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Novel linear structured light visual system and scaling method

A line-structured light and vision system technology, applied in the field of laser vision, can solve problems such as unintuitive projection geometry, large error in calibration results, inconvenient solution, etc., to save tediousness and error accumulation, easy to implement, and improve solution The effect of precision

Inactive Publication Date: 2018-12-11
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

These methods only use limited control points on the light strip line as the fitting elements of the laser plane, and the geometric properties of the projection used are not intuitive. Not only the calculation is large, the solution is inconvenient, but the error of the calibration result may be large.
It can be seen that there is still a lot of room for improvement in the calibration method of the laser plane

Method used

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  • Novel linear structured light visual system and scaling method
  • Novel linear structured light visual system and scaling method
  • Novel linear structured light visual system and scaling method

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Embodiment

[0035] like figure 1 and figure 2 As shown, a new type of line structured light vision system, the target plane in the following is the target plane, and the photosensitive plane is the photosensitive imaging plane of the CCD camera chip, including the laser transmitter 2, the guide rail 4, the camera 3 and the calibration plate 1. The calibration board 1 is in front of the laser transmitter, the calibration board is within the field of view of the camera, and the camera moves on the guide rail. like Figure 4 As shown, the calibration plate in this embodiment is a checkerboard grid, and the line-structured light emitted by the laser emitter is located on the target plane of the calibration plate.

[0036] The calibration method of this system includes two parts: camera calibration and laser plane calibration. The camera calibration adopts Zhang Zhengyou's calibration method, and the laser plane calibration uses the calibration plate to complete the laser plane calibration ...

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Abstract

The invention discloses a novel linear structured light visual system and a scaling method. The system comprises a laser emitter, a camera and a scaling board. Linear structured light is irradiated onthe scaling board, a camera collects sufficient scaling images including a target, a target plane method of a laser reflection plane is obtained by calculation, a three-side collinear condition is used to solve an equation expression of the laser plane, and the laser plane is scaled. The method is simple and easy to implement, and has a higher engineering application value.

Description

technical field [0001] The invention relates to the field of laser vision, in particular to a novel line structured light vision system and a calibration method. Background technique [0002] Laser vision is an emerging machine vision inspection method in recent years. Laser vision system refers to the combination of laser and industrial camera, laser is shot on the surface of the object to be tested, and the light spot on the surface is photographed by the camera and corresponding image processing is performed to obtain the three-dimensional object. A type of information system. This type of system combines the advantages of camera non-contact measurement, rich global information, good laser monochromaticity, high brightness collimation, clear spot pattern, and strong anti-interference ability. It is becoming more and more popular in the field of industrial production inspection. its huge potential. [0003] Among them, the line structured light (which is formed by splitt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25
CPCG01B11/25G01B21/042
Inventor 肖骏邱志成
Owner SOUTH CHINA UNIV OF TECH
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