Vehicle Risk Area Identification for Occlusion-Aware Pedestrian Warnings
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Solution Overview
Problem
Existing systems fail to accurately identify and manage risk areas that are obscured from a vehicle's view due to occlusions, leading to potential warnings for pedestrians on sidewalks, which can be misleading or unnecessary.
Innovation Solution
An information processing apparatus in vehicles uses sensors to identify risk areas by determining vertices of obscured regions and communicates with a server to verify the presence of terminals within these areas, ensuring warnings are only issued when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the risk area is expanded to cover larger areas for safety, then more pedestrians can be detected, but sidewalks are incorrectly included causing unnecessary warnings
Solution Approach 1:
The risk area identification is segmented into two distinct components: the basic risk area (polygon) and the protected area (circular region). This segmentation allows the system to separately manage the core risk zone and the extended protection zone, preventing sidewalk inclusion in warning triggers while maintaining comprehensive safety coverage.
Solution Approach 2:
The protected area acts as an intermediary buffer zone between the basic risk area and the sidewalk regions. By introducing this intermediate circular region centered at the polygon centroid, the system extends safety coverage without directly including sidewalk areas in the risk area that triggers warnings.
2Measurement precision
If warning sensitivity is increased to detect all potential risks, then more safety issues are identified, but false warnings occur due to sidewalk pedestrians
Solution Approach 1:
The warning trigger mechanism is segmented to distinguish between the basic risk area (polygon) and the protected area (circular region). Warnings are triggered only when pedestrians enter the basic risk area, not when they are in the protected area or on sidewalks, thereby reducing false warnings while maintaining high detection sensitivity for actual risks.
Solution Approach 2:
Different quality thresholds are applied to different spatial zones: the basic risk area uses a strict warning trigger threshold, while the protected area serves as a buffer zone that extends safety coverage without triggering warnings. This local differentiation of warning thresholds eliminates false alarms from sidewalk pedestrians.
3Productivity
If vehicle speed increases to improve traffic flow, then transportation efficiency improves, but risk area calculation becomes less accurate
Solution Approach 1:
The protected area radius is made dynamic by linking it to vehicle speed through the relationship r = v × t. As vehicle speed increases, the protected area radius automatically adjusts to maintain appropriate safety margins. This dynamic adjustment ensures accurate risk area calculation across varying traffic conditions without compromising safety.
Data Source
AI summary
An information processing apparatus includes a risk area identification unit configured to identify a risk area outside a moving object and a transmission control unit configured to perform control for transmitting risk area information representing the risk area identified by the risk area identification unit to a server configured to retain information related to the risk area, in which the risk area identification unit is configured to identify an area defined by a plurality of points as the risk area, and the risk area identification unit is configured to identify, based on a boundary between a first area in which the moving object is prohibited from moving and a second area in which the moving object is allowed to move, a shape of the risk area on a side of the first area.