A fast estimation method of real-time attitude of ptz surveillance camera

A monitoring camera and video camera technology, applied in computing, image analysis, image data processing, etc., can solve the problems of long iterative search time, affecting the real-time performance of the algorithm, and low dependence on image color features, achieving small average projection error, The effect of improving efficiency

Active Publication Date: 2016-08-24
北京天睿空间科技股份有限公司
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Problems solved by technology

[0005] In actual use, this method adopts the projection method, iteratively optimizes, and has a low dependence on the color characteristics of the image, and it can still ensure good accuracy when changing the PTZ parameters of the camera at a large angle, but there are also problems that the PTZ parameters change more rapidly. Larger, the longer the iterative search time will be, which will affect the real-time performance of the algorithm

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  • A fast estimation method of real-time attitude of ptz surveillance camera
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  • A fast estimation method of real-time attitude of ptz surveillance camera

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[0022] see figure 1 and figure 2 , the present invention provides a method for quickly estimating the real-time attitude of a PTZ (PTZ control) surveillance camera, using the scene structure panorama as a reference image for video matching, and performing panorama matching on the real-time video, so as to find the real-time video in the scene structure panorama The corresponding area, and determine the homography relationship between the real-time video and the scene structure panorama (which can be embodied in the form of a homography matrix), and calculate the homography relationship and the attitude parameters of the scene structure panorama The attitude parameters of the real-time video are obtained (the projection matrix of the real-time video is obtained by multiplying the homography matrix with the original projection matrix), and the scene structure panorama can be one or more.

[0023] The panorama matching refers to performing a real-time search in the scene struct...

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Abstract

The invention relates to a PTZ surveillance camera realtime posture rapid estimation method. A scene structure panorama picture is adopted as a referential image of video matching and panorama matching is conducted on a realtime video, so that the area which the realtime video corresponds to is found in the scene structure panorama picture and a single corresponding relation between the realtime video and the scene structure panorama picture is determined. Through the single corresponding relation and calculation of a posture parameter of the scene structure panorama picture, a posture parameter of the realtime video is obtained. By means of the PTZ surveillance camera realtime posture rapid estimation method, the realtime posture of a camera can be rapidly estimated, an average processing speed can reach 15-20 fps. Moreover, an average projection error is small and realtime updating of the camera posture can be achieved effectively.

Description

technical field [0001] The invention relates to a calculation method for video monitoring, in particular to a method for quickly estimating the real-time posture of a PTZ monitoring camera. Background technique [0002] The wide application of PTZ cameras in the surveillance field has brought new challenges to the AVE surveillance system. Because the user can arbitrarily perform PTZ and zoom operations of the camera, this requires quick calibration of the camera at any attitude. In the traditional method, certain manual intervention and interactive operation are required to determine the corresponding relationship between 2D and 3D. This method is difficult to meet the requirements of real-time response in the monitoring system. [0003] The following methods can solve the problem of real-time calibration of PTZ cameras: [0004] H. S. Sawhney, A. Arpa, R. Kumar et al. proposed a new solution mode in "Video Flashlights-Real TimeRendering of Multiple Videos for Immersive Mo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00H04N7/18
Inventor 沈晓蓉何彬李洪涛冯亚北
Owner 北京天睿空间科技股份有限公司
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