Moving Body Tracking Across Elevators Using Target Floor Prediction
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Solution Overview
Problem
Conventional moving body tracking systems face challenges in accurately predicting the movement path of targets when they board elevators, leading to misidentification and difficulty in tracking, especially when multiple moving bodies with similar features are present.
Innovation Solution
A system that integrates elevator operation information to determine the likely unboarding floor of a tracking target, allowing selection of appropriate cameras for continued tracking, thereby enhancing the accuracy of identifying and tracking the target even when elevators are involved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cameras are installed in all areas including elevators to improve tracking accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts the elevator monitoring function from the general camera network by utilizing the elevator's own built-in camera system. Instead of installing cameras in all possible locations including elevators, the system selectively uses the elevator's existing imaging devices to capture images only when the elevator is in operation or at stopping floors, thereby maintaining tracking accuracy without increasing overall system complexity
Solution Approach 2:
The patent makes the elevator's built-in camera serve multiple functions: it acts as both the elevator's standard safety/monitoring device and as part of the tracking system when needed. This multi-functionality eliminates the need for dedicated tracking cameras in elevators while maintaining measurement precision
2Measurement precision
If all cameras in the building are used for comparison to improve identification accuracy, then measurement precision is improved, but loss of time increases due to increased computational load
Solution Approach 1:
The patent segments the camera network into multiple independent groups based on spatial location and functional zones. Instead of comparing images from all cameras simultaneously, the system divides the building into zones and processes images from relevant zones separately, reducing the number of comparisons needed while maintaining identification accuracy through localized feature matching
Solution Approach 2:
The patent performs preliminary image processing and feature extraction at each camera location before central comparison. By pre-processing images to extract only relevant features (such as human figures, vehicles, or objects of interest) and their key characteristics, the system reduces the data volume for comparison and speeds up the identification process
3Measurement precision
If cameras are installed without blind spots to improve movement path prediction, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses elevators as intermediary nodes to bridge gaps in the camera network. Since elevators move between floors and have their own imaging capabilities, they serve as mobile monitoring points that can observe areas between floors without requiring additional fixed cameras in corridors or stairwells, thereby improving movement path prediction while avoiding extensive camera installation
Data Source
AI summary
A moving body tracking system includes: a selecting unit (138) that select a target camera from a plurality of cameras disposed in a monitored area; a moving body detecting device (120) that extracts features of a moving body detected in an image captured by the target camera; a comparing unit (139) that compares the extracted features with the features of a tracking target moving body, to identify the tracking target moving body; a tracking managing unit (140) that tracks the movement of the tracking target moving body in the monitored area based on the position of the target camera and the time at which the image including the moving body was captured; and an elevator information acquiring unit (137) that acquires elevator operation information indicating an operation status of an elevator from an elevator system. When the tracked moving object boards an elevator, a selecting unit (138) refers to the elevator operation information to specify a target floor that is a floor on which the tracking target moving body is likely to unboard the elevator and selects at least one camera disposed on the target floor out of the plurality of cameras as the target camera.