发明名称 |
FINGERPRINT RIDGE IMAGE SYNTHESIS SYSTEM, FINGERPRINT RIDGE IMAGE SYNTHESIS METHOD, AND PROGRAM THEREOF |
摘要 |
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. |
申请公布号 |
EP2851869(A1) |
申请公布日期 |
2015.03.25 |
申请号 |
EP20130791452 |
申请日期 |
2013.05.16 |
申请人 |
NEC SOLUTION INNOVATORS, LTD. |
发明人 |
YOSHIDA AMANE |
分类号 |
G06T7/00;G06K9/00;G06K9/48;H04N19/635 |
主分类号 |
G06T7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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