on the output image.

First claim

What is claimed is:

1. An image processing device comprising:
at least one memory configured to store instructions; and
at least one processor configured to execute the instructions to:
output, by using a result of machine learning, an image including three or more gradations and indicating a central line in response to an input of a fingerprint image, the machine learning being performed by using data including at least a fingerprint image, central line information indicating a central line in the fingerprint image, and zone information indicating a zone that is a portion of the fingerprint image which is effective for fingerprint collation; and
generate a binary central line image based on output image.

2. The image processing device according to claim 1 ,
wherein the at least one processor is configured to execute the instructions to: generate information indicating a zone of the output image.

3. The image processing device according to claim 1 , further comprising:
display configured to display a plurality of central line images generated by a plurality of methods, the plurality of central line images including the generated central line image; and
an interface configured to receive a user operation of selecting any one of the plurality of central line images.

4. The image processing device according claim 1 , further comprising:
display configured to display the output image.

5. A fingerprint collation system comprising:
the image processing device according to claim 1 ;
wherein the at least one processor is configured to execute the instructions to:
extract feature points from the central line image obtained by the image processing device; and

perform fingerprint collation using the extracted feature points.

6. An image processing method comprising:
outputting, by using a result of machine learning, an image including three or more gradations and indicating a central line in response to an input of a fingerprint image, the machine learning being performed by using data including at least a fingerprint image, central line information indicating a central line in the fingerprint image, and zone information indicating a zone that is a portion of the fingerprint image which is effective for fingerprint collation; and
generating a binary central line image based on the output image.

7. A non-transitory computer-readable recording medium storing a program which causes a computer to execute:
obtaining an image by applying, to a collation target fingerprint image, processing of outputting, by using a result of machine learning, an image including three or more gradations and indicating a central line in response to an input of a fingerprint image, the machine learning being performed by using data including at least a fingerprint image, central line information indicating a central line in the fingerprint image, and zone information indicating a zone that is a portion of the fingerprint image which is effective for fingerprint collation; and
generating a binary central line image based on the obtained image.

Assignees

• Nec Corp

Inventors

• Fukuda Junichi
• Hirokawa Akira
• Inoue Mamoru

Classifications

• G06V40/1347 Primary

  Preprocessing; Feature extraction · CPC title

• G06N20/00

  Machine learning · CPC title

• G06T7/11

  Region-based segmentation · CPC title

• G06T2207/20021

  Dividing image into blocks, subimages or windows · CPC title