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Three-dimensional face recognition method based on face contour lines of semi-rigid areas

A technology of 3D face and recognition method, which is applied in the field of 3D face recognition, and can solve problems such as being easily affected by expression changes

Inactive Publication Date: 2015-05-06
SOUTHEAST UNIV
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Problems solved by technology

[0003] Compared with two-dimensional face recognition, although three-dimensional face has great advantages, but because the three-dimensional shape of the face is very susceptible to the influence of expression changes, overcoming the influence of expression changes is one of the difficult problems in the research of three-dimensional face recognition.

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  • Three-dimensional face recognition method based on face contour lines of semi-rigid areas
  • Three-dimensional face recognition method based on face contour lines of semi-rigid areas
  • Three-dimensional face recognition method based on face contour lines of semi-rigid areas

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Embodiment Construction

[0054] Referring to the accompanying drawings in the specification, the specific embodiments of the present invention will be further described below.

[0055] The three-dimensional face recognition method based on the facial outline in a semi-rigid area of ​​the present invention realizes the three-dimensional face recognition process through the Matlab R2013a programming tool in the Windows operating system. The experimental data comes from the FRGC v2.0 3D face database, which contains 4007 face models of 466 individuals for testing. figure 1 It is an overall flow chart of the inventive method, and the concrete steps are as follows:

[0056] Step 1: Extract the face area of ​​interest from the input 3D face point cloud, which is the face area contained in a sphere with the tip of the nose as the center and a radius of 90mm;

[0057] Step 2: Carry out meshing operation on the 3D face point cloud extracted in step 1, use a grid-based smoothing algorithm to smooth and denoise...

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Abstract

Disclosed is a three-dimensional face recognition method based on face contour lines of semi-rigid areas. The method comprises steps of (1) preprocessing three-dimensional face models, including face area segmentation, smoothing and pose normalization, and placing all faces under a pose coordinate system; (2) extracting multiple vertical contour lines of the faces from the semi-rigid areas of the three-dimensional models to represent the facial curved surfaces of the faces; (3) utilizing an elastic curve matching algorithm to compute the geodesic distances among the corresponding contour lines of different three-dimensional face models in a pre-shape space, taking the geodesic distances as similarity measures, weight-fusing the similarity vectors of all the contour lines to obtain a total similarity for recognition. The three-dimensional face recognition method based on the face contour lines of the semi-rigid areas has high recognition performance, achieves high robustness on change in expression and increases the face matching speed.

Description

technical field [0001] The invention relates to a three-dimensional face recognition method based on facial contour lines in a semi-rigid region, in particular to a face recognition method using face curves for recognition, and is especially suitable for occasions where expressions vary greatly. Background technique [0002] Compared with biometric identification technologies such as iris recognition and fingerprint recognition, face recognition has the advantages of naturalness, non-compulsion, and non-contact. Broad application prospects. Traditional two-dimensional face recognition is mainly based on grayscale or color images, which can achieve good recognition performance in a constrained environment, but it is still affected by factors such as illumination, posture, and expression, which greatly limits the ability of two-dimensional human faces. The development of face recognition. Three-dimensional face recognition is mainly based on the three-dimensional shape infor...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/46
CPCG06V40/165G06V40/171G06V10/44
Inventor 达飞鹏常朋朋刘俊权吕士文邓星李燕春梅俊
Owner SOUTHEAST UNIV
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