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Intelligent video monitoring method based on automatic calibration of camera

An intelligent video monitoring and automatic calibration technology, applied in image analysis, image data processing, closed-circuit television systems, etc., can solve the problems of manual detection, the accuracy of vanishing points and vanishing lines cannot be guaranteed, and the accuracy of calibration results can be affected, so as to improve the accuracy of the calibration results. The effect of accuracy

Active Publication Date: 2012-10-10
ZHEJIANG ICARE VISION TECH
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Problems solved by technology

[0004] CN101951502A discloses a three-dimensional intelligent video monitoring method, which adopts the traditional camera calibration method, and currently there are many camera calibration methods applied to video monitoring, and there will be more or less shortcomings in actual applications
The disadvantages of this method are: the end point of the calibration rod needs to be detected manually; when the lens distortion of the camera is serious, the accuracy of the vanishing point and the vanishing line cannot be guaranteed, and finally affects the accuracy of the calibration result

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  • Intelligent video monitoring method based on automatic calibration of camera
  • Intelligent video monitoring method based on automatic calibration of camera
  • Intelligent video monitoring method based on automatic calibration of camera

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Embodiment Construction

[0039] Such as figure 1 and 2 , the intelligent video monitoring method based on camera automatic calibration of the present invention comprises two big steps: one, first, automatic calibration to camera; Two, apply calibration result in video monitoring image, calculate all target related information, realize intelligent video monitoring .

[0040] The camera is automatically calibrated as follows:

[0041] Apply motion detection, tracking and classification methods in the prior art to select a person in the video as a reference object for calibration;

[0042] Calculate the minimum compact bounding box of the reference object, further extract the feature points of the target, and use it to obtain the size, speed and other parameters of the reference object;

[0043] Such as image 3 , the relationship between the camera coordinate system and the ground coordinate system, according to the imaging angle of the camera, the determination formula for the height and position ...

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Abstract

The invention provides an automatic calibration method of a camera and an intelligent video monitoring method based on automatic calibration of the camera. The intelligent video monitoring method comprises the following two steps of: firstly, automatically calibrating the camera; and applying a calibration result in a video monitoring image, and calculating all relative target information to realize intelligent video monitoring. The intelligent video monitoring method disclosed by the invention can automatically calibrate by utilizing the camera, and avoids operation of manually marking reference points, a package box can be replaced by a minimum compact package box, thus being capable of improving the precision of a calculation result, reducing manual mark in a calibration process relative to a geometric model based on a vanishing point and a vanishing line, and being simple in operation.

Description

technical field [0001] The invention belongs to the field of video monitoring, in particular to an intelligent video monitoring method based on camera automatic calibration. Background technique [0002] With the rapid development of computer, network, and image technology, video surveillance technology has made great progress, and wireless, high-definition and intelligent technologies are continuously applied to the field of video surveillance. Traditional video surveillance is generally only used for post-event video evidence collection, and a large number of videos need to be manually observed for evidence collection. The core technology of intelligent video surveillance is to analyze video sequences of fixed scenes in real time, detect, identify, track and understand the behavior of targets, and finally trigger alarms according to pre-established rules. The application of intelligent video surveillance technology can eliminate or greatly reduce human intervention. [0...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/20H04N7/18
Inventor 尚凌辉贺磊盈刘家佳高勇
Owner ZHEJIANG ICARE VISION TECH
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