Camera System Image Partitioning for ADAS
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Solution Overview
Problem
Existing driver assistance systems face challenges in integrating multiple functions like lane departure warning, traffic sign recognition, and automatic high-beam control on a single hardware platform, requiring different camera settings and sensitivity levels that are not optimally met by current technologies.
Innovation Solution
A method and system that partitions image frames into different exposure and gain settings to optimize each driver assistance function, using a patterned color filter with a CYM (Cyan, Yellow, Magenta) focal plane filter to enhance sensitivity and accuracy for lane departure warning and traffic sign recognition, while allowing for automatic high-beam control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single camera hardware platform is used for multiple driver assistance functions, then device complexity is reduced, but measurement precision and sensitivity cannot be optimized for each specific function
Solution Approach 1:
The patent segments the image processing by dividing the image frame into multiple regions of interest (ROI), each optimized for specific driver assistance functions. Different processing algorithms and parameters are applied to different ROIs, allowing lane departure warning, traffic sign recognition, and forward collision warning to each receive specialized processing while using a single camera platform.
Solution Approach 2:
The patent implements local quality optimization by applying different processing qualities and parameters to different spatial regions of the image. For example, higher resolution processing is applied to regions containing lane markers, while different processing is applied to regions containing traffic signs or vehicles, thereby optimizing detection accuracy for each function without requiring multiple cameras.
2Measurement precision
If different camera settings and sensitivity levels are used for each driver assistance function, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic adjustment of camera parameters such as exposure time, gain, and focus based on the detected scene content and lighting conditions. The system dynamically switches between different processing modes for different driver assistance functions, allowing optimal detection accuracy without requiring multiple fixed-configuration cameras.
Solution Approach 2:
The patent changes processing parameters dynamically based on the specific driver assistance function being performed and the current environmental conditions. Different exposure times, gain levels, and processing algorithms are applied as needed for lane departure warning, traffic sign recognition, or forward collision warning, all within a single camera system.
3Measurement precision
If a forward-looking camera is positioned to capture road markings, then lane departure warning is improved, but visibility of the road close to the vehicle is limited by the car hood
Solution Approach 1:
The patent compensates for the limited visible road area by using predictive algorithms that extrapolate lane marker positions based on detected markers further ahead. The system uses the known geometry of lane markers and vehicle motion to predict the position of markers that are currently obscured by the hood, thereby extending the effective detection range.
Solution Approach 2:
The patent performs preliminary detection of lane markers at distances where they are visible above the hood, then uses this information to predict and prepare for upcoming lane changes or departures. The system anticipates future lane marker positions based on current detection and vehicle trajectory, allowing lane departure warning functionality despite limited immediate visibility.
Data Source
AI summary
A camera mount for mounting a camera inside a windshield of a vehicle. The camera includes a lens mount and a camera housing. The front tip of the lens mount is constrained to be in close proximity to or constrained to contact the inside of the windshield for different rake angles of the windshield.