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Face microexpression recognition method

A recognition method and micro-expression technology, applied in the field of recognition graphics, can solve problems such as low recognition performance, and achieve the effect of simplifying the iterative process, reducing dimensions, and improving accuracy

Inactive Publication Date: 2015-01-21
HEBEI UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a recognition method for human face micro-expressions, which is to use the Birnbaum-Saunders distribution curve to establish a regression model after the pre-processing of the human face micro-expression image sequence is completed, and then use the CBP-TOP algorithm to extract the human face. The dynamic spatiotemporal texture features of facial micro-expression sequences are finally trained and predicted using a classifier. This method overcomes the sensitivity of existing facial micro-expression recognition methods to small features such as bright spots, edges and white noise in human facial micro-expression images. Thus identifying defects with low performance

Method used

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Embodiment 1

[0065] The recognition method of micro-expression of human face is a recognition method of micro-expression of human face using CBP-TOP algorithm to extract the dynamic spatio-temporal texture feature of micro-expression sequence, and the specific steps are as follows:

[0066] The first step, face micro-expression image preprocessing:

[0067] Use the Adaboost algorithm to detect and crop the face in the micro-expression image, and use the bilinear difference algorithm to normalize the size of the image. After the pre-processing of the face micro-expression image, the size of the face micro-expression image is 180× 180 pixels; the result of face micro-expression image preprocessing in this step is as above figure 2 Examples are shown.

[0068] The second step is face micro-expression detection:

[0069] Use the Birnbaum-Saunders distribution curve to establish a regression model for marking the micro-expression image sequence of the human face, including the start frame Ap...

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Abstract

The invention discloses a face microexpression recognition method and relates to a method for recognizing graphs with electronic equipment. The method comprises the steps that after a face microexpression image sequence is preprocessed, the Birnbaum-Saunders distribution curve is used for building a regression model, then the CBP-TOP algorithm is used for extracting dynamic space-time texture features of the face microexpression sequence, and finally a classier is used for training and prediction. The defect that an existing face microexpression recognition method is sensitive to small features such as bright points, edges and white noise of a face microexpression image, thereby being low in recognition performance is overcome.

Description

technical field [0001] The technical solution of the present invention relates to a method for recognizing graphics using electronic equipment, in particular to a method for recognizing micro-expressions on human faces. Background technique [0002] Micro-expression is the process of human's internal emotional information processing. It cannot be forged and is not controlled by consciousness. It is an effective clue to identify lies and can be widely used in security, judicial, clinical and other fields. But microexpressions are short-lived and difficult to recognize. Even with a well-trained human, when it comes to microexpression recognition, the accuracy rate is only about 40%. Therefore, it is very necessary to develop a micro-expression recognition system and realize computer automatic recognition of micro-expressions, both for the mechanism research and practical application of micro-expressions. [0003] At present, many teams at home and abroad are conducting micro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/46G06K9/62
CPCG06V40/174G06V40/168G06V40/172
Inventor 郭迎春薛翠红师硕于洋王英资张亚娟阎刚
Owner HEBEI UNIV OF TECH
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