Electronic Rearview Mirror Image Rotation and Display Area Adjustment
Solution Overview
Problem
Existing electronic rearview mirrors with camera monitoring systems face difficulties in accurately adjusting the display area to the desired position due to installation errors, leading to tilted or obliquely moved images, making it challenging for drivers to achieve the intended view.
Innovation Solution
The electronic rearview mirror system includes an image display apparatus that allows for precise adjustment of the display area within the image data by moving it vertically or horizontally within the rotated image, ensuring the display area is moved only in the intended direction without additional oblique movements, using a process that involves image rotation and movement correction based on predefined operations and coordinate systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the imaging device is installed on the vehicle, then rearward vision monitoring is enabled, but installation errors cause the captured image to be rotated and tilted
Solution Approach 1:
The system performs preliminary rotation correction of the captured image data before displaying it. The image processing unit detects the rotation angle of the captured image and rotates the image data in the opposite direction to correct the tilt, ensuring the displayed image is properly oriented without requiring precise installation of the imaging device
2Ease of operation
If the display area is adjusted in the electronic rearview mirror, then the driver can change the view direction, but the display area moves obliquely instead of vertically or horizontally as intended
Solution Approach 1:
The system creates a virtual copy of the display area adjustment operation in the rotated coordinate system. When the driver requests vertical or horizontal movement of the display area, the system calculates the corresponding position in the rotated image coordinate system and displays the display area at that corrected position, making the display area move exactly as intended by the driver without oblique displacement
3Manufacturing precision
If image rotation correction is applied, then the tilted image is corrected, but the display area position becomes misaligned with the driver's intended view
Solution Approach 1:
The system introduces a coordinate system transformation between the display area coordinate system and the image data coordinate system. By establishing the rotational relationship between these two coordinate systems, the system can accurately calculate the display area position in the rotated image and make precise adjustments to maintain proper alignment between the display area and the driver's intended view direction
Data Source
Figure 1(a-1)~1(c-3)
Figure 2(a-1)~2(b-2)
Figure 3(a)~3(b)
AI summary
To provide an image display apparatus that readily adjusts a display area to a desired position. [Means of Achieving the Object] An image display apparatus 10 is provided that includes an imaging device 11 configured to generate image data; a receiving means 22 configured to receive movement of a display area in a vertical direction or in a horizontal direction within the image data, the display area being displayed on a display device, and also receive rotation of the image data; an image processing means 23 configured to rotate the image data in accordance with an amount of rotation, and, in a case where the movement of the display area in the vertical direction or in the horizontal direction is received with respect to the rotated image data, move the display area in the vertical direction or in the horizontal direction within the rotated image data; an image cutting means 24 configured to cut the display area from the image data; and an outputting means 25 configured to display the display area on the display device.