Vehicle Surround View Display With Slip-Aware Underfloor Imaging
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Solution Overview
Problem
Existing peripheral image display devices for vehicles face reliability issues due to erroneous image display when wheels are in a slip state, leading to misunderstandings of the underfloor situation, and require significant processing load for image processing techniques like optical flow.
Innovation Solution
A peripheral image display device that acquires wheel speeds, determines slip states, and synthesizes camera images to display a transparent image of the vehicle's underfloor only in non-slip states, deactivating the display in slip states to prevent erroneous images, thereby reducing processing load and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image processing techniques like optical flow are used to estimate vehicle movement, then the underfloor situation can be displayed, but the processing load becomes significant
Solution Approach 1:
The patent extracts the essential function of displaying underfloor situation by using only wheel speed data and simple image selection logic, removing the complex optical flow processing while maintaining the core display functionality. This reduces processing load significantly while still providing useful underfloor visualization.
Solution Approach 2:
The patent uses simple, computationally inexpensive methods for image generation and selection based on wheel speed data, replacing complex real-time image processing with a simpler approach that selects from pre-captured images based on calculated movement distance, thereby reducing processing requirements.
2Device complexity
If wheel speed data is used to estimate vehicle movement, then processing load is reduced, but erroneous images are displayed when wheels are in slip state
Solution Approach 1:
The patent introduces feedback by continuously monitoring wheel speed data to detect slip states, and uses this information to control whether transparent image display is activated. When slip is detected, the system feedback-adjusts the display mode to prevent showing erroneous images, thereby maintaining reliability while using simple processing.
Solution Approach 2:
The patent makes the transparent image display dynamic by adjusting its activation state based on real-time wheel slip detection. The system transitions between displaying transparent images and standard images based on the detected wheel state, ensuring accuracy adapts to changing driving conditions without requiring complex processing.
3Ease of operation
If transparent image display is always activated, then underfloor visibility is improved, but misleading images may be shown during slip state
Solution Approach 1:
The patent applies local quality by providing enhanced underfloor visibility (transparent image display) only in the specific condition where it is reliable (non-slip state). When wheel slip is detected, the system removes the transparent display feature locally, ensuring that visibility enhancement is applied only where it does not compromise image accuracy.
Data Source
AI summary
A peripheral image display device is configured to: acquire wheel speeds of a vehicle; determine a slip state or a non-slip state of a wheel of the vehicle based on the acquired wheel speeds; acquire multiple camera images from respective cameras; store, as a past image, the camera image indicating a range in a traveling direction of the vehicle; generate a peripheral image indicating a periphery of the vehicle by synthesizing the camera images, display the peripheral image on a display. In the non-slip state, the peripheral image display device displays a transparent image showing, in a transparent manner, a portion under a floor of the vehicle using the past image selected based on current wheel speeds is. In the slip state, the peripheral image display device deactivates the display of the transparent image.