Stereo Camera Segmentation for Wide-Angle Detection Accuracy
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Solution Overview
Problem
Conventional stereo image capture apparatuses face challenges in securing high detection accuracy at wide angles while maintaining system size and cost efficiency, as wider fields of view lead to increased processing loads and errors due to the need for larger image correction amounts and lower angular resolution.
Innovation Solution
The apparatus employs a configuration with two cameras, partitioning the image capture region into telephoto and wide-angle regions, using central projection in the telephoto region for higher angular resolution and equidistant projection in the wide-angle region, reducing distortion and image correction needs, and optimizing lens distortion characteristics to minimize processing resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the field of view is set wider, then the detection range is improved, but the detection accuracy at the far side in telephoto region deteriorates
Solution Approach 1:
The image capture region is divided into two distinct regions: a telephoto region captured by a first camera and a wide-angle region captured by a second camera. This segmentation allows each camera to be optimized for its specific region, with the telephoto camera providing high accuracy for distant objects and the wide-angle camera providing broad coverage for nearby objects, thereby resolving the contradiction between wide field of view and far-side detection accuracy.
2Measurement precision
If the detection accuracy at the far side is prioritized, then the measurement precision is improved, but the processing load increases too much
Solution Approach 1:
By segmenting the monitoring task into two separate camera systems focused on different regions, the processing load is distributed and reduced. Each camera processes only the region it captures, avoiding the need to process entire high-resolution images for both wide-angle and telephoto views, thus maintaining high detection accuracy while reducing overall processing requirements.
Solution Approach 2:
The patent extracts the telephoto function from the wide-angle camera system by introducing a dedicated first camera for the telephoto region. This extraction allows the wide-angle camera to focus solely on broad coverage without the computational burden of maintaining high accuracy across the entire field of view, thereby reducing processing load while preserving detection accuracy where needed.
3Measurement precision
If the measurement accuracy at the far side is prioritized, then the detection precision is improved, but the system cost and system size increase
Solution Approach 1:
The monitoring system is segmented into two specialized camera units, each optimized for specific regions. This segmentation allows the use of smaller, more cost-effective camera sensors compared to using a single large high-resolution camera, thereby achieving high measurement accuracy at the far side while controlling system size and cost.
Data Source
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AI summary
A stereo image capture apparatus (100) includes a first image capture device (23), a second image capture device (23), a first optical system (21) configured to divide image data to be captured by the first image capture device (23) into a telephoto region and a wide-angle region, a second optical system (21) configured to divide image data to be captured by the second image capture device (23) into a telephoto region and a wide-angle region, and a processor (28, 30) configured to perform image processing on the image data captured by the first image capture device (23) and the image data captured by the second image capture device (23) according to the telephoto region and the wide-angle region.