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Rigid body motion capturing method and system based on mark point

A technology of rigid body motion and marker points, applied in image data processing, instruments, calculations, etc., can solve the problems of lack of calculation of motion degrees of freedom, low accuracy of motion capture, and weak real-time performance, and achieve strong automatic recognition and error correction capabilities , Response to a wide range of wavelengths, and improve the effect of practicality

Inactive Publication Date: 2017-04-26
CHENGDU TOPPLUSVISION TECH CO LTD
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AI Technical Summary

Problems solved by technology

The invention solves the problems of low real-time performance of the traditional rigid body motion capture method, low motion capture accuracy and lack of calculation of motion degrees of freedom commonly found in unmarked motion capture, and improves the accuracy of motion capture

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  • Rigid body motion capturing method and system based on mark point
  • Rigid body motion capturing method and system based on mark point
  • Rigid body motion capturing method and system based on mark point

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specific Embodiment approach

[0061] On the basis of the above-mentioned embodiments, another specific implementation of a landmark-based rigid body motion capture method provided by the present invention includes the following steps:

[0062] Step S201: Calibrate the camera network to obtain calibration parameters;

[0063] Steps S202-S205 are implemented in the same manner as S101-S104 in the previous embodiment.

[0064] Specifically, the previous embodiment uses a calibrated camera network, but in this embodiment, the cameras need to be calibrated first.

[0065] Preferably, a two-by-two calibration method can be used to calibrate the cameras. Taking a camera network composed of four cameras as an example, the camera numbers are 1, 2, 3, and 4 in sequence, then the specific steps of calibration are as follows:

[0066] A. The internal parameter matrix of the calibrated camera is M 1 ,M 2 ,M 3 ,M 4 .

[0067] B. Calibrate the rotation-translation relationship R1, T1 between camera 1 and camera 2;...

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Abstract

The invention discloses a rigid body motion capturing method based on a mark point, and the method is used for calculating the position and posture of a rigid body in a measurement scene, controlling the motion of the rigid body, and obtaining the track of the rigid body. The method comprises the steps: firstly carrying out the collection of a two-dimensional image sequence of the rigid body and the detection of the mark point, and secondly achieving the three-dimensional measurement and posture resolving of the mark point. The method solves problems that a conventional rigid body motion capturing method is not high in instantaneity, is usually low in motion capturing precision when there is no mark motion, and causes the motion freedom calculation loss. The method improves the motion capturing precision. Meanwhile, the invention also discloses a rigid motion capturing system based on the mark point.

Description

technical field [0001] The invention relates to the fields of computer vision, space photogrammetry technology and motion capture, in particular to a marker point-based rigid body motion capture method. Background technique [0002] A motion capture system is a system that measures the motion of an object, such as velocity, acceleration, and position. In principle, it can be divided into mechanical, acoustic, electromagnetic, active optical and passive optical. Devices with different principles have their own advantages and disadvantages, which can generally be evaluated from the following aspects: positioning accuracy, real-time performance, ease of use, range of motion that can be captured, anti-interference, multi-target capture capabilities, and professional analysis in corresponding fields Software connectivity. [0003] From a technical point of view, the essence of motion capture is to measure, track, and record the trajectory of objects in three-dimensional space. ...

Claims

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Application Information

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IPC IPC(8): G06T7/246G06T7/20
CPCG06T2207/10016
Inventor 周剑罗军王时丽张小苗
Owner CHENGDU TOPPLUSVISION TECH CO LTD
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