Universal Imager Interface for Vehicle Vision Systems
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Solution Overview
Problem
Current vehicle vision systems lack a unified imager interface compatible with both 8-bit MIPI-CSI2 and 12-bit parallel data formats, limiting the flexibility and compatibility of camera systems in vehicle imaging applications.
Innovation Solution
A vehicle vision system that incorporates a single imager interface on the same board, compatible with both 8-bit MIPI-CSI2 and 12-bit parallel data formats, connected to an image processing chip like EyeQ4, enabling efficient image data processing and object detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single imager interface is designed to support both 8-bit MIPI-CSI2 and 12-bit parallel data formats, then compatibility and versatility are improved, but device complexity increases
Solution Approach 1:
The imager interface is designed as a universal interface capable of operating in multiple modes: 8-bit MIPI-CSI2 mode for high-speed applications and 12-bit parallel mode for high-precision applications. The interface includes configurable data buses and control logic that can be programmed to support either protocol, eliminating the need for separate dedicated interfaces for each data format.
Solution Approach 2:
The interface incorporates dynamic configuration capabilities where the operating mode (MIPI-CSI2 or parallel) can be changed at runtime based on the specific application requirements. This is achieved through programmable control registers and configurable data path width that can be adjusted without hardware changes, allowing the system to adapt to different imaging scenarios.
2Measurement precision
If high-resolution image data is transmitted using 12-bit parallel format, then image quality is improved, but data transfer bandwidth requirements increase
Solution Approach 1:
The system dynamically adjusts data transmission parameters based on application needs. When high precision is required, the interface operates in 12-bit parallel mode with appropriate bus width configuration. When bandwidth is more critical than precision, the system can switch to 8-bit MIPI-CSI2 mode with compression algorithms, thereby optimizing the balance between image quality and data transfer requirements.
3Adaptability or versatility
If multiple camera systems with different interfaces are integrated, then system versatility is improved, but integration complexity and board space increase
Solution Approach 1:
The camera integration system employs a universal imager interface that can accommodate multiple camera types through software configuration rather than requiring separate dedicated interfaces. The interface includes a camera identification and configuration module that automatically detects the connected camera type and configures the appropriate transmission mode, reducing the number of physical interface circuits needed on the board.
Data Source
AI summary
A vision system for a vehicle includes a camera disposed at a vehicle and having a field of view exterior and forward of the vehicle. The camera includes an imager and a lens. The imager captures image data. The camera includes an imager interface disposed on a circuit board that is compatible with one or both of 8-bit MIPI-CSI2 and 12-bit parallel. The imager interface is connected to an image processor that processes image data captured by the imager.