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New fingerprint database retrieval method

A database and fingerprint technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as unfavorable classification, achieve the effect of overcoming rotation and displacement, improving reliability and stability, and high academic application value

Inactive Publication Date: 2012-03-07
CHANGZHOU LENCITY INFORMATION TECH
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Problems solved by technology

In addition, the moment features mentioned above are calculated in the entire image space, and the global features of the image are obtained. This feature vector is not conducive to classification

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Embodiment Construction

[0023] The present invention will now be described in further detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0024] In the embodiment of the multi-level fingerprint database retrieval method based on invariant moment features described in the present invention, based on the research plan and theoretical block diagram of the invention, we perform three-level retrieval on the fingerprint database, that is, use the singular points for rough classification, and use the The second-level classification is carried out on the information between them, and the third-level classification is carried out by using the invariant moment feature, so as to achieve the purpose of fast and accurate retrieval. The following are respectively introduced...

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Abstract

The invention relates to a new fingerprint database retrieval method which comprises the following steps: carrying out coarse classification by using singularities; carrying out second-level classification by using information between the singularities; and carrying out third-level classification based on invariant moment features. In the invariant moment features based multilevel fingerprint database retrieval method disclosed by the invention, through introducing invariant moment features to establish a three-level indexing mechanism on an existing basis and extracting the orthogonal invariant moment features of ROI (regions of interest) (with a same reference point) of a fingerprint image in the third level, a defect that an input image has an effect on rotation and displacement is overcome, thereby improving the reliability and stability of a system. Research achievements of the invention have a high academic application value in the fields of fingerprint image analysis and identification, image retrieval, information security, and the like.

Description

technical field [0001] The invention relates to a multi-level fingerprint database retrieval method based on invariant moment features, which performs fingerprint database indexing through fingerprint categories, information between singular points and invariant moment features. Background technique [0002] Image database technology is the product of the combination of image processing technology and database technology. Traditional databases mainly process text and numbers. With the development of image database technology, indexing technology based on relational databases can no longer efficiently process image databases. The indexing mechanism and matching method of the fingerprint database are also very different from those of the image database. Practice has shown that fingerprint identification technology has high accuracy and reliability today. The application of various fingerprint identification technologies needs to be connected with the fingerprint database, an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G06K9/62
Inventor 吴军余人强李莉张辉
Owner CHANGZHOU LENCITY INFORMATION TECH
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