Multi-Target Video Tracking for Public-Place Infection Detection
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Solution Overview
Problem
Existing methods fail to accurately locate and verify the identity of potential infected individuals in heavily populated public places like airports and train stations during an epidemic, as they either have limited scope or low precision in identifying individuals who may have come into contact with a confirmed case.
Innovation Solution
A method and system using multi-target tracking based on epidemic propagation mechanisms, employing video monitoring devices to determine the location and track potential infected individuals, and verify their identity through spatial and temporal features, including constructing feature pyramids and calculating similarities in video frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If video monitoring devices are used to actively search for potential infected persons in public places, then the coverage and detection capability are improved, but the difficulty of detecting and measuring individual identities and contact trajectories increases
Solution Approach 1:
The patent introduces multi-target tracking technology as an intermediary mechanism between video monitoring and identity verification. The system uses tracking algorithms to continuously follow and record the trajectories of multiple individuals in public spaces, creating detailed motion profiles that serve as intermediaries for identifying potential infected persons without directly exposing their identities during the tracking process
Solution Approach 2:
The patent transitions from traditional two-dimensional video frame analysis to multi-dimensional tracking by incorporating temporal trajectories, spatial paths, and time-series data. This dimensional expansion allows the system to distinguish individuals based on their motion patterns and contact histories, significantly improving detection precision in crowded environments
2Measurement precision
If multi-target tracking is used to follow potential infected persons through video frames, then the accuracy of locating individuals is improved, but the complexity of the system increases
Solution Approach 1:
The patent segments the complex tracking task into distinct functional modules: video frame acquisition, target detection, trajectory tracking, and identity verification. Each module handles a specific aspect of the tracking process, making the overall system more manageable and easier to implement despite the increased functionality required for accurate multi-person tracking
3Reliability
If identity verification is performed based on temporal and spatial features, then the reliability of confirming potential infected persons is improved, but the loss of time for processing and verification increases
Solution Approach 1:
The patent performs preliminary tracking and feature extraction during the normal operation phase, building temporal and spatial profiles of individuals before any verification is needed. When a potential infected person needs to be identified, the system already has pre-processed trajectory data and motion patterns ready, significantly reducing the time required for actual verification while maintaining high reliability
Data Source
AI summary
Disclosed are a method, device and system for tracking potential infected persons in a public place during an epidemic period. The method comprises: determining, according to associated information of a confirmed case, times of motions of the confirmed case in a public place and matching location information; searching for potential infected persons by means of video frame data provided by video monitoring devices in the public place based on an epidemic propagation mechanism; and tracking the potential infected persons based on multi-target tracking, and verifying the identity of the potential infected persons according to critical time nodes in the public place.