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Multi-camera measurement method based on refractive projection model and beam tracking method

A measurement method and multi-camera technology, applied to the interpretation of photos, etc., can solve the problems of inaccurate calibration results, high requirements for the manufacturing process of calibration objects, and cumbersome operation processes

Active Publication Date: 2019-02-15
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

At present, for the calibration of multi-camera systems, there are mainly problems such as cumbersome operation process, inaccurate calibration results, and high requirements for the manufacturing process of calibration objects.

Method used

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  • Multi-camera measurement method based on refractive projection model and beam tracking method
  • Multi-camera measurement method based on refractive projection model and beam tracking method
  • Multi-camera measurement method based on refractive projection model and beam tracking method

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Embodiment Construction

[0066] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0067] The technical scheme that the present invention solves the problems of the technologies described above is:

[0068] like figure 1 Shown is a schematic diagram of a multi-camera measurement system. Without loss of generality, the present invention adopts a four-camera measurement system to verify a multi-camera measurement system based on a refraction projection model and beam tracing method proposed by the present invention. like figure 1 As shown, the multi-camera measurement system includes: 4 cameras are divided into two groups, and the two cameras in group I include camera Cam1 and camera Cam2, which are located on one side of the measurement target. The two cameras in group II include camer...

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Abstract

The invention discloses a multi-camera measurement method based on a refractive projection model and a beam tracking method, and used for the field of visual detection and image measurement. The process of the present invention comprises the following steps of: building a multi-camera system; global calibrating by multi-camera based on the refractive projection model and the beam tracking method;respectively capturing images from different directions by a plurality of cameras; extracting and matching features to obtain measured three-dimensional points; converting the three-dimensional pointsobtained by each subsystem into the same coordinate system to obtain global measured data; and using the obtained three-dimensional point data to calculate an indirect amount (e.g., strain, displacement). The key of the present invention is the calibration of the multi-camera system, the result will affect the subsequent three-dimensional point acquisition. According to the multi-camera measurement method based on the refractive projection model and the beam tracking method, the features in the measurement process are that the multiple cameras in the system can be calibrated at the same timeto solve the problem that a planar calibration plate limits the distribution of multiple cameras, and the measurement process is flexible.

Description

technical field [0001] The invention belongs to the field of visual detection and image measurement, and in particular relates to a multi-camera measurement system for global measurement. Background technique [0002] Visual measurement has been a research hotspot in the field of computer vision in recent years. It is widely used in military, industrial and civil fields, and has high theoretical research and practical application value. The single-camera system can only obtain two-dimensional information, which limits the measurement of multi-plane targets. The binocular camera system has simple structure, low cost and high precision, but it can only collect the target object at a fixed angle, and obtain the target object’s image. Three-dimensional information, and the target object has problems such as different sizes and complex shapes that cause self-occlusion, so it cannot be accurately measured. The multi-camera system can not only obtain the multi-plane information of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/10
CPCG01C11/10
Inventor 冯明驰姜盼盼王剑桥肖立峰陈国喜郑太雄
Owner CHONGQING UNIV OF POSTS & TELECOMM
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