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Multi-target positioning method based on camera network

A camera network and multi-target positioning technology, which is applied in the field of multi-target positioning based on the camera network, can solve the problem that the topology relationship estimation method is difficult to adapt to the dynamic changes of the camera network

Active Publication Date: 2015-07-15
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology

The topological relationship estimation method is difficult to adapt to the dynamic changes of the camera network, and it is only suitable for the case where the cameras have no overlapping fields of view

Method used

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  • Multi-target positioning method based on camera network
  • Multi-target positioning method based on camera network
  • Multi-target positioning method based on camera network

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Embodiment Construction

[0066] The invention discloses a multi-target positioning method based on a camera network, and its processing flow is as follows figure 1shown. It includes the following steps: First, in the initialization phase, the initialization of the camera network is completed through four steps: building overlapping cameras, calculating camera homography conversion, calculating camera overlapping view fields, and calculating camera mapping models; secondly, in the target positioning phase, completing Target detection and tracking in a single camera, and target matching by comprehensively utilizing the topological relationship between cameras, geometric constraints and target feature information, and finally using the camera model to calculate the physical position of the target to achieve multi-target positioning.

[0067] In this embodiment, a certain floor in the room is selected as the implementation environment, and a camera network including 12 cameras (Cam) is constructed, and it...

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Abstract

The invention discloses a multi-target positioning method based on a camera network and belongs to the technical field of multimedia sensor networks. The multi-target positioning method comprises steps as follows: firstly, at the initialization stage, camera network initialization is completed through four steps of establishment of a camera unit, computation of camera homography conversion, computation of camera overlapping vision fields and computation of a camera mapping model; secondary, at the target positioning stage, target detection and tracking of a single camera are completed, and target matching is realized through comprehensive utilization of the topological relation among the cameras, as well as geometric constraint and target characteristic information; finally, physical location of targets is computed by the aid of the camera model, and multi-target positioning is realized. According to the multi-target positioning method based on the camera network, stable tracking of multiple targets can be realized, and the method has the characteristics of low cost, high positioning accuracy, stable operation and the like and has broad application prospect in the fields of battlefield reconnaissance, safety monitoring, boundary protection and the like.

Description

technical field [0001] The invention relates to a method in the technical field of target positioning, in particular to a multi-target positioning method based on a camera network. Background technique [0002] Target positioning technology based on sensor network has important applications in many fields such as military defense, urban management, environmental monitoring, emergency rescue and disaster relief, anti-terrorism and anti-terrorism. However, as the monitoring environment becomes more and more complex and changeable, the traditional sensor network based on scalar data collection and processing can no longer meet the application requirements of comprehensive perception and understanding of the environment. Network-based environmental monitoring activities to achieve comprehensive environmental monitoring and precise target positioning. [0003] At present, the research on target positioning technology based on camera network has been paid more and more attention,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/20H04N7/18
Inventor 李毅吴振锋姜晓涛刘兴川贲伟
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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