Satellite Image Change Detection for Up-to-Date Parking Maps
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Solution Overview
Problem
Existing map generation methods fail to efficiently incorporate real-time changes and updates, such as newly opened or closed facilities, into maps, leading to outdated information.
Innovation Solution
A map generation device that utilizes satellite images to determine change points over time, incorporating information on parking lot usage, vehicle presence, character figure changes, and camp discomfort, and generates maps with superimposed camera images to reflect real-time updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional map generation methods are used, then map generation is simple, but the map information becomes outdated and fails to reflect real-time changes
Solution Approach 1:
The system performs preliminary actions by continuously monitoring satellite images and detecting change points before users need updated map information. The change point detection unit proactively identifies modifications in satellite images, and the map generation unit prepares updated maps in advance, ensuring fresh information is available when needed without requiring complex real-time processing at the moment of use.
Solution Approach 2:
The patent introduces an intermediary mechanism - the change point detection unit - that mediates between raw satellite images and the final map output. This intermediary analyzes satellite images for changes, determines what has modified, and selectively updates only necessary map portions, thereby maintaining information freshness while avoiding the complexity of complete map regeneration.
2Loss of information
If satellite images are continuously monitored for changes, then map information freshness is improved, but processing time and computational resources increase
Solution Approach 1:
The system extracts only the essential change information from satellite images rather than processing entire images comprehensively. The change point detection unit identifies specific change points - locations where facilities have been added, removed, or modified - and extracts only this relevant information for map updates, significantly reducing processing time while maintaining accurate facility change detection.
Solution Approach 2:
The system applies partial action by updating only the portions of the map that contain changed facilities rather than regenerating entire maps. The map generation unit selectively incorporates change point information into relevant map areas, avoiding unnecessary processing of unchanged regions and reducing overall processing time while ensuring accurate representation of changed facilities.
Data Source
AI summary
The map generation device includes a satellite image acquisition unit that acquires a satellite image captured by an artificial satellite, a change point determination unit that determines a change point of the satellite image with time based on the satellite image, and a map generation unit that generates a map based on information of the determined change point. Based on the satellite images, the usage status of the parking lot is reflected in the map.