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PTZ (pan/tilt/zoom) camera automatic positioning and angle calculating method

A PTZ camera, angle calculation technology, applied in computing, image communication, special data processing applications, etc., can solve the problem that the observation distance is not far enough

Inactive Publication Date: 2013-01-30
TIANJIN YAAN TECH CO LTD
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Problems solved by technology

[0004] However, in a monitoring system combining a wide-angle camera and a pan-tilt camera, although the wide-angle camera has a large viewing angle, its observation distance is not far enough. If a telephoto camera is used instead of a wide-angle camera, longer distance monitoring can be achieved.

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  • PTZ (pan/tilt/zoom) camera automatic positioning and angle calculating method

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Embodiment Construction

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] A kind of angle calculation method that a pan-tilt camera is automatically positioned based on the telephoto camera image of the present invention comprises the following steps:

[0027] 1) Use the geometric relationship to deduce the functional relationship between the coordinate value of the image point in the telephoto camera image plane coordinate system and the coordinate value of the real point in the road plane coordinate system of the area captured by the telephoto camera, where the image point is the telephoto camera The point on the image, the real point is the image point on the road surface in the area captured by the telephoto camera;

[0028] 2) Select any image point on the telephoto camera image as the refer...

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Abstract

The invention discloses a PTZ (pan / tilt / zoom) camera automatic positioning and angle calculating method which comprises the following steps of: calculating to obtain a model for the conversion between the coordinates of a point on an image of a long-focus camera and the coordinates of a rotation angle of a PTZ camera; and then, according to the coordinate information of a moving target on the image monitored and tracked by the long-focus camera, enabling the PTZ camera to quickly rotate to a corresponding optic axial angle so as to perform partial centralized video acquisition on the region of the moving target. According to the PTZ camera automatic positioning and angle calculating method, a multi-camera intelligent monitoring system in which the long-focus camera and the PTZ camera are matched with each other can be realized and can be widely used in the field of video monitoring.

Description

technical field [0001] The invention relates to the technical field of video image processing, in particular to an angle calculation method for automatically positioning a pan-tilt camera based on a telephoto camera image. Background technique [0002] With the continuous development of intelligent monitoring technology and the increasing maturity of image processing technology, the original monitoring of suspicious targets by manpower can no longer meet the needs, while the intelligent security system based on artificial intelligence and video analysis technologies can largely Make up for the shortage of manpower. The advantage of the intelligent security system is that it can analyze the monitoring scene around the clock, find suspicious targets in the scene in real time, and notify the monitoring personnel to make decisions through alarms and other forms. Therefore, it has a broad development space and a huge potential market. [0003] In the field of monitoring, the com...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCH04N5/232H04N23/695
Inventor 叶晨武付军张福明张羽
Owner TIANJIN YAAN TECH CO LTD
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