Vehicle Camera Capturing Face and License Plate Images
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Solution Overview
Problem
Existing camera systems fail to capture high-quality images of both the face of a person riding in a vehicle and the vehicle's license plate, especially under varying exposure conditions, leading to deteriorated image quality.
Innovation Solution
A capturing camera system with a lens block, image sensor, and processor that focuses light from the subject, performs multiple capturing processes, and generates high-quality images of the face and license plate by adjusting exposure conditions and using polarization and band pass filters to optimize image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single exposure condition is used to capture both the windshield and license plate, then the capturing process is simple, but the image quality of certain parts deteriorates
Solution Approach 1:
The patent divides the capturing process into multiple exposure conditions (first exposure condition for windshield, second exposure condition for license plate). The processor separately generates windshield images and license plate images based on different exposure settings, then combines them. This segmentation allows each region to be captured with optimal exposure, resolving the contradiction between simple capturing process and high image quality.
2Manufacturing precision
If multiple capturing conditions are used to improve image quality, then high-quality images of face and license plate are generated, but the capturing process complexity increases
Solution Approach 1:
The patent merges multiple captured images taken under different exposure conditions into a single composite image. The processor combines the windshield image (captured under first exposure condition) and license plate image (captured under second exposure condition) into one integrated output. This merging approach maintains high image quality for both regions while managing the complexity through automated processing.
3Manufacturing precision
If polarization filters are used to reduce glare on windshield, then windshield visibility improves, but light transmission is reduced
Solution Approach 1:
The patent changes the exposure parameters (exposure time, gain, or shutter speed) when capturing images under different conditions. By adjusting these parameters, the system compensates for the reduced light transmission caused by polarization filters, ensuring that the windshield image quality is improved through glare reduction while maintaining sufficient brightness through optimized exposure settings.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively generates high-quality images of both the face and license plate, supporting data correlation between the person and vehicle, while adapting to different vehicle types and lane positions.
Implementation Method 1
a lens block that includes a lens for focusing light from a subject including a face of a person riding in a vehicle and a license plate of the vehicle
Implementation Method 2
a polarization filter that transmits only light having one direction is provided on the light emitting side of an illumination device
Data Source
AI summary
A capturing camera has a lens block that includes a lens for focusing light from a subject including a face of a person riding in a vehicle and a license plate of the vehicle, an image sensor that performs a capturing process based on the light from the subject focused by the lens, and a processor that generates a face image of the person riding in the vehicle and a license plate image of the vehicle, corresponding to a same vehicle, based on a captured image of the subject generated by the capturing process. The processor has the image sensor perform the capturing process using a plurality of capturing conditions at a time of capturing based on the light from the subject.