Navigation Message Prioritization for Visually Impaired
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Solution Overview
Problem
Existing navigation systems for visually impaired individuals do not effectively provide personalized and prioritized guidance, failing to account for danger, assistance, and perceivable objects along a route, which can lead to navigation challenges and stress.
Innovation Solution
A navigation apparatus and method that generates a route with nodes, map information items classified as alert, walking-assistance, and landmark items, and prioritizes their presentation in navigation messages based on proximity and relevance, using a route generating unit and navigation message generating unit to provide voice guidance and notifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all map information items are presented in navigation messages, then information completeness is improved, but information overload and user stress increase
Solution Approach 1:
The patent segments map information items into three distinct categories: alert items (dangerous objects), walking-assistance items (objects aiding navigation), and landmark items (perceivable objects). This segmentation allows the system to selectively present information based on category priority, ensuring critical safety information is conveyed while filtering out non-essential details that would contribute to information overload and user stress.
Solution Approach 2:
The patent applies local quality by assigning different presentation priorities to different types of map information items based on their specific characteristics and importance. Alert items receive highest priority for immediate notification, walking-assistance items receive medium priority, and landmark items receive lowest priority. This differentiated quality assignment ensures that each type of information is presented with appropriate emphasis, maintaining completeness while preventing overwhelming the user with uniformly treated information.
2Measurement precision
If navigation messages include detailed map information items, then navigation accuracy is improved, but message complexity increases
Solution Approach 1:
The patent segments navigation messages into structured components based on map information item categories. Each category (alert, walking-assistance, landmark) is handled with specific presentation rules, creating a modular message structure. This segmentation maintains navigation accuracy by ensuring all relevant information types are included while reducing overall complexity through systematic organization and selective presentation based on user needs and context.
3Reliability
If navigation system provides comprehensive guidance information, then navigation reliability is improved, but information processing time increases
Solution Approach 1:
The patent applies preliminary action by pre-classifying map information items into alert, walking-assistance, and landmark categories before generating navigation messages. This pre-processing step establishes a ready-to-use classification framework that enables rapid message generation during actual navigation. The system maintains navigation reliability through comprehensive categorization while reducing processing time by having the classification structure prepared in advance rather than creating it in real-time.
Data Source
AI summary
An apparatus for generating a navigation message includes a route generating unit configured to generate a route, and a navigation message generating unit configured to generate a navigation message about the generated route based on the generated route, one or more map information items of the generated route, and an order of priority in which map information items are presented.