High-precision motion platform-based multi-camera calibration method

A motion platform and calibration method technology, applied in the field of multi-camera systems, can solve the problems of difficult design of calibration objects, lack of universality, low parameter accuracy, etc., achieve high-precision measurement and automatic control capabilities, improve work efficiency, and achieve accurate calibration results Effect

Active Publication Date: 2016-11-09
XI AN JIAOTONG UNIV
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Problems solved by technology

However, in actual use, the design of calibration objects is difficult and not universal, and the practicability is poor and the accuracy

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  • High-precision motion platform-based multi-camera calibration method
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  • High-precision motion platform-based multi-camera calibration method

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Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0041] Multi-camera systems typically require cameras or cameras to capture objects from multiple angles. When the images of the object or person to be reconstructed are viewed from different angles at the same time, the 3D information of the object or person to be reconstructed can be calculated by using the calibration results of the multi-camera system to achieve goals such as motion capture. Therefore calibration is the most basic and important step of the system. The camera layout structure of the present invention can adopt a general multi-camera system structure, and there is no special requirement for the installation position and posture of the multi-camera; figure 1 As shown, the layout diagram of the multi-camera system calibration system in this preferred example, the moving rang...

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Abstract

The invention discloses a high-precision motion platform-based multi-camera calibration method. In a whole working region, a calibration plate fixed to a high-precision motion platform through an objective table can make any known linear motion of rotation, translation and the like, and a pose of the calibration plate in a world coordinate system is obtained. The calibration plate moves under the control of the high-precision motion platform to appear in sight of one or more cameras, the cameras shoot images, coordinates of corresponding points in the world coordinate system and an image coordinate system are searched for, and finally parameters of all the cameras are solved once by adopting a global optimization algorithm, so that the shortcoming of low efficiency, relatively large accumulative error, trouble of designing a specific calibration part or the like due to one-by-one calibration of cameras in a multi-camera system in an existing calibration method is overcome, one-time calibration of the whole multi-camera system is realized, the method has greatly important engineering application values, and high-precision calibration and three-dimensional reconstruction are finished. A measurement process is simple, a calibration result is accurate, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a multi-camera system in the field of computer vision, in particular to a multi-camera calibration method based on a high-precision motion platform. Background technique [0002] Multi-camera systems are quite common in the field of computer vision. For example, in applications such as 3D reconstruction, motion capture, and multi-viewpoint video, a multi-camera system composed of various cameras, light sources, and storage devices is often required. Multi-camera system calibration, that is, determining the internal and external parameters of each camera, is an indispensable and important step for a multi-camera system to work reliably and efficiently. [0003] In the past, two methods were generally used for multi-camera system calibration: (1) Traditional calibration methods were used, but these calibration objects were self-occluded and could not be observed from multiple viewing angles at the same time, so it was impossible ...

Claims

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Application Information

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IPC IPC(8): G06T7/00
CPCG06T2207/30244
Inventor 王飞颜峰张观洲郑南宁
Owner XI AN JIAOTONG UNIV
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