Drive Assist Display Sub View Width Correction
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Solution Overview
Problem
Conventional drive assist display apparatuses display a sub view with a width that is excessively wide relative to the vehicle, leading to an impression that the vehicle may collide with parked vehicles during backward travel, due to incorrect representation of the vehicle's width and size in the view point conversion image.
Innovation Solution
The drive assist display apparatus adjusts the sub view to represent the vehicle's width using a reduction scale of the view point conversion image, with a cutout section that can be either rectangular or round, ensuring accurate representation of the vehicle's size and position relative to parking spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the sub view displays a wide area to show more parking spaces, then the coverage area is improved, but the vehicle width is distorted and appears wider than actual causing collision misperception
Solution Approach 1:
The patent divides the sub view into two distinct sections: a first section displaying the parking space area with accurate geometric relationships, and a second section displaying the vehicle width area with corrected scaling. This segmentation allows each section to serve its specific function without the distortion affecting the other, resolving the contradiction between wide coverage and accurate measurement.
Solution Approach 2:
The patent applies different display qualities to different regions of the sub view. The first section (parking space area) uses a display quality optimized for showing geometric relationships and parking space boundaries, while the second section (vehicle width area) uses a display quality that accurately represents the vehicle's actual width. This local differentiation allows the sub view to simultaneously provide wide coverage and precise measurement.
2Loss of information
If the sub view uses viewpoint conversion to show vicinity area, then the spatial awareness is improved, but the vehicle size representation becomes inaccurate leading to collision impression
Solution Approach 1:
The patent segments the viewpoint conversion display into two functional zones: the first section maintains the viewpoint conversion for spatial awareness of parking spaces and surroundings, while the second section applies corrected scaling to accurately represent vehicle width. This segmentation preserves the benefits of viewpoint conversion while eliminating its detrimental effect on size accuracy.
Solution Approach 2:
The patent introduces a scaling correction mechanism as an intermediary between the viewpoint conversion process and the final display. This intermediary adjusts the scaling in the second section to accurately represent vehicle width, mediating between the spatial awareness provided by viewpoint conversion and the size accuracy required for safe parking.
3Area of stationary object
If the sub view displays wide angle to cover more area, then the field of view is improved, but the geometric relationship between vehicle and parking space is distorted
Solution Approach 1:
The patent divides the sub view display into two sections with different geometric properties: the first section preserves the wide-angle geometric relationships for showing parking spaces and surroundings, while the second section applies geometric correction to accurately represent the vehicle's shape and width. This segmentation allows both wide coverage and accurate geometry to coexist in different regions.
Data Source
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AI summary
Provided is a drive assist display apparatus which can display an imaging range needed for the parking point adjustment, and make an easy recognition of the accurate width of the vehicle at the time of the parking point adjustment of the backward or forward traveling vehicle. The reference sign 20 indicates a main view showing an image of a wide backward area of the vehicle. The reference sign 21-3 indicates a sub view showing a view point conversion image of a vicinity of the vehicle 1 as if looked down from a virtual viewpoint. The sub view 21-2 has a down side region where a thickness of the view point conversion image of the bumper 13 from the taken image is moderately represented and left and right side regions except the region of the bumper 13 where a taken image of an area around the vehicle is substantially shown. The sub view 21-3 is formed as provided with a cutout section having a width corresponding to a width of the vehicle in accordance with a reduction scale of the view point conversion image. The cutout section has sides rounded in form. The reference sign 22-3 indicates a mask picture view filling a space between the main and sub views 20 and 21-3 without showing any taken image.