Fingerprint identification system and method for resisting remaining fingerprint
A fingerprint identification and fingerprint technology, which is applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of unoptimized residual rejection rate and legal use pass rate, and increase the burden on the software and hardware of the fingerprint identification system. The effect of reducing computational complexity and improving recognition rate
Inactive Publication Date: 2012-10-24
合肥方程式电子科技有限公司
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For example, the disadvantage of the patent with application number 200410063915.3 is that the invention patent adds a residual image judgment method based on the image domain in addition to the matching algorithm, which not only increases the software and hardware burden of the fingerprint recognition system, but also due to the development of the fingerprint recognition algorithm , the fuzzy fingerprints that cannot be directly judged by the image can be identified, and the residual image belongs to the fuzzy fingerprint image. The deception mechanism of the image domain processing is different from that of the fingerprint residue, so the processing method based on the image domain leads to two problems: the residual rejection rate and the legitimate use pass rate. indicators can not achieve the optimal
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[0020] The present invention will be described in detail below with reference to the accompanying drawings.
[0021] figure 1 It is a system functional block diagram of the present invention, including an image acquisition unit 1, an image processing unit 2, a feature extraction unit 3, a fingerprint matching unit 4, a fingerprint residue determination unit 5, a fingerprint registration unit 6, a matching template unit 7 and a temporary template unit 8 .
[0022] The image collection unit 1 collects fingerprint images by using a contact fingerprint sensor, such as an optical fingerprint sensor or a capacitive fingerprint sensor, and sends the collected images to the image processing unit 2 .
[0023] The image processing unit 2 performs processing such as image enhancement, smoothing, image binarization, and image thinning on the collected images, mainly for the purpose of making preparations for the effectiveness and accuracy of feature extraction.
[0024] The feature valu...
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The invention provides a fingerprint identification method for resisting remaining fingerprint, comprising the steps of: A. storing a fingerprint characteristic template which is successfully matched for the last time and is not remained fingerprint or a fingerprint characteristic template which is successfully registered for the last time to a temporary template unit as a third fingerprint characteristic template; and B. matching the first fingerprint characteristic template which is successfully matched in a fingerprint matching unit with a third fingerprint characteristic template and judging whether the first fingerprint characteristic template is fingerprint remaining or not according to the obtained matching score and geometric transformation vector information. Based on a matching algorithm and by adopting a characteristic filed judging method same as a fingerprint remaining deceiving mechanism, the invention can accurately identify the remaining, reduce the calculation complexity and improve the identification speed rate.
Description
technical field [0001] The invention relates to a fingerprint identification system and method, in particular to a fingerprint identification system and method capable of effectively resisting fingerprint residues. Background technique [0002] With the development of computer image processing technology and information technology, fingerprint recognition technology has gradually entered the field of IT technology and combined with many computer information systems. In recent years, the demand for identity authentication has continued to grow. With the gradual acceptance and recognition of the public, fingerprint recognition systems will be more widely used. [0003] The fingerprint identification system is mainly composed of fingerprint acquisition sensors and fingerprint identification algorithms. The former obtains digital images from fingerprints, and the latter can perform fingerprint image processing, fingerprint feature extraction and fingerprint feature matching algo...
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IPC IPC(8): G06K9/00
Inventor 李扬渊王卉芳
Owner 合肥方程式电子科技有限公司