Vehicle Camera Vanishing-Point Detection for Mounting Error Correction
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Solution Overview
Problem
Installation errors in vehicle cameras can cause deviations in the actual imaging area and affect the accuracy of auxiliary image positioning and distance measurement, leading to malfunctions in driving assist and automated driving functions.
Innovation Solution
A signal processing device that includes a vanishing point estimation unit to analyze surrounding images and an attachment detection unit to determine the posture of imaging devices, correcting image distortions and measuring distances based on estimated vanishing point positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If camera installation angle is adjusted to expand imaging area coverage, then the imaging area coverage is improved, but the installation precision deteriorates leading to deviation between actual and original imaging areas
Solution Approach 1:
The patent replaces mechanical adjustment methods with image processing algorithms. By detecting the vanishing point position in captured images and calculating deviation from the reference vanishing point, the system computationally determines installation angle errors and compensates for them through image processing, eliminating the need for precise mechanical installation adjustment
Solution Approach 2:
The patent changes the approach from adjusting physical installation parameters (mechanical angle) to adjusting image processing parameters. The vanishing point position and its deviation are used as parameters to dynamically calculate correction values for image processing, allowing flexible compensation without mechanical re-adjustment
2Measurement precision
If vanishing point estimation is performed to detect installation errors, then the installation error detection capability is improved, but the image processing complexity increases
Solution Approach 1:
The patent extracts only the essential feature (vanishing point) from the entire image for analysis. By focusing computational resources on detecting this single key geometric feature rather than analyzing all image content, the system achieves high detection precision while maintaining relatively simple processing complexity
Solution Approach 2:
The patent uses the vanishing point as a simplified copy or representation of the entire camera installation state. Instead of analyzing complex multi-dimensional installation parameters, the system captures the installation error information contained in the vanishing point position, reducing processing complexity while preserving detection precision
Data Source
AI summary
There is provided a technology advantageous for detecting an installation error of an imaging device in a mobile object.The present disclosure relates to a signal processing device including: a vanishing point estimation unit that acquires a surrounding image captured by an imaging device including an optical system which has an optical axis non-parallel to a moving direction of the imaging device and estimates estimated vanishing point position information indicating a position of a vanishing point by analyzing the surrounding image; and an attachment detection unit that acquires imaging attachment information indicating an attachment posture of the imaging device on the basis of the estimated vanishing point position information and reference vanishing point position information indicating a position of a reference vanishing point.