Event Search Area Definition for Post-Event Retrieval
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional surveillance systems, such as CCTV systems, lack the ability to allow users to specify a search area for events that have already occurred, limiting the capability to retrieve past events within a specific location.
Innovation Solution
An event search system comprising a sensor to detect events, a camera to capture images with metadata including occurrence time and location, and an event search device that allows users to specify a search area, enabling the retrieval of events that occurred within that area by using the metadata.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a user sets an area of interest (ROI) in advance, then the user can search for events in that ROI, but the user cannot search for events in a specific area after an event has occurred
Solution Approach 1:
The system allows the search area to be dynamically changed from a pre-set fixed ROI to a user-specified area after event occurrence. The search area is no longer static but can be adjusted based on user needs post-event, enabling flexible retrospective searches without requiring advance area specification.
2Ease of operation
If only time condition is entered for event search, then the search process is simple, but the search results include events from all locations making it difficult to find specific events
Solution Approach 1:
The system segments the search criteria into independent components: time condition and location condition. Users can enter only time condition for simple searches, or add location condition (event search area) when needed. This segmentation allows users to maintain search simplicity while having the option to add location precision when required.
3Measurement precision
If location condition is required for past event search, then precise location-based search is possible, but the user must enter location condition after event occurrence which complicates the search process
Solution Approach 1:
The system automatically captures and stores location information (event search area) at the time of event occurrence through the camera's metadata. This pre-captured location data is then automatically used in retrospective searches, eliminating the need for users to manually input complex location conditions and reducing search complexity while maintaining location accuracy.
Data Source
AI summary
An event search device includes: a first communication unit configured to receive, from a camera, a plurality of image frames of a surveillance area generated in response to an occurrence of an event; and metadata including time information of the occurrence of the event and location information of an event in the image frames; a user interface configured to receive a search condition for searching for the event, the search condition including an event search area; a screen unit configured to display the event search area on the image frames; and a control unit configured to search for an event satisfying the search condition within the event search area by using the metadata, wherein at least one of a location, a size, and a shape of the event search area is defined through the user interface.