Parking Assistance Target Positioning With Virtual Frame-Line Extension
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Solution Overview
Problem
In the tilt parking mode, existing technologies face challenges in accurately recognizing and displaying the target parking position due to limitations in camera tilt angles and HMI display ranges, leading to reduced recognition accuracy and driver anxiety.
Innovation Solution
The system includes an external field recognition unit, an information holding unit, a parking region extraction unit, a parking position determination unit, and a path calculation unit. In cases where part of the parking frame line is not recognized, the target parking position is determined based on lines connecting the end point of the parking frame line on the rear side of the vehicle, a virtually extending line of the parking frame line on the front side, and an intersection point, allowing accurate determination without altering the camera tilt angle or HMI display range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the camera tilt angle is increased to expand the recognition range, then the display range of the HMI can be covered, but the recognition accuracy of the parking frame line deteriorates
Solution Approach 1:
The patent introduces virtual extension lines that extend beyond the camera's physical recognition range. By projecting the detected parking frame line endpoints along the line direction to create virtual intersection points, the system effectively expands the recognition dimension from the limited camera field of view to a broader spatial context, enabling target parking position determination without requiring the camera to physically capture the entire parking frame.
Solution Approach 2:
The patent uses virtual extension lines as an intermediary element to bridge the gap between the camera's limited recognition range and the required target parking position. These virtual lines serve as a mathematical construct that connects detected frame line segments to potential parking positions, allowing the system to determine target positions even when the complete parking frame is not visible in the camera view.
2Measurement precision
If the camera tilt angle is reduced to improve recognition accuracy, then the parking frame line can be recognized more accurately, but the recognition range is narrowed
Solution Approach 1:
The patent compensates for the limited camera recognition range by introducing virtual extension lines that mathematically extend the detection boundary. This dimensional extension allows the system to maintain a comfortable camera tilt angle for accurate frame line recognition while still determining target parking positions that lie beyond the physical camera view through geometric projection.
3Area of stationary object
If the HMI display range is expanded to show more parking information, then the driver can see more parking candidates, but the camera must be tilted more which reduces recognition accuracy
Solution Approach 1:
The patent creates virtual copies of the parking frame line by extending the detected line segments mathematically. These virtual extensions are then used to calculate target parking positions that can be displayed on the HMI without requiring the camera to physically capture all potential parking positions, thus maintaining recognition accuracy while expanding display capabilities.
4Measurement precision
If the driver approaches the parking frame at a short distance to improve recognition, then the camera can capture the parking frame, but the driver feels anxiety in the parking lot
Solution Approach 1:
The patent performs preliminary determination of the target parking position using virtual extension lines before the vehicle actually approaches the parking frame. By calculating the target position based on extended line intersections rather than requiring close proximity detection, the system enables the driver to maintain a comfortable distance while still achieving accurate target position determination.
Data Source
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AI summary
In a tilt parking mode, "a target parking position" can be accurately determined without changing a camera tilt angle and an HMI display range, and can be notified to a driver, so that the usability can be improved. A parking support device includes an external field recognition unit such as a camera and a sonar, which recognizes an external field, an information holding unit which holds information of a parking frame line recognized by the external field recognition unit, a parking region extraction unit which extracts a parking region from information of the parking frame line, a parking position determination unit which determines a target parking position from the parking region, and a path calculation unit which calculates a parking path from a current position of an own vehicle up to the target parking position. In a case where part of the parking frame line is not recognized by the camera, the target parking position is defined on the basis of lines connecting an end point of the parking frame line on a rear side of the own vehicle, a virtually extending line of the parking frame line on a front side of the own vehicle, and a point intersecting with the virtual line on a front side of the vehicle from the end point of the parking frame line on the rear side of the own vehicle.