Single Camera Barrier Detection Using Vanishing Point Geometry
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Solution Overview
Problem
Conventional radar and ultrasonic-based parking guidance and assistance systems have limited recognizability and can cause accidents due to their inability to provide accurate 3D views and distance estimation, and they pose health risks with electromagnetic waves. Additionally, multi-camera systems are computationally intensive and difficult to install, while single-camera systems lack 3D view construction and are prone to errors.
Innovation Solution
An image-based barrier detection and warning system using a single camera with a horizontal line detection algorithm, Region Of Interest (ROI) definition, and distance calculation, which processes images to detect barriers and provide timely warnings, replacing conventional systems with image processing and computer vision technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single camera is used for barrier detection, then the system has advantages of high integratability, low price and easy installation, but it cannot construct 3D views and is prone to distance estimation errors
Solution Approach 1:
The patent transforms the 2D image data from a single camera into 3D spatial information by introducing a vanishing point reference system. Horizontal lines in the image are extended to converge at the vanishing point, creating a geometric framework that enables depth perception and accurate distance estimation without requiring multiple cameras. This dimensional transformation allows the single-camera system to achieve 3D view construction capability.
Solution Approach 2:
The patent changes the parameter reference framework by using the vanishing point as a fixed geometric reference instead of relying on multiple camera baselines. By establishing coordinate systems based on vanishing point geometry and using horizontal line extensions, the system transforms image coordinates into real-world distance measurements, improving measurement precision while maintaining single-camera simplicity.
2Measurement precision
If a multi-camera system is used to construct 3D views, then distance estimation accuracy is improved, but the system has disadvantages of high computation amount and inconvenient installation
Solution Approach 1:
The patent extracts and utilizes only the essential geometric features (horizontal lines and vanishing point) from the image data, discarding the need for complex multi-camera baseline measurements and 3D reconstruction algorithms. By focusing on the vanishing point as the key reference element, the system achieves 3D view construction with minimal computational requirements and simplified hardware configuration.
3Difficulty of detecting and measuring
If conventional radar or ultrasonic systems are used for barrier detection, then detection capability is provided, but the electromagnetic wave of radar may harm human beings and recognizability is reduced
Solution Approach 1:
The patent replaces the electromagnetic wave-based radar detection system with an optical image processing system. Instead of using electromagnetic waves that can harm humans, the system uses visible light captured by a camera and processes it through computer vision algorithms. This substitution eliminates the harmful electromagnetic radiation while maintaining barrier detection capability through image-based geometric analysis.
Data Source
AI summary
The present invention discloses an image-based barrier detection and warning system and a method thereof, wherein an image processing technology is used to establish ROI and verify whether a horizontal line signal exists, and wherein the image processing technology determines whether an object is a barrier via detecting contours of an object and detecting distance to the object, and wherein the system timely outputs warning signals and presents distance to a barrier when detecting the barrier. The image-based barrier detection and warning system enables the driver to watch the surroundings of the vehicle directly and clearly and learn the relative positions of barriers, whereby the driver can park more easily and safely.