Face symmetry plane obtaining method based on iterative mirroring and registration

A symmetrical plane and iterative technology, applied in the field of computer vision, can solve the problems of low precision and large storage requirements in obtaining the symmetrical plane, and achieve the effect of avoiding local asymmetry and accurate symmetrical plane

Active Publication Date: 2017-09-05
YANGZHOU UNIV
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AI Technical Summary

Benefits of technology

This patented technology proposes an improved way to create a unique surface that accurately describes how two objects look alike without any differences or distortions from each other's perspective. By repeating this technique over multiple times with different orientations, we get even better accuracy compared to previous methods like rasterizing.

Problems solved by technology

Technologies described earlier include methods used to determine whether there're any differences between normal parts of human skin called asymmetric shaping. These techniques involve analyzing images from patients undergoing mastopexy procedures such as cheek replacement surgeries where they had partially corrected their appearance. They also discuss various mathematical models developed over time to approximate these changes accurately. Additionally, several technical features discussed in this patents aim at developing a more efficient way to correct errors made about imperfections in teeth reconstructive surgery or dentistry.

Method used

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  • Face symmetry plane obtaining method based on iterative mirroring and registration
  • Face symmetry plane obtaining method based on iterative mirroring and registration
  • Face symmetry plane obtaining method based on iterative mirroring and registration

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Embodiment Construction

[0046] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0047] A method for obtaining face symmetry plane based on iterative mirroring and registration, including the following steps:

[0048] 1) 3D scan to obtain face data

[0049] For collecting 3D face data, a method based on 3D scanner is used to obtain more accurate face shape and texture information, and then the point cloud is smoothly scanned by Gaussian filter to reduce outliers and large noises, and the acquired point cloud data is triangulated 化.

[0050] 2) Detect the line of symmetry and estimate the plane of symmetry initially

[0051] (1) The longitudinal axis is roughly detected by the PCA of a group of points on the front side of the face point cloud plane, and the direction of the longitudinal axis is the main inertial axis direction associated with the lower moment of inertia in the selected aggregation point.

[0052] (2) Use a set of pl

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Abstract

The invention provides a face symmetry plane obtaining method based on iterative mirroring and registration, and belongs to the field of computer vision. The face symmetry plane obtaining method comprises the following steps that (1) face data are acquired through 3D scanning, and a point cloud is smoothly scanned by a Gaussian filter; (2) the longitudinal axis is roughly estimated through PCA, the face is axially segmented to acquire slice contour, and the most symmetrical points are determined and the symmetry plane is solved; and (3) a new point cloud is generated by the symmetry plane point cloud, the point cloud and mirroring data are registered through ICP and registration iteration is performed and the symmetry plane is solved. The novel face symmetry plane obtaining method is put forward on the basis of the iterative mirroring and registration method so that the influence of the local asymmetry of the symmetrical object and the asymmetry caused in the scanning process can be effectively avoided and the obtained symmetry plane is enabled to be more accurate.

Description

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Claims

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Application Information

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Owner YANGZHOU UNIV
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