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Three-dimensional virtual human body movement generation method based on key frames and spatiotemporal restrictions

A human body movement and 3D virtual technology, applied in animation production, image data processing, instruments, etc., can solve the problems of losing SVM looseness and robustness, and achieve the effect of reducing the cost of motion design and facilitating modification

Inactive Publication Date: 2012-05-23
上海日浦信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LS-SVM loses the looseness and robustness of SVM. In order to overcome this problem, a weighted least squares support vector machine method (WLS-SVM) is proposed, which is mostly used to solve problems such as pattern recognition and function estimation.

Method used

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  • Three-dimensional virtual human body movement generation method based on key frames and spatiotemporal restrictions
  • Three-dimensional virtual human body movement generation method based on key frames and spatiotemporal restrictions
  • Three-dimensional virtual human body movement generation method based on key frames and spatiotemporal restrictions

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Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: The motion of waving the right hand is used as the motion of the virtual human body to be generated. In this waving movement, the right arm is initially located in the middle, first swings to the left to the minimum movement span, then swings to the right to the maximum movement span, and finally swings back to the left to the middle position to complete the whole swing process.

[0047] The above-mentioned three-dimensional virtual human motion generation method of the present embodiment includes the following steps:

[0048] 1) First, use the multi-rigid body model of the skeletal structure as the geometric model of the three-dimensional virtual human motion control, and determine the joints and the number of degrees of freedom required to control the motion of the geometric model: since the human body has more than 200 degrees of freedom , in order to balance the fidelity and controllability of virtual human motion, this embodiment selects 45 degrees of...

Embodiment 2

[0055] Embodiment 2: Take the jumping motion of the human body as the virtual human motion to be generated. The movement process is: when preparing to jump up, the human body squats slightly, after squatting down slightly, jumps up, lifts off the ground, hangs in the air for a while, lands, squats slightly to buffer, and finally stands upright on the ground to complete the whole process. Jump up exercise.

[0056] The above-mentioned three-dimensional virtual human motion generation method of the present embodiment includes the following steps:

[0057] 1) First, use the multi-rigid body model of the skeletal structure as the geometric model of the three-dimensional virtual human motion control, and determine the joints and the number of degrees of freedom to control the movement of the geometric model; 18 main joints of human body movement and their 45 degrees of freedom, including angle parameters of 42 degrees of freedom and position parameters of 3 degrees of freedom;

...

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Abstract

The invention relates to a three-dimensional virtual human body movement generation method based on key frames and spatiotemporal restrictions, belonging to the technical field of computer three-dimensional animations. The method comprises the steps of using a multi-rigid-body model with a skeleton structure as a geometrical model for three-dimensional virtual human body movement control, wherein vectors formed by all determined angle parameters indicating freedom in the geometrical model are taken as parameters for virtual human body static posture formal description; making human body static postures at two key frame moment, i.e. a minimum movement span and a maximum movement span; conducting equal or non-equal time sampling to the time sequence of movement, determining the angle offset of each time sampling point and obtaining the angle parameters of time sampling points in a movement process to be generated; and then generating virtual human body static postures at the moment, determining position parameters and generating the full movement process of a virtual human body in a three-dimensional space. By adopting the method, special video capture equipment is not required, the simplicity in making three-dimensional human body animations is improved and the method has the characteristics of convenience, high efficiency and high flexibility.

Description

technical field [0001] The invention belongs to the technical field of computer three-dimensional animation, and in particular relates to three-dimensional human motion generation technology. Background technique [0002] In 3D computer animation, human body animation is one of the most difficult and challenging research topics. Similarly, the motion generation and control of virtual human is also an important research direction of virtual human technology. However, since the human body has more than 200 degrees of freedom, the movements of different individuals have different action characteristics and emotional characteristics. At the same time, the generation of virtual human motion must conform to the basic laws of human motion and have a simple and controllable operation mode, which needs to satisfy both the fidelity of motion and the effectiveness of control. Therefore, the generation of three-dimensional virtual human motion, including design, production and control...

Claims

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Application Information

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IPC IPC(8): G06T13/40
Inventor 严峰
Owner 上海日浦信息技术有限公司
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