Rear-Camera Blind-Spot Monitoring With Distance and Speed Estimation
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Solution Overview
Problem
Existing blind-spot view monitors using side cameras struggle to accurately determine the distance and speed of approaching vehicles, making it difficult for drivers to assess collision risks and necessitate additional manual checks during lane changes.
Innovation Solution
A blind spot monitoring apparatus utilizing a rear camera with asymmetric lens distortion correction and an ultrasonic sensor to calculate distance and relative speed, generating an adjusted image with guide lines and warning indicators, and providing automatic collision warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a side camera is used to provide blind spot images, then the driver can see the rear blind spot area, but the distance and speed of approaching vehicles cannot be accurately determined
Solution Approach 1:
The patent combines multiple sensors (side cameras, rear cameras, ultrasonic sensors, radar) to create a comprehensive blind spot monitoring system. This merging of different sensing modalities allows the system to simultaneously achieve blind spot visibility and accurate distance/speed measurement, resolving the contradiction between information completeness and measurement precision.
Solution Approach 2:
The patent introduces intermediate processing components including image processing units that apply asymmetric lens distortion correction, distance calculation modules using ultrasonic sensors, and speed estimation algorithms. These intermediaries transform raw sensor data into accurate distance and speed measurements, enabling precise quantification of approaching vehicles while maintaining blind spot coverage.
2Reliability
If manual checking is performed to assess collision risk, then the driver can evaluate the situation, but the driving process becomes inconvenient and time-consuming
Solution Approach 1:
The blind spot monitoring system performs self-service by automatically detecting approaching vehicles, calculating distances and speeds, and assessing collision risks without requiring driver intervention. The system uses onboard sensors and processors to independently evaluate safety conditions and provide warnings, eliminating the need for manual checking while maintaining reliable collision risk assessment.
Solution Approach 2:
The patent implements feedback mechanisms where the system continuously monitors blind spot areas, processes sensor data, and provides real-time warnings to the driver through visual or audible alerts. This closed-loop feedback system automatically communicates collision risk assessments to the driver, maintaining safety reliability while preserving driving convenience by eliminating manual evaluation steps.
3Area of stationary object
If a rear camera with asymmetric lens distortion is used, then the blind spot area can be captured, but the image requires complex adjustment to be useful
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction parameters for asymmetric lens distortion. The image processing system applies these predetermined corrections to rear camera images, transforming distorted blind spot views into geometrically accurate representations. This preliminary preparation of correction data reduces real-time processing complexity while maintaining comprehensive blind spot coverage.
Data Source
AI summary
The present disclosure provides apparatus and method for blind-spot monitoring of vehicle based on rear camera. A blind spot view monitoring apparatus, for a vehicle based on a rear camera, may include an image acquisition unit, a control unit and a display unit. The image acquisition unit is configured to obtain a rear image from a rear camera mounted on a vehicle. The control unit is configured to set a region of interest in the rear image based on a turn signal or a lane departure signal of the vehicle, to determine whether there is a risk of proximity of an object in the region of interest to the vehicle, and to generate a blind spot image based on whether there is the risk of proximity. The display unit is configured to display the blind spot image.