Skeleton extraction method of human body point cloud model

A point cloud model, skeleton extraction technology, applied in the field of interdisciplinary

Active Publication Date: 2017-11-07
XIAN UNIV OF TECH
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Problems solved by technology

[0009] The purpose of the present invention is to provide a skeleton extraction method of a human body point cloud model, which solves the problem that the existing technology is only applicable to a spec

Method used

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  • Skeleton extraction method of human body point cloud model
  • Skeleton extraction method of human body point cloud model
  • Skeleton extraction method of human body point cloud model

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[0076] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0077] The skeleton extraction method of a human point cloud model of the present invention is specifically implemented according to the following steps:

[0078] Step 1: Based on the slicing idea, obtain the skeleton points of the human body model, connect the skeleton points, and generate the initial curve skeleton of the model;

[0079] Among them, obtaining the skeleton point of the human body model is specifically:

[0080] Step 1.1: Find the trend of the human point cloud model, specifically:

[0081] Given a human point cloud model containing n points, set a point in the point cloud as p, then p and The resulting covariance matrix M is:

[0082]

[0083] among them, Point p i The average position of k neighboring points, namely:

[0084]

[0085] Find the three spatial feature vectors λ of the model according to M 1 , Λ 2 And λ 3 , Compare λ 1 , Λ 2 And λ 3 Us...

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Abstract

The invention discloses a skeleton extraction method of a human body point cloud model. The skeleton extraction method is characterized by being implemented according to the following steps: a first step of obtaining skeleton points of a human body model based on a slice idea, connecting skeleton points, and generating a model initial curve skeleton; a second step of roughly optimizing the initial curve skeleton, and removing extra bifurcation points and internal branches caused by noise points or holes; and a third step of performing refined optimization on the model curve skeleton by inserting interpolation points on a skeleton line to be optimized to obtain final skeleton information. The skeleton extraction method of the human body point cloud model according to the invention solves the problems that the prior art is only applicable to a specific model or an ideal state is hard to achieve for all properties of the skeleton model curve, and can automatically complete the skeleton extraction of the human body point cloud model.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of combining computer graphics and virtual reality, and in particular relates to a skeleton extraction method of a point cloud model of a human body. Background technique [0002] The skeleton information of a 3D model is a powerful shape descriptor that can describe the topology and key shape features of an object. Therefore, the skeleton extraction of a 3D object is an important research hotspot in the field of computer graphics. It is used in pattern recognition, image retrieval and It has a wide range of applications in virtual sports, medical imaging, animation, object deformation research and other fields. [0003] The basic methods for 3D model skeleton extraction emerge in endlessly, and many new algorithms continue to emerge. Generally speaking, since the point cloud model does not contain explicit topological connection information, and some data may be missing, the extraction of...

Claims

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Application Information

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IPC IPC(8): G06T7/12G06K9/46G06K9/44
CPCG06T7/12G06T2207/30196G06T2207/10028G06V10/34G06V10/457
Inventor 宁小娟王映辉郝雯徐乐赵明华吕志勇石争浩
Owner XIAN UNIV OF TECH
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