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PTZ tracking method and system based on multi-layered full-view modeling

A hierarchical and panoramic technology, applied in the field of image stitching technology, can solve the problem of lack of global information of a single PTZ camera

Inactive Publication Date: 2010-06-02
湖北莲花山计算机视觉和信息科学研究院
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that a single PTZ camera lacks global information, the present invention realizes the monitoring of a large scene by a single PTZ camera

Method used

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  • PTZ tracking method and system based on multi-layered full-view modeling
  • PTZ tracking method and system based on multi-layered full-view modeling

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Embodiment Construction

[0018] specific implementation plan

[0019] 1. Generation of panoramas and division of scene areas

[0020] In the system, we adopt the method proposed in "Automatic Panoramic Image Stitching using Invariant Features" (IJCV 07) by Matthew Brown, David G. Lowe to generate panoramas. First, use the PTZ camera to take a series of discrete pictures of the monitoring scene. These pictures are called keyframes in the following steps. The requirement for keyframes is that two adjacent keyframes need to have a certain overlapping area. . Extract the SIFT feature points from these pictures and match the adjacent key frames to find the correct matching points, and use the coordinate information of the correct matching points to calculate the positions of these pictures in the world coordinate system. Here, in order to eliminate the cumulative error, adopt A global optimization method called Bundleadjustment. Use the obtained coordinate information of the key frame in the world coord...

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Abstract

The invention discloses a PTZ tracking method based on multi-layered full-view modeling, which comprises the steps of: 1, establishing a multi-layered view model by using SIFI characteristic points; and 2, determining the whole position of the current monitoring view by using the matching of the SIFI characteristic points. By using the algorithms, the invention can effectively expand the size adaptability of an SIFI characteristic point set in an image, solve the problem that a PTZ camera can not effectively match with the view model during the large-size zooming, and realizes the positioning of the current monitoring range in the whole view by the single PTZ camera, thereby optimizing the PTZ tracking effect and obtaining the motion track information of a monitored target in the whole view.

Description

technical field [0001] The invention relates to the field of video monitoring, in particular to the fields of image splicing technology, scene positioning, PTZ tracking, track fitting and scene analysis. Background technique [0002] Video surveillance is an important part of the security system, and it is a comprehensive system with strong prevention capabilities. Video surveillance is widely used in many occasions because of its intuition, accuracy, timeliness and rich information content. In recent years, with the rapid development of computer, network, image processing and transmission technology, video surveillance technology has also made great progress. At present, according to the different types of surveillance cameras used in the surveillance system, they are divided into bolt-action (fixed camera) surveillance and PTZ camera (ball camera) surveillance. Because PTZ cameras have the advantages of larger monitoring scenes, wider range of tracking targets, and varia...

Claims

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Application Information

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IPC IPC(8): H04N5/232H04N7/18
Inventor 朱松纯林倞薛康
Owner 湖北莲花山计算机视觉和信息科学研究院
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