Rearview Display Parallax Adjustment for Driver Head Movement
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Solution Overview
Problem
Drivers experience motion sickness and disorientation when using vehicles with camera "mirrors" due to static camera feeds that do not align with head movements.
Innovation Solution
Implementing eye tracking in a camera-based mirror system to dynamically adjust the camera feeds based on the driver's head position, creating a "parallax" effect that mimics a real mirror and provides a basic 3D illusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If camera feeds are made static to simplify the system, then device complexity is reduced, but driver motion sickness and disorientation increase due to disconnect between head position and visual feedback
Solution Approach 1:
The camera feed system transitions from static to dynamic by continuously adjusting the displayed image based on detected head position. The system captures head position data, calculates appropriate image adjustments, and dynamically modifies the camera feed display to maintain proper alignment, thereby eliminating motion sickness while preserving system simplicity through automated control.
Solution Approach 2:
The system implements a feedback loop where head position is continuously monitored, the displayed image is adjusted based on this position data, and the adjustment is immediately reflected in the camera feed. This closed-loop feedback ensures the visual output remains aligned with the driver's actual viewing position, preventing disorientation without requiring complex manual calibration.
2Object-affected harmful factors
If dynamic head position tracking is implemented to reduce motion sickness, then driver comfort improves, but device complexity increases due to additional sensors and processing requirements
Solution Approach 1:
The camera system serves multiple functions: it captures the rearview scene for display and simultaneously tracks head position by analyzing the driver's face and eye region. This multi-functionality eliminates the need for separate dedicated head-tracking sensors, reducing overall system complexity while still providing dynamic adjustment capabilities to prevent motion sickness.
Solution Approach 2:
The system uses the existing camera hardware to perform dual tasks - capturing the rearview image and detecting head position. By processing the same visual data for multiple purposes, the system avoids adding separate sensing components and keeps the processing requirements manageable, achieving driver comfort without excessive complexity.
3Ease of operation
If camera feeds are adjusted to match head movements, then viewing experience becomes more natural and intuitive, but processing complexity increases due to real-time image modification requirements
Solution Approach 1:
The image processing is divided into discrete computational steps: detecting head position from camera data, calculating the required adjustment based on position change, and applying the adjustment to the displayed image. This segmentation of the processing task into manageable stages reduces computational complexity while maintaining real-time performance and natural viewing experience.
Data Source
AI summary
A rearview display arrangement for a motor vehicle includes an eye tracking camera capturing images of a face of a driver of the motor vehicle. A rearview camera captures first images of a scene behind the motor vehicle. A rearview display is mounted in a passenger compartment of the motor vehicle and displays second images based on the first images. An electronic processor is communicatively coupled to the eye tracking camera, to the rearview camera, and to the rearview display. The electronic processor determines locations of eyes of the driver based on the captured images of the face of the driver, and modifies the displayed second images dependent upon the determined locations of the eyes of the driver.