Vehicle Bird's-Eye Display Using Wheel Motion and Skid Detection
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Solution Overview
Problem
Existing display processing devices require high computational costs and struggle with image matching processing, especially when a target object is not present in the joint portion, leading to inaccurate movement calculations and difficulties in displaying underfloor spaces of traveling vehicles.
Innovation Solution
A display processing device equipped with a hardware processor that generates a bird's-eye view image by combining past and real-time images, estimates vehicle movement based on wheel rotation, and detects skid phenomena to adjust the display image, reducing the need for costly image matching techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image matching processing is performed by comparing multiple images to correct shift at joints, then display accuracy is improved, but computational cost increases enormously
Solution Approach 1:
The patent extracts the essential movement information by using only wheel rotation data to calculate vehicle movement amount, rather than comparing multiple images. This extracts the core needed information (movement amount) from a single data source (wheel rotation) instead of processing multiple images, thereby reducing computational cost while maintaining display accuracy
Solution Approach 2:
The patent introduces wheel rotation data as an intermediary to indirectly obtain vehicle movement amount. Instead of directly comparing images to find movement, the system uses wheel rotation as a mediator to calculate movement amount, which then serves as the basis for generating past images and correcting display shifts
2Reliability
If image matching processing is performed to correct movement calculation errors, then display reliability is improved, but device complexity increases
Solution Approach 1:
The system uses the vehicle's existing wheel rotation detection capability to self-calculate its movement amount. This self-service approach eliminates the need for external image matching processing, reducing device complexity while maintaining reliability through the use of reliable wheel rotation data that is already being collected by the vehicle's sensors
3Measurement precision
If multiple past images are generated and combined with real-time images, then underfloor space display quality is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary action by pre-calculating the movement amount based on wheel rotation data before generating past images. This preliminary calculation of movement amount allows for efficient generation of past images without requiring time-consuming image matching processing during the actual display update, thereby reducing processing time while maintaining display quality
Data Source
AI summary
A display processing device is installed in a vehicle. The display processing device includes a hardware processor coupled to a memory. The processor acquires an image obtained by capturing a periphery of the vehicle and generates a bird's-eye view image of the periphery of the vehicle. The processor estimates a movement amount of the vehicle and generates past images whose capturing times are past time points. The past images are generated on the basis of the movement amount of the vehicle and a past bird's-eye view image. The processor generates a display image to be displayed on a display device in the vehicle by combining the past images and the bird's-eye view image. When occurrence of a skid phenomenon of the wheel is detected, the processor generates the display image by performing, on the past images, processing indicating that the skid phenomenon has occurred.