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Multi-camera calibration method based on the principle of minimum optical path and transparent glass calibration plate

A technology of transparent glass and calibration method, which is applied in image data processing, image analysis, instruments, etc., can solve the problems of difficult control of manufacturing precision, inaccurate alignment of calibration patterns on both sides, and affect the accuracy of calibration results, etc., to achieve simplification and optimization Parameter process, improving accuracy, effect of improving measurement accuracy

Active Publication Date: 2022-02-11
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The special calibration plate needs precision manufacturing, but there is a problem that the calibration patterns on both sides cannot be precisely aligned, which makes the manufacturing accuracy difficult to control, which will affect the accuracy of the calibration results

Method used

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  • Multi-camera calibration method based on the principle of minimum optical path and transparent glass calibration plate
  • Multi-camera calibration method based on the principle of minimum optical path and transparent glass calibration plate
  • Multi-camera calibration method based on the principle of minimum optical path and transparent glass calibration plate

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Embodiment Construction

[0044] 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.

[0045] The technical scheme that the present invention solves the problems of the technologies described above is:

[0046] Such as figure 1Shown is a schematic diagram of multi-camera calibration based on a transparent glass calibration plate. Without loss of generality, this patent uses a 4-camera system to verify a multi-camera calibration method based on the minimum optical path principle and a transparent glass calibration plate proposed by the present invention. Such as figure 1 As shown, the multi-camera calibration system includes: a transparent glass calibration plate with a calibration pattern printed on only one side; 4 cameras with the same parameters, two cameras are distributed in front of ...

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Abstract

The invention claims a multi-camera calibration method based on the minimum optical path principle and a transparent glass calibration plate, which is used in the fields of visual inspection and image measurement. This method uses a transparent glass plate to complete the multi-camera calibration. The whole multi-camera calibration process includes: the first stage, carefully adjust the field of view of the camera to meet the requirements of the same coverage area between the two cameras; the second stage, use Zhang Zhengyou to calibrate The method obtains the internal parameters of the camera; in the third stage, the external parameters of the front and rear cameras of the calibration plate are obtained by using the pinhole imaging model and the refraction projection model respectively; in the fourth stage, the external parameters of each camera are unified into the same coordinate system. Compared with the prior art, the present invention adopts a multi-camera calibration method based on the minimum optical path and a transparent glass calibration plate to simultaneously complete calibration of multiple cameras in the system, thereby improving accuracy and reliability.

Description

technical field [0001] The invention belongs to the field of visual detection and image measurement, and in particular relates to a multi-camera calibration method used in a multi-camera measurement system. Background technique [0002] Typically, the measurement of size, shape and deformation is a dynamic process. Since the method of using multiple cameras to simultaneously capture the surface of an object from different perspectives (one image acquisition) and dynamically reconstruct the shape of the entire object has many application scenarios in the fields of visual inspection and image measurement, this method has been extensively studied. In precision measurement, the calibration of multi-camera systems has always been a key step in multi-camera applications. Researchers have proposed many different methods and applied them to different fields. Xu et al. [1] proposed a new calibration method for internal and external parameters of a multi-camera network by using plan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/80
CPCG06T7/80
Inventor 吴高峰冯明驰冯辉宗罗延陈杰岑明
Owner CHONGQING UNIV OF POSTS & TELECOMM
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