Method for lip feature-based identity authentication based on sparse coding

A sparse coding and identity authentication technology, which is applied in the field of information security, can solve the problems of lack of lip language feature expression with identity discrimination, lack of identity authentication mechanism, and insufficient accuracy of lip language feature extraction, achieving fast speed and high processing speed , the effect of strong robustness

Inactive Publication Date: 2016-07-20
SHANGHAI JIAO TONG UNIV +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The disadvantages are: 1) the extraction accuracy of lip language features is insufficient; 2) the expression of lip language features with identity discrimination is lacking; 3) the identity authentication mechanism suitable for lip language features is lacking

Method used

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  • Method for lip feature-based identity authentication based on sparse coding
  • Method for lip feature-based identity authentication based on sparse coding
  • Method for lip feature-based identity authentication based on sparse coding

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Embodiment Construction

[0047] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0048] According to the lip language feature identity authentication method based on sparse coding provided by the present invention, the speaker's identity can be identified, and the consistency between the declared identity and the real identity can be judged. At the same time, the input video data is processed efficiently and a high accuracy rate is achieved.

[0049] Specifically, the lip region segmentation algorithm is used to automatically identify the lip region of the face picture, and th...

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Abstract

The invention provides a method for lip feature identity authentication based on sparse coding. The method includes the following steps: a first step of in accordance with the position of the lip, extracting a lip image block from an input video; a second step of establishing a sparse coding featuring dictionary group, reconstructing the lip image block, calculating reconstructing errors; a third step of in accordance with the reconstructing errors, identifying and authenticating the identity of a speaking user. According to the invention, the method takes physiological structure of the lip and behavior habit double features into consideration simultaneously, gets more information from lip features, and increases accuracy of identification. The method adopts the sparse coding algorithm to better confront all kinds of noise caused by environment and personal factors of the speaker, and has a strong robustness. The method uses reconstructing of the sparse coding and the reconstructing errors as determining basis, and a computer has a high execution efficiency and rapid speed.

Description

technical field [0001] The present invention relates to the technical field of information security, in particular to a lip language feature identity authentication method based on sparse coding. Background technique [0002] In the past few years, biometrics have been widely used in identity authentication. Some relatively mature biometrics, such as fingerprints, pupils, faces, etc., have already left the laboratory and have been applied commercially. Some recent works have shown that visual and motion information in the lip region can provide sufficient information for speaker authentication. Therefore, it is expected to become a new biometric feature and be applied to identity authentication. [0003] Different from traditional biometrics, lip biometrics contain dual information of physiological structure and behavior habits to determine the identity of the speaker. Different people have different shapes and textures of the lip area (gray level change of the lip area),...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06F21/32
CPCG06F21/32G06V40/171G06V40/20G06V20/41
Inventor 王士林赖骏尧夏霙李翔裘瑛
Owner SHANGHAI JIAO TONG UNIV
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