Finger multimodal preprocessessing method based on maximum circumscribing matrix region-of-interest extract and bilateral filtering

Abstract

The invention discloses a finger multimodal preprocessessing method based on maximum circumscribing matrix region-of-interest extract and bilateral filtering. The method comprises the following steps: firstly, gathering finger vein and finger phalangeal print images; secondly, performing finger multimodal preprocessessing on the gathered images, based on maximum circumscribing matrix region-of-interest extract and bilateral filtering, and removing background areas in the finger images through binaryzation, obtaining a final finger vein ROI area by solving the maximum circumscribing matrix among key areas, and then cutting an finger phalangeal print ROI area in the finger phalangeal print image according to the finger vein ROI area; finally normalizing the images, and performing filtering on the normalized images through a bilateral filter; thirdly, performing image layer fusion on the processed images, based on wavelet transform and Gabor filtering. The method is rich in information and high in security.

Description

Technical field [0001] The invention relates to the technical field of contact biometric identification, in particular to a preprocessing method for finger multimodal fusion. Background technique [0002] With the rapid development of information technology, people's demand for information security is getting higher and higher. Traditional identity authentication methods are based on identifiers (keys, certificates) and knowledge (card numbers, passwords), but these external objects are easily forged and forgotten. Compared with traditional identity authentication, biometrics have the advantages of uniqueness, no need to remember, not easy to forge, and easy to use. The identification method based on biometrics has largely solved the problems of traditional identity authentication and gradually replaced traditional identity. Authentication has become the main method of current identity authentication. The finger is one of the important organs for humans to perceive the external...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of single information and low security in the existing identity authentication methods, the present invention provides a finger multi-modal pre-prediction method based on maximum circumscribed matrix ROI extraction and bilateral filtering, which is rich in information and high in security. Approach

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