Three-dimensional mannequin joint center extraction method

A human body model and extraction method technology, applied in 3D modeling, image data processing, instruments, etc., can solve the problem of low extraction accuracy

Inactive Publication Date: 2008-09-24
北京宗元科技有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defect that the existing joint center extraction method has low extraction accuracy and can only deal with three-dimensional human body models with marked poses, thereby providing a joint center extraction method with high accuracy and wide application range

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0039] Such as figure 1 As shown, the three-dimensional human body model joint center extraction method of the present invention comprises the following steps:

[0040] Step 10, input the surface grid information of the 3D human body model, and extract the terminal feature points of the 3D human body model according to the information.

[0041] In this embodiment, one implementation method for calculating the end feature points of the three-dimensional human body model is a geodesic distance calculation method. Among them, a geodesic is the shortest line between two points on any surface. The geodesic distance is the length of the line connecting the two points. In the prior art, the geodesic distance calculation method is implemented by finding the sum of geodesic distances from points on the surface of the human body model to other points, ...

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Abstract

The invention discloses a joint center extracting method of a three-dimensional human model , comprising the following steps: the surface grid information of the three-dimensional human model is imported, by which a characteristic point of a tail-end of the three-dimensional human model is extracted; on the basis of the characteristic point of the tail-end, the limbs of the three-dimensional human model are divided; and an approximate direction of each limb in the three-dimensional human model is computed; a group of parallel planes perpendicular to the approximate direction of the limb is used for intercepting the three-dimensional human model to get a sectional profile group; a circularity function of the sectional profile group is computed to get a group of circularity function sequences; a local minimum of the circularity function sequence is computed, by which a deformed profile in the profile group is determined; a profile center of gravity of the deformed profile is computed and taken as the joint center of a relevant position of the three-dimensional human model. The joint center extracting method provided by the invention can be used in the three-dimensional human model with an arbitrary posture, of which the extraction precision of the joint center is comparatively high.

Description

technical field [0001] The invention relates to the creation of a three-dimensional human body model, in particular to a method for extracting a joint center of a three-dimensional human body model. Background technique [0002] With the development of non-contact measurement technology, the surface information of objects can be easily obtained by 3D scanners. The 3D human body model based on this scanning technology can truly reproduce the personalized information of the human body shape, and is an accurate and reliable geometric representation method of virtual human. Although this representation method can provide a large amount of human body shape information, it does not have any human body semantic information, such as the joint center of the human body, which brings great obstacles to subsequent use. [0003] At present, many researchers have carried out extensive research on the extraction of joint centers of 3D scanned human models. The extraction methods are mainl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06T7/60
Inventor 毛天露于勇夏时洪王兆其
Owner 北京宗元科技有限公司
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