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Smart city fingerprint image multi-feature rapid matching algorithm

A fingerprint image and matching algorithm technology, which is applied in matching and classification, acquiring/arranging fingerprints/palmprints, computing, etc., can solve the problems of speeding up the matching speed, expensive time, and unguaranteed real-time performance, so as to achieve faster speed , the effect of reducing the cost

Pending Publication Date: 2021-03-02
SHANGHAI WISCOM SUNEST ELECTRIC POWER TECH
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AI Technical Summary

Problems solved by technology

When the fingerprint database is large, the existing algorithm only calculates the feature matching degree of the fingerprint image, and the matching algorithm only matches the feature points, and does not fully consider the characteristics of the fingerprint image itself to red

Method used

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  • Smart city fingerprint image multi-feature rapid matching algorithm
  • Smart city fingerprint image multi-feature rapid matching algorithm

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Embodiment Construction

[0023] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

[0024] The technical scheme of the present invention provides a multi-feature fast matching algorithm for smart city fingerprint images, comprising the following steps:

[0025] Step 1. Acquisition of fingerprint image: use a sensor to acquire a digital image containing fingerprint information, which is a grayscale image containing 0-255 grayscale.

[0026] Step 2. Preprocess the fingerprint image collected in step 1 through the image preprocessing module, mainly to make the fingerprint feature information more prominent, including operations such as fingerprint image segmentation, fingerprint image enhancement, denoising, binarization, and refinement. The information of the fingerprint is more prominent, the texture of the fingerprint is strengthened, and the accuracy of feature extraction is improved.

[0027] Step 3. Fingerpri...

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Abstract

The invention discloses a smart city fingerprint image multi-feature quick matching algorithm, which comprises the steps of fingerprint image acquisition, fingerprint image preprocessing, fingerprintfeature extraction, classification and hierarchical storage of fingerprint image descriptors, organization and classification according to a tree structure, and storage structure optimization. Layeredmatching is carried out on numerous features of the fingerprint image, and when shallow features are not matched, further deep feature matching is not carried out. During fingerprint matching, the number of matched fingerprints is reduced, and the fingerprint matching retrieval speed is increased. Aiming at the problem that the high-latitude feature matching time of each layer is expensive, a FLANN matching algorithm is adopted for feature matching, so that the matching speed is increased, and the cost of high-dimensional data matching is reduced.

Description

technical field [0001] The invention relates to a smart city fingerprint image multi-feature fast matching algorithm. Background technique [0002] The current fingerprint recognition technology is mainly divided into fingerprint matching algorithms based on minutiae features and texture features, which require a large number of feature extraction and matching algorithm operations, and the real-time performance is affected. With the continuous advancement of the construction process of smart cities and the deepening of applications, higher requirements are put forward for the real-time and accuracy of fingerprint identification. When the fingerprint database is large, the existing algorithm only calculates the feature matching degree of the fingerprint image, and the matching algorithm only matches the feature points, and does not fully consider the characteristics of the fingerprint image itself to reduce the number of matches and speed up the matching speed. When the dimen...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/62
CPCG06V40/1347G06V40/1365G06F18/22
Inventor 白乾龙温彦军薛旺喜黄亮亮马杰乔莉
Owner SHANGHAI WISCOM SUNEST ELECTRIC POWER TECH
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