Image Acquiring Apparatus Angular Calibration for Vehicle Collision Warning
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Solution Overview
Problem
Current collision warning systems rely on inaccurate estimation of the installed angle of image acquiring apparatuses, which affects the precision of relative distance calculation between vehicles, leading to increased accident rates due to inadequate warning systems.
Innovation Solution
A method for determining the installed angle of an image acquiring apparatus using a calibrating tool and iterative calculations, allowing for accurate angle determination without vehicle movement, enabling precise relative distance estimation and timely alarm generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional techniques are used to determine the installed angle of the image acquiring apparatus, then the system can provide basic collision warning functionality, but the accuracy of relative distance estimation deteriorates due to angle estimation errors
Solution Approach 1:
The patent replaces manual or mechanical angle measurement methods with an automated image processing system. The image acquiring apparatus captures images of the calibrating tool, and the system automatically calculates the installed angle through coordinate system transformation and iterative computation, eliminating manual measurement errors and improving both angle measurement accuracy and overall system reliability
Solution Approach 2:
The patent uses a calibrating tool with known geometric features (lines, circles, or chessboard patterns) that creates a reproducible reference image. By capturing and analyzing this standardized pattern, the system creates a reliable reference frame for angle determination, ensuring consistent and accurate measurements across different installations and conditions
2Measurement precision
If the vehicle is moved on roadway to obtain accurate angle information, then the installed angle can be determined more accurately, but the time consumption and operational complexity increase
Solution Approach 1:
The patent performs angle calibration using a static image of a calibrating tool placed in the field of view, eliminating the need for vehicle movement during calibration. The system processes the captured image through coordinate transformation and iterative calculation to determine the installed angle, completing the calibration process immediately without requiring roadway movement or additional time-consuming procedures
Solution Approach 2:
The system performs self-calibration by automatically processing the captured image of the calibrating tool through image processing algorithms. The computer executes coordinate system transformation and iterative angle calculation without human intervention, determining the installed angle autonomously and reducing both time consumption and operational complexity
3Device complexity
If manual measurement methods are used for angle determination, then the system structure remains simple, but the operational complexity and potential for human error increase
Solution Approach 1:
The patent replaces manual angle measurement operations with automated image processing and computational algorithms. The system captures an image of the calibrating tool, transforms coordinates between image and spatial reference systems, and iteratively calculates the installed angle, eliminating manual measurement steps and associated human errors while maintaining streamlined operation through automated processing
Solution Approach 2:
The system uses a standardized calibrating tool with known geometric patterns that creates a reproducible digital reference. By capturing and processing this standardized image copy, the system establishes a reliable reference frame for angle determination, simplifying the calibration operation to merely positioning the tool and executing the automated calculation process
Data Source
AI summary
The invention provides a method for determining the angular magnitude of an imaging acquiring apparatus, which is capable of obtaining an arranging angular magnitude with respect to the imaging acquiring apparatus in various environments by an iteration algorithm having parameters of position of a calibrating tool with respect to an image coordinate system and characteristic value corresponding to a spatial coordinate system respectively. Meanwhile, the present further provides a vehicle collision warning system which functions to obtain the relative distance between the carrier and objects around according to the image acquired by the imaging acquiring apparatus and the angular magnitude and height of the imaging acquiring apparatus. By means of the method disclosed in the present invention, the procedure to detect the angular magnitude of the image acquiring apparatus is more convenient and accurate such that the convenience for using the vehicle collision warning system is capable of being improved.