Calibration and linkage method of master-slave camera system based on rotation model

A camera, fisheye camera technology, applied in image analysis, image data processing, instruments, etc., can solve the problems of inaccurate mapping relationship, uncertain position relationship between fisheye camera and PTZ camera, installation error, etc.

Active Publication Date: 2016-05-11
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0005] Since the positional relationship between the fisheye camera and the PTZ camera is uncertain, even if there is a relatively definite relationship, due to errors in installation and other aspects, the required mapping relationship cannot be precise and clear, so the calibration is the master-slave camera necessary steps of the system
The more intuitive way to achieve calibration is to manually calibrate block by block, that is, to divide a lot of blocks in the fisheye image, manually rotate the PTZ camera, and record the rotation parameters of the PTZ camera corresponding to each block, and finally use the interpolation method to find the values ​​of all positions. Mapping relationship, this method has the disadvantage of time-consuming and labor-intensive operations

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  • Calibration and linkage method of master-slave camera system based on rotation model
  • Calibration and linkage method of master-slave camera system based on rotation model
  • Calibration and linkage method of master-slave camera system based on rotation model

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Embodiment Construction

[0047] A preferred embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples.

[0048] figure 1 It is a master-slave camera system. In the figure, 1 is a fisheye camera, which is located at the top, and is used to collect images in a global range, and 2 is a PTZ camera, which is located at the bottom, and is used to collect high-definition images in a local range.

[0049] In order to realize the precise linkage between the fisheye camera and the PTZ camera, the technical solution adopted by the present invention includes two aspects: a calibration process and a linkage process.

[0050] The calibration process refers to the process of obtaining the mapping relationship, including the following four steps:

[0051] The first step in the calibration process: initial adjustments. Adjust the lens zoom of the PTZ camera to 0 times (that is, the maximum field of view), and use the combination of manual...

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Abstract

The invention discloses a calibration and linkage method for a primary camera system and a secondary camera system on the basis of a rotary model. The calibration and linkage method comprises a calibration process and a linkage process. The calibration process is a process of acquiring a mapping relation; after the calibration process is finished, the linkage process is started; and the linkage process is a process of implementing precise linkage of a fisheye camera and a PTZ (pan / tilt / zoom) on the basis of the mapping relation. By the method, the calibration process can be finished automatically to obtain the required mapping relation. The calibration and linkage method plays an important role in improvement of the practicality of the primary camera system and the secondary camera system.

Description

technical field [0001] The invention relates to a calibration method of a camera system, in particular to a calibration and linkage method of a master-slave camera system based on a rotation model, and belongs to the field of image information processing. Background technique [0002] In recent years, with the development of video surveillance technology, the market demand for fisheye camera surveillance equipment is increasing. Surveillance cameras based on fisheye lenses can generate panoramic video images containing all-round scene information, and can realize the acquisition of large-field and wide-view scene images, which has very important application value in the field of security monitoring. However, the local resolution of the fisheye camera is very low, so its practical value is limited to a certain extent. [0003] The master-slave camera system is a new type of monitoring system, generally composed of a fisheye camera and a PTZ (pan-tilt-zoom) camera. The PTZ ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00
Inventor 赖世铭王炜张政刘煜张茂军
Owner NAT UNIV OF DEFENSE TECH
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