Synthetic Vision System Terrain Display Scintillation Reduction
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Solution Overview
Problem
Synthetic vision systems in vehicles often suffer from low refresh rates due to computational platform compromises, leading to display flickering and reduced utility of information, especially in providing clear and intuitive views of terrain features.
Innovation Solution
The method involves automatically determining a vehicle's position and orientation with respect to terrain, using stored images from databases, and processing these images to reduce scintillation, incorporating real-time local features and TCAS information, to provide a high-resolution, intuitive synthetic view without executable program instructions, thus avoiding flickering and enhancing display clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a computational platform is selected to support synthetic vision processing, then the system can provide terrain information to the driver, but display flickering occurs due to low refresh rates
Solution Approach 1:
The system pre-processes and stores terrain images in databases before they are needed during flight. The synthetic vision system retrieves pre-computed images and combines them with detected local features, eliminating the need for real-time complex computations and enabling high refresh rates without flickering.
Solution Approach 2:
The system uses stored copies of terrain images from databases rather than generating images in real-time. By retrieving pre-computed terrain data and combining it with current local feature detections, the system achieves high refresh rates while maintaining display stability.
2Loss of information
If stored terrain information is used to provide synthetic vision, then the system can display terrain features, but the information may not be sufficiently clear or intuitive
Solution Approach 1:
The system combines stored terrain information with locally detected features specific to the current viewing conditions. By detecting local features such as buildings, trees, and other distinctive elements and integrating them with the synthetic terrain background, the system creates a customized view that is both clear and intuitive for the specific local environment.
Solution Approach 2:
The system continuously detects local features in the real-time environment and uses this feedback to adjust and enhance the synthetic vision display. By comparing detected local features with the stored terrain information, the system dynamically refines the display to improve clarity and intuitiveness.
3Manufacturing precision
If high-resolution images are processed in real-time, then display clarity improves, but computational complexity and cost increase
Solution Approach 1:
High-resolution terrain images are pre-processed and stored in databases before flight operations. The system retrieves these pre-computed high-resolution images and combines them with real-time local feature detections, achieving high display resolution without requiring complex real-time computational processing.
Solution Approach 2:
The system uses stored copies of high-resolution terrain images rather than generating them in real-time. By retrieving pre-computed high-resolution data and combining it with current local feature detections, the system achieves high display resolution while reducing computational complexity during actual operation.
Data Source
AI summary
Specific determinations are made in a moving vehicle (901) and with respect to a person in the vehicle who has an ordinary expected gaze directionality while in the moving vehicle. These determinations can comprise automatically determining a position (101) of the moving vehicle with respect to terrain past which the moving vehicle is traveling, and automatically determining an orientation attitude (102) of the moving vehicle with respect to the terrain, and then automatically using (103) this position and orientation attitude to determine (in the absence of executable program instructions) a synthetic view to provide to the person in the vehicle. By one approach this synthetic view comprises a view of the terrain that comports with the ordinary expected gaze directionality of the person in the vehicle.