Full automatic calibration method of master-slave camera chain

A calibration method and camera technology, applied in the field of image processing, can solve the problems of time-consuming and inconvenient large-scale application

Inactive Publication Date: 2010-08-04
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology also requires manual adjustment of dynamic camera param

Method used

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  • Full automatic calibration method of master-slave camera chain
  • Full automatic calibration method of master-slave camera chain
  • Full automatic calibration method of master-slave camera chain

Examples

Experimental program
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Embodiment

[0047] In this embodiment, a static camera and a dynamic camera installed in different locations in a certain room are calibrated. The resolution of static camera and dynamic camera is 320*240.

[0048] This embodiment includes the following steps:

[0049] Step 1, pre-set the motion track of the dynamic camera as a zigzag, the dynamic camera automatically rotates along the given motion track, and samples a sub-image every time t, and at the same time, according to the time sequence of acquisition, for each The sub-image label records the parameters of the dynamic camera rotation each time the image is captured, namely: the horizontal rotation angle and the vertical rotation angle, and combines each sub-image and its corresponding label with the corresponding dynamic camera rotation parameters and position information. and store it.

[0050] In this embodiment, the motion trajectory of the dynamic camera is as follows: figure 1 As indicated by the arrow in (a), respectively...

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Abstract

The invention relates to a full automatic calibration method of a master-slave camera chain in the technical field of image processing. In the invention, an image which is automatically obtained in the process of rotating a dynamic camera is spliced into a mosaic image and then the characteristic points of the image and the image of a master camera are automatically extracted and matched, thereby obtaining a calibration result between the coordinates of the pixel of the image of a static camera and the control parameter of the dynamic camera and realizing the full automatic calibration of the master-slave camera chain. The range of the visual field of the dynamic camera is represented by the mosaic spliced image, the relationship between two different imaging planes is estimated by utilizing an SURF characteristic point, only the motion trace of the dynamic camera needs to be established beforehand, the master-slave camera chain can be automatically calibrated, the automatic calibration of the master-slave camera chain can be realized under the condition that the calibration accuracy keeps better (the error rate is 3 to 5 percent), the manpower and the time are saved, and the complexity in the calibration process is lowered.

Description

technical field [0001] The invention relates to a method in the technical field of image processing, in particular to a fully automatic calibration method for a master-slave camera system. Background technique [0002] At present, public places are generally equipped with camera monitoring systems, and a large number of cameras are installed for large coverage areas. With the development of surveillance systems, there is an increasing demand for high-resolution surveillance images. The master-slave camera monitoring system is a solution to this problem. In such a system, one (or more) fixed cameras act as a leader, leading one (or more) dynamic (PTZ) cameras to focus on objects of interest. In this way, a macro surveillance image of a wide area can be obtained, and a high-resolution image of the target can be obtained. The calibration of the master-slave camera system is the solution to this problem. After the calibrated master-slave camera monitoring system, when the ma...

Claims

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Application Information

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IPC IPC(8): G06T7/00
Inventor 宋利王嘉徐奕李铀
Owner SHANGHAI JIAO TONG UNIV
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