Navigation Device Automatic Guide Image Priority Switching
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Solution Overview
Problem
Conventional in-vehicle navigation devices using superimposed guide figures on photographed images can be difficult to understand due to obstacles, curved or sloped roads, poor visibility at night or in rain, and require user-operated switching between map and photographed guides, leading to potential misinterpretation of turn intersections.
Innovation Solution
A navigation device with a state acquisition section, map guide generation section, and guide display control section that automatically determines and prioritizes between map guide images and photographed guide images based on external conditions like obstacles, visibility, and weather, ensuring high visibility without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If guide image display using photographed image with superimposed guide figure is used, then the user can intuitively understand the direction to travel, but the guide image may be difficult to understand when the view is blocked by obstacles, curved roads, poor visibility at night or in rain
Solution Approach 1:
The system dynamically changes the display parameter (switching between photographed guide image and map guide image) based on environmental conditions such as visibility, obstacles, and road geometry. When the photographed image becomes unreliable due to poor visibility or blocking obstacles, the system transitions to displaying the map guide image instead, thereby maintaining guide reliability across varying conditions.
Solution Approach 2:
The navigation device automatically determines and switches between guide image types without requiring user intervention. The system self-monitors the reliability of the photographed guide image and autonomously selects the appropriate display mode (photographed or map guide) based on detected environmental factors, eliminating the need for manual switching operations.
2Adaptability or versatility
If guide image display using photographed image with superimposed guide figure is used, then the user can see the actual road view, but the user requires troublesome operation to switch between map guide and photographed guide
Solution Approach 1:
The system performs automatic switching between map guide and photographed guide displays without requiring user operations. The guide display control section autonomously monitors environmental conditions and switches the display mode accordingly, eliminating the troublesome manual switching operation while maintaining display flexibility.
Solution Approach 2:
The display mode is made dynamic and automatically adapts to changing environmental conditions. The system transitions between static display modes (map guide or photographed guide) based on real-time assessment of visibility, obstacles, and road geometry, providing flexibility without requiring user intervention.
3Reliability
If map guide image using map information is used, then the guide target intersection is clearly visible, but the user may have difficulty understanding the actual road situation
Solution Approach 1:
The system dynamically adjusts the display parameter by switching between map guide image and photographed guide image based on environmental conditions. When the photographed image provides poor road situation recognition, the system transitions to the map guide image which clearly shows the guide target intersection, and vice versa, optimizing both clarity and recognizability according to conditions.
Data Source
AI summary
In a navigation device for providing a guide from an origin to a destination, a display section displays a guide image indicating the guide to the destination. A state acquisition section acquires a state outside a vehicle. A photographed guide generation section generates a photographed guide image, using a photographed image of a captured forward direction of the vehicle. A map guide generation section generates a map guide image, using map information. Based on the state outside the vehicle acquired by the state acquisition section, a state determination section determines which one of the photographed guide image and the map guide image is to be displayed by priority. Based on the determination made by the state determination section, a guide display control section allows the guide image including at least one of the photographed guide image and the map guide image to be displayed in the display section.