Measurement method of plane mirror included angle in multiplane-mirror catadioptric system

A catadioptric and multi-plane technology, which is applied in the field of angle measurement of plane mirrors, can solve problems such as difficulty in measuring angles between plane mirrors, and achieve the effect of improving accuracy, system stability and precision

Inactive Publication Date: 2011-10-26
PEKING UNIV
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Problems solved by technology

[0005] The present invention aims to solve the problem of difficulty in measuring the angle between plane mirrors caused by the use of multiple plane mirrors in the traditional multi-plane mirror

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  • Measurement method of plane mirror included angle in multiplane-mirror catadioptric system
  • Measurement method of plane mirror included angle in multiplane-mirror catadioptric system
  • Measurement method of plane mirror included angle in multiplane-mirror catadioptric system

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Embodiment Construction

[0029] In order to better understand the technical solution of the present invention, further detailed description will be given below in conjunction with the accompanying drawings.

[0030] Depend on figure 1 From the system flow chart, it can be seen that the entire processing process of the system consists of four stages: data preprocessing, acquisition of identification points, calculation of ring points and poles, and final acquisition of mirror angles.

[0031] 1. Data preprocessing

[0032] This phase includes the acquisition of image data— figure 2 For the data samples, the calibration of the internal and external parameters of the monocular camera, and the background modeling to ensure the real-time performance of the system.

[0033] Since the hardware acquisition system of the present invention is composed of a monocular camera and a multi-plane mirror, it is not necessary to consider the problem of synchronous control and acquisition of images involved in the ca...

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Abstract

The invention provides a measurement method of a plane mirror included angle in a multiplane-mirror catadioptric system. Technical schemes of the invention comprise the following steps: by using the multiplane mirrors and a monocular camera, establishing a data acquisition system, calibrating a shooting angle and a diaphragm of a real camera and collecting data of an object in a shooting area; acquiring marking points through adopting a threshold method; acquiring center positions of the marking points by using an area gap filling method; elliptically fitting the obtained marking points; calculating the position of circle points by using an ellipse; calculating pole positions by using a limit-restraint technology; finally acquiring the plane mirror included angle by using the poles and the circle points. In the traditional multiplane-mirror catadioptric system, the plane mirror included angle is difficult to be measured because of utilization of a plurality of plane mirrors. By using the method of the invention, the above problem can be solved, calibration precision of the monocular camera can be raised so that accuracy of three-dimensional scene reconstruction and stability of system can be improved.

Description

technical field [0001] The invention relates to a novel catadioptric imaging system, in particular to a method for measuring the included angle of a plane mirror of an uncalibrated multi-plane mirror catadioptric system. Background technique [0002] With the development and application of computer vision and photogrammetry, the measurement of scenes based on computer vision methods has attracted the attention and interest of many scholars. This method has many advantages: (1). The measurement process is convenient and the measurement results are objective; (2). The required hardware equipment is simple and low in cost; (3). Back to the original actual scene. [0003] One of the most typical measurement methods based on computer vision is to use stereo vision to reconstruct the three-dimensional structure of the scene by unifying two or more images of the scene, so as to measure the distance between any bright spots in the three-dimensional space. However, in the process o...

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Application Information

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IPC IPC(8): G01B11/26
Inventor 英向华彭琨任仁别怀伟杨李侯璐璐孔菁查红彬
Owner PEKING UNIV
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