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Fingerprint authentication system, fingerprint authentication method, and fingerprint authentication program
US8942439B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8942439-B2 |
| Application number | US-201113696518-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 18, 2011 |
| Priority date | Jun 4, 2010 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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To improve the precision with which a false finger formed by attaching a transparent thin film to a surface of a finger is identified, a fingerprint authentication system includes: an image division unit 31 that divides a captured image of an authentication subject to be subjected to fingerprint authentication into a plurality of small regions; a frequency analysis unit 32 that performs a frequency analysis on each of the small regions; a ridge candidate extraction unit 33 that extracts frequency components corresponding to ridge candidates in the small regions from frequency components obtained in the frequency analysis; a continuous ridge candidate group generation unit 34 that compares the ridge candidates between adjacent small regions, and when the ridge candidates satisfy a condition enabling the ridge candidates to be determined continuous, generates a continuous ridge candidate group including the ridge candidates; and a determination unit 35 that determines that an abnormality exists in the image when overlap exists between the image regions corresponding to the continuous ridge candidate group.
First claim
Opening claim text (preview).
What is claimed is: 1. A fingerprint authentication system comprising: an image division unit that divides a captured image of an authentication subject to be subjected to fingerprint authentication into a plurality of small regions; a frequency analysis unit that performs a frequency analysis on each of the small regions; a ridge candidate extraction unit that extracts frequency components corresponding to ridge candidates in the small regions from frequency components obtain…
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- A61B5/1172Primary
Human Necessities · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8942439B2 cover?
- To improve the precision with which a false finger formed by attaching a transparent thin film to a surface of a finger is identified, a fingerprint authentication system includes: an image division unit 31 that divides a captured image of an authentication subject to be subjected to fingerprint authentication into a plurality of small regions; a frequency analysis unit 32 that performs a f…
- Who is the assignee on this patent?
- Monden Akira, Nec Corp
- What technology area does this patent fall under?
- Primary CPC classification A61B5/1172. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).