Fingerprint minutiae matching method syncretized to global information and system thereof

A technology of global information and detail points, applied in the field of fingerprint matching, can solve the problem of not being able to effectively distinguish different fingerprints with only local feature similarity, and achieve the effect of overcoming fingerprint mismatch, reducing the dependence of extraction accuracy, and improving performance

Inactive Publication Date: 2010-07-14
INST OF AUTOMATION CHINESE ACAD OF SCI
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Problems solved by technology

[0009] The purpose of the present invention is to propose and implement a fingerprint matching method based on global features that relies too much on the extraction accuracy of reference points, while fingerprint matching based on minutiae points cannot effectively distinguish different fingerprints that only have local feature similarities. The fingerprint minutiae point matching method and system t

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  • Fingerprint minutiae matching method syncretized to global information and system thereof
  • Fingerprint minutiae matching method syncretized to global information and system thereof
  • Fingerprint minutiae matching method syncretized to global information and system thereof

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Embodiment

[0151] We apply this method to the fingerprint image processing system designed and implemented by ourselves. The fingerprint image processing system developed by us is based on Window XP, adopts object-oriented design method and software engineering specification, realizes in C++ language, and is an image processing and analysis system oriented to the field of fingerprint identification.

[0152] In order to verify the overall performance of the fingerprint minutiae matching algorithm (hereinafter referred to as Algorithm A) integrated with global information in the present invention, we implemented a comparison algorithm (hereinafter referred to as Algorithm B). Algorithm B is traditional fingerprint minutiae matching without adding the handedness feature of minutiae points.

[0153] Apply the two algorithms to the aforementioned fingerprint image processing system, and do experiments on the 8 fingerprint databases provided by FVC2002 and FVC2004. Figure 14a to Figure 14...

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Abstract

The invention provides a fingerprint minutiae matching method syncretized to global information and a system thereof. The system realizes the entire matching process by an image acquiring unit, an image pre-processing unit, a feature extracting unit, a template storing unit and a feature matching unit, which specifically comprises the following steps: from the feature extracting unit, extracting the feature including the globe information, that is, minutiae handedness, and regarding the minutiae handedness, minutiae information, and minutiae local direction description as the feature to represent the fingerprint; measuring the similarity between the minutiaes by the minutiae handedness and the minutiae local direction description; selecting several pairs of minutiaes having the greatest similarity as an initial dot pair; registering the fingerprint feature and obtaining the corresponding matching fractions with each group of initial dot pair as a reference; selecting the maximum matching fraction in matching fractions as the finial matching fraction; judging whether the input fingerprint feature and the template fingerprint feature are from the same finger based on the final matching fraction, thereby finishing the minutiae matching of the fingerprint.

Description

technical field [0001] The invention belongs to the field of biometric feature identification, relates to frontier knowledge such as image processing, pattern recognition, and computer technology, and particularly relates to fingerprint matching realized by integrating global information into minutiae features. Background technique [0002] Fingerprint identification technology is one of the most mature technologies researched and applied in the field of biometric identification. Due to the advantages of uniqueness and stability, convenient collection process and low cost, fingerprints have been widely used in identification, information security, access control and many other aspects. [0003] Fingerprint identification technology mainly includes fingerprint image acquisition, fingerprint image enhancement, fingerprint image feature extraction, data storage, comparison and matching of fingerprint features and other steps. Among them, fingerprint image feature extraction an...

Claims

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Application Information

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IPC IPC(8): G06K9/64
Inventor 杨鑫田捷曹凯臧亚丽
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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