Stereo Camera Displacement Correction via Enclosure Reference
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Solution Overview
Problem
Vehicle-mounted stereo camera devices face challenges in maintaining precise distance measurement due to camera positional displacements caused by factors like aging, temperature changes, and vibrations, which affect the accuracy of distance detection.
Innovation Solution
The device includes a first and second image capturing unit with overlapping visual fields, enclosures that reflect within these fields to detect displacement, and a controller that calculates and corrects the cutout positions in the images captured by these units based on detected displacement amounts, ensuring accurate distance measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If camera positional displacement is not corrected, then the device structure remains simple, but distance measurement precision deteriorates over time due to aging, temperature changes, and vibrations
Solution Approach 1:
The patent implements feedback by detecting the actual positional displacement of image capturing units using enclosure positions visible in captured images, then using this detected displacement information to correct cutout positions in subsequent images. This closed-loop feedback mechanism maintains measurement precision without requiring complex mechanical stabilization structures.
Solution Approach 2:
The patent replaces complex mechanical stabilization systems with an information-based correction approach. Instead of using mechanical devices to physically stabilize or reposition cameras, the system captures displacement information through image analysis and corrects positional data computationally, significantly reducing mechanical complexity.
2Measurement precision
If enclosure positions are used to detect camera displacement, then distance measurement accuracy is maintained, but the device requires additional structural components
Solution Approach 1:
The patent makes the enclosure serve multiple functions: it acts as both a protective housing for the image capturing unit and as a reference object for detecting camera displacement. By capturing images of the enclosure and analyzing the enclosure's position changes in the image sequence, the system derives displacement information without requiring separate detection devices.
Solution Approach 2:
The system uses itself to detect its own displacement. The image capturing units capture images of the enclosures that surround them, and by analyzing the relative positions of these enclosures in the captured images, the system self-diagnoses its own positional changes and corrects accordingly, eliminating the need for external reference systems.
Data Source
AI summary
A vehicle-mounted stereo camera device that achieves high-precision distance detection is provided, including a left camera and a right camera disposed to cause visual fields to overlap each other, a first enclosure and a second enclosure that enclose the left camera and the right camera and have portions within the visual fields of the left camera and the right camera, respectively, and a stereo processor that calculates a distance to a body outside the vehicle based on images captured by the left camera and the right camera and on positions of the left camera and the right camera on the vehicle. The stereo processor detects displacement amounts of the left camera and the right camera based on amounts of change in positions of the first enclosure and the second enclosure within the visual fields of the left camera and the right camera, and changes a cutout position in the images captured by the left camera and the right camera.