Fast three-dimensional face recognition method for reducing expression influence

A technology of three-dimensional face and recognition method, applied in the field of three-dimensional face recognition

Inactive Publication Date: 2008-12-03
NANTONG WANGZI HOUSEHOLD ARTICLES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing technologies are still unable to achieve fast and acc

Method used

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  • Fast three-dimensional face recognition method for reducing expression influence
  • Fast three-dimensional face recognition method for reducing expression influence
  • Fast three-dimensional face recognition method for reducing expression influence

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Embodiment Construction

[0037] Below with reference to accompanying drawing of description, the specific embodiment of the present invention is described in more detail:

[0038] 1. Extraction of side contour lines of 3D face model

[0039] The side contour extraction is completed in three steps. First, determine the main axis coordinate system of the face, then detect the nose point and inner eye corner point, and finally determine the face symmetry plane according to the feature points to extract the side contour line.

[0040] (1) Determine the face axis coordinate system

[0041] The face axis coordinate system refers to the coordinate system composed of the three axes of the three-dimensional face data. The three axes correspond to the orientation axis (z axis) of the face and the axis perpendicular to the orientation axis on the face symmetry plane (y axis). axis), and the axis (x-axis) perpendicular to the symmetry plane, the three axes conform to the right-handed coordinate system. In this c...

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Abstract

The invention relates to a method for rapidly identifying a three-dimension face, which takes side contour line matching as exclusion algorithm, carries out exact matching by utilizing the rigid area of the face and reduces expression influence; the method comprises the steps that: firstly, characteristic points such as the tip of the nose and the inner canthus of a three-dimension face model are extracted, the symmetric face of the face is determined according to the characteristic points, and the side contour line is formed by the crossing of the symmetric face of the face and the point cloud of the three-dimension face. The valuable side contour line is intercepted in the side contour line of the tested face model, the valuable side contour line of the tested face model is matched with the side contour line of the face model in a stored collection, which is used for matching, by utilizing the iterative closest point algorithm, and part dissimilar models in the stored collection are excluded according to matching results. Then, the first rigid area and the second rigid area of the tested face are extracted and respectively matched with the remaining models of the stored collection, the matching adopts the improved iterative closest point algorithm based on projection and neighborhood searching, and the marching results are blended by adopting an addition rule. Finally, the identification result is obtained by a nearest neighbor classifier.

Description

technical field [0001] The invention relates to a three-dimensional face recognition method, in particular to a fast three-dimensional face recognition method which uses side contour line matching as an exclusion algorithm and utilizes the rigid area of ​​the face for precise matching and reduces the influence of expressions. Background technique [0002] Automatic face recognition technology has broad application prospects in the fields of national security, military security, public safety, and home entertainment. In the past few decades, face recognition has been extensively studied. However, image-based 2D face recognition technology still faces great challenges, and the accuracy of 2D face recognition is far from satisfactory under the condition of changing light, posture and expression. [0003] Three-dimensional face recognition technology is expected to fundamentally solve the problem of "affected by posture, light and expression" faced by image-based face recognitio...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/64
Inventor 达飞鹏李晓莉
Owner NANTONG WANGZI HOUSEHOLD ARTICLES
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