Vehicle Camera Guide Line Overlay Using Precomputed Steering Images
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Solution Overview
Problem
Existing vehicle-mounted camera devices require a calibration computer to adjust guide lines for different steering angles, making it inconvenient to adjust guide lines after changes in camera arrangement or vehicle model without the calibration computer.
Innovation Solution
A vehicle-mounted camera device with a first processor to generate guide line images based on steering angles and a second processor to superpose these images on camera images, allowing for the storage of multiple guide line images in memory for quick retrieval based on current steering angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If guide lines are drawn in real-time based on steering angle, then guide line accuracy is improved, but arithmetic processing load increases
Solution Approach 1:
The patent pre-calculates and stores guide line images for multiple steering angles in memory during a calibration phase. When the vehicle operates, the system simply retrieves the appropriate pre-computed guide line image based on the current steering angle, avoiding real-time arithmetic processing while maintaining accuracy.
Solution Approach 2:
The patent creates multiple copies of guide line images corresponding to different steering angles and stores them in memory. Instead of computing guide lines dynamically, the system copies and displays the appropriate pre-computed guide line image based on the current steering angle, significantly reducing processing load.
2Measurement precision
If calibration computer is used to adjust guide lines, then guide line accuracy is improved, but device complexity increases
Solution Approach 1:
The patent extracts the calibration function from a separate calibration computer and integrates it into the vehicle-mounted camera device itself. The camera device now contains its own calibration parameters and can adjust guide lines independently, eliminating the need for external calibration equipment.
Solution Approach 2:
The vehicle-mounted camera device performs calibration and guide line adjustment autonomously using built-in calibration parameters. The system serves itself by storing calibration data in memory and using it to generate accurate guide lines without requiring external calibration computers or manual intervention.
3Speed
If multiple guide line images are stored in memory, then response speed is improved, but memory usage increases
Solution Approach 1:
The patent stores multiple guide line images in memory, each optimized for specific steering angle ranges. The system selects and displays the appropriate guide line image based on the current steering angle, ensuring fast response while managing memory usage through selective storage of pre-computed images for different operational conditions.
Data Source
AI summary
A vehicle-mounted camera device mounted on a vehicle includes a main core that generates a guide line image including a guide line in accordance with the steering angle of the vehicle, a sub core that superposes a guide line image on a reference image based on the capturing result from a camera mounted on the vehicle, thereby to output the resulting reference image to a display device as a display image, and a memory that holds a plurality of guide line images generated in the main core with respect to a plurality of steering angle. The sub core reads from the memory, in accordance with steering angle information indicating the current steering angle of the vehicle, one of the plurality of guide line images to generate a display image using the read guide line image.