Superimposed Image Display Device Using 3D Map Data
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Solution Overview
Problem
Existing superimposed image display devices for vehicles fail to accurately express the positional relationship between guide images and nearby structures, such as roads and buildings, due to neglecting the three-dimensional shapes of these structures in their calculations.
Innovation Solution
The system uses three-dimensional map information to specify the shapes of roads and nearby structures, arranging guide images within this context to ensure accurate visual recognition by the driver, allowing for precise superimposition of guide images on the vehicle's HUD or windshield display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two-dimensional map information is used for superimposed image display, then device complexity is reduced, but manufacturing precision deteriorates because the three-dimensional shape of structures cannot be accurately represented
Solution Approach 1:
The patent transitions from two-dimensional map information to three-dimensional map information to accurately represent the spatial relationships between guide images and surrounding structures. By incorporating the Z-axis (height) dimension, the system can properly position guide images relative to buildings and other elevated structures, resolving the contradiction between simplicity and precision.
2Manufacturing precision
If three-dimensional map information is used to accurately represent structures, then manufacturing precision is improved, but device complexity increases due to more complex data processing requirements
Solution Approach 1:
The patent performs preliminary processing of three-dimensional map information by pre-calculating and storing the spatial relationships between map features and guide image positions. This preparation work is done in advance, allowing the display device to use pre-processed data rather than performing complex real-time calculations, thus reducing the operational complexity while maintaining high precision.
3Ease of operation
If the shape of structures is not considered in image superimposition, then ease of operation is improved, but reliability deteriorates because the positional relationship between guide image and structure cannot be accurately expressed
Solution Approach 1:
The patent changes the parameters used in image display calculations from simple two-dimensional coordinates to comprehensive three-dimensional parameters that include height and spatial orientation. By incorporating these additional parameters, the system maintains ease of operation through standardized calculation procedures while significantly improving the reliability of positional relationship representation.
Data Source
AI summary
Superimposed-image display devices and programs display a guide image providing a guidance of information to a driver of a vehicle such that the guide image is superimposed on a view ahead of the vehicle and is visually recognized. The systems and programs obtain three-dimensional map information that specifies a three-dimensional shape of a road and a structure nearby the road and arrange the guide image in the three-dimensional map information, based on the three-dimensional shape of the road and the structure nearby the road. The systems and programs obtain a shape of the guide image that is visually recognized from a position of the driver in the three-dimensional map information and display the guide image having the obtained shape.