Privacy-Preserving Security Management for Private Booths
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Solution Overview
Problem
In public spaces like stations and airports, it is challenging to detect suspicious objects or abnormalities, such as left-behind items or damage, in private areas like toilet booths without compromising user privacy, as traditional surveillance cameras cannot be installed in these areas.
Innovation Solution
A security management system that includes an image pickup apparatus, an abnormality determination unit, a notification data generation unit, and an abnormality notification unit, which detect and notify abnormalities based on images captured within the target booth, ensuring user privacy by extracting outlines or using door sensors for entry/exit detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a surveillance camera is installed in a target booth (toilet, changeroom, shower room), then security monitoring capability is improved, but user privacy is compromised
Solution Approach 1:
The patent extracts only the essential security information (presence/absence of objects, abnormal events) from the complete visual scene, transmitting only this extracted data rather than full images. This separates the security monitoring function from the privacy-infringing detail capture, allowing security checks while preserving user privacy.
Solution Approach 2:
The system introduces an intermediary processing layer that captures images but immediately processes them to extract only security-relevant information (object presence, abnormalities) before transmission. This intermediary step acts as a buffer that prevents direct privacy infringement while maintaining security monitoring capability.
2Reliability
If traditional surveillance cameras are used in public spaces, then security monitoring is achieved, but they cannot be installed in closed target booths
Solution Approach 1:
The patent replaces the traditional mechanical surveillance camera system with a hybrid system that uses an image pickup device combined with automated image processing and object detection algorithms. This substitution enables the system to function in closed spaces where traditional cameras cannot be installed, as the processed data can be transmitted remotely without requiring continuous camera presence in the closed space.
3Measurement precision
If clear images of booth interior are transmitted for security analysis, then detection accuracy is improved, but user privacy is compromised
Solution Approach 1:
The system extracts only the essential security-critical information (presence of suspicious objects, abnormal events, entry/exit status) from the complete image data, transmitting only this extracted information rather than full clear images. This maintains sufficient detection accuracy for security purposes while eliminating privacy-infringing visual details.
Solution Approach 2:
The patent applies different quality levels to different parts of the image data: security-critical regions (object locations, abnormal areas) are analyzed in detail, while other regions are processed at lower resolution or aggregated into summary statistics. This local differentiation maintains detection accuracy where needed while protecting privacy in other areas.
Data Source
AI summary
The present invention provides a technology which performs security management while ensuring privacy of a user. The present invention is provided with: an image-capturing device which captures an image of the inside of a target booth such as a toilet booth, a shower booth, and a dressing room; an abnormality determination means which determines abnormality in the target booth on the basis of the image captured by the image-capturing device; a notification data generation means which generates notification data on the basis of the abnormality determination result; and an abnormality notification means which provides a notification of the notification data.