Fingerprint ridge image synthesis system, fingerprint ridge image synthesis method, and program thereof
US9323974B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 2013 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | May 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/478
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A fingerprint ridge image synthesis system, configured to accurately extract the shape of the ridges contained in a fingerprint image and clearly reproduce the fingerprint of the fingerprint image on an image, includes: a ridge pixel parameter calculation unit that calculates parameter values including wavelet phase, ridge angle, and inter-ridge distance corresponding to each pixel by means of applying continuous wavelet conversion with respect to the gradient of each pixel contained in the fingerprint image; a label optimization processing unit that optimizes/converts the parameter values corresponding to each pixel to values indicating the mutual continuity with the parameter values in surrounding pixels; and a ridge image generation unit that generates the ridge image by means of converting each pixel gradient in the fingerprint image on the basis of the optimal value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.