Dual-Frame Sensor Region Setting for Rearview and Back Monitor Imaging
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Solution Overview
Problem
On-board camera systems face challenges in simultaneously capturing high-resolution rearview mirror images at high frame rates and wide-angle back monitor images without increasing image processing load, as existing technologies are optimized for either requirement but not both effectively.
Innovation Solution
The system employs a single image sensor with two pixel areas set for different frame rates, where the second pixel area operates at a higher frame rate than the first, and the processor configures these areas based on the optical system's characteristics, ensuring the lowest resolution in one area is higher than the other, allowing for high-resolution rearview mirror images and wide-angle back monitor images to be captured efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the camera is optimized for rearview mirror image requirements (high resolution and high frame rate), then the rearview mirror image quality is improved, but the image processing load increases when processing wide-angle back monitor image at the same high frame rate
Solution Approach 1:
The image sensor is divided into two distinct pixel areas: a first pixel area for capturing wide-angle back monitor images and a second pixel area for capturing high-resolution rearview mirror images. This segmentation allows each area to be optimized independently, with the second pixel area dedicated to high-frame-rate high-resolution imaging while the first pixel area handles wide-angle coverage, thereby reducing the overall image processing load while maintaining high quality where needed.
Solution Approach 2:
Different pixel areas are assigned different functional qualities based on their imaging requirements. The second pixel area is configured with higher resolution and higher frame rate capabilities specifically for the rearview mirror image where quality is critical, while the first pixel area operates at lower specifications suitable for wide-angle monitoring, optimizing resource allocation and reducing processing demands.
2Area of stationary object
If the camera is optimized for back monitor image requirements (wide angle of view), then the back monitor image quality is improved, but the high resolution and high frame rate required for rearview mirror image cannot be acquired
Solution Approach 1:
The image sensor is divided into two distinct pixel areas: a first pixel area for capturing wide-angle back monitor images and a second pixel area for capturing high-resolution rearview mirror images. This segmentation allows each area to be optimized independently, with the first pixel area dedicated to wide-angle coverage and the second pixel area configured for high-resolution imaging with higher frame rate capabilities.
Solution Approach 2:
Different pixel areas are assigned different functional qualities based on their imaging requirements. The first pixel area is optimized for wide angle of view to capture the entire back monitor scene, while the second pixel area is configured with higher resolution and frame rate specifically for the rearview mirror image where quality is critical, allowing both requirements to be satisfied simultaneously.
3Device complexity
If a single pixel area is used for both rearview mirror image and back monitor image, then the device complexity is reduced, but it cannot simultaneously achieve high resolution high frame rate for rearview mirror and wide angle for back monitor
Solution Approach 1:
The image sensor is divided into two distinct pixel areas with different functional optimizations. The first pixel area is dedicated to wide-angle back monitor imaging while the second pixel area is optimized for high-resolution high-frame-rate rearview mirror imaging. This segmentation enables the single sensor to simultaneously fulfill multiple imaging requirements that would be impossible with a uniform pixel area configuration.
Solution Approach 2:
A single image sensor is designed to perform multiple functions by incorporating different pixel areas with different characteristics. The sensor can simultaneously capture wide-angle back monitor images and high-resolution rearview mirror images at different frame rates, making it a multi-functional device that replaces what would traditionally require separate specialized sensors.
Data Source
AI summary
An imaging setting apparatus sets, among a first pixel area for signal readout at a first frame rate on a single image sensor configured to capture an object image formed by a single optical system, and a second pixel area for signal readout at a second frame rate higher than the first frame rate, at least the second pixel area. The optical system has a characteristic such that resolution, which is a pixel number of the object image on the image sensor per unit angle of view, is different according to the angle of view, the second pixel area is set such that lowest resolution in one of the first pixel area and the second pixel area is higher than lowest resolution in the other of the first pixel area and the second pixel area.