Bird's-eye view video generation with dynamic obstacle visibility
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Solution Overview
Problem
Existing bird's-eye view video generation systems suffer from distortion and reduced visibility of obstacles at farther distances from the vehicle, requiring additional display regions for direct videos, which disrupts navigation and audio screens when obstacles are detected.
Innovation Solution
A bird's-eye view video generation system that acquires videos from multiple cameras around a vehicle, uses an obstacle sensor to detect obstacles, and dynamically adjusts the display region by compressing and extending video areas to improve visibility of obstacles, allowing for continuous display without hiding navigation or audio screens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a display region for direct video is added to show obstacles clearly, then obstacle visibility is improved, but navigation and audio screens are hidden requiring user interaction to restore
Solution Approach 1:
The patent extends the bird's-eye view video display region in the vertical dimension to include obstacles in farther distances. By compressing the video in the vertical direction and extending the display region downward, the system maintains all original information while adding visibility for distant obstacles without requiring a separate direct video display region, thus avoiding the need to hide navigation or audio screens.
Solution Approach 2:
The patent applies video compression in the vertical direction to reduce the height of the original bird's-eye view video display region. This parameter change allows the display region to be extended downward while maintaining the same overall screen space, enabling continuous display of navigation and audio information without being obscured by obstacle display regions.
2Loss of information
If video compression is applied to extend display region, then obstacle visibility in farther distances is improved, but video distortion increases
Solution Approach 1:
The patent applies video compression selectively in the vertical direction only, while maintaining the horizontal dimension unchanged. This local quality approach compresses the video height to enable extension of the display region downward, but preserves the horizontal video quality to minimize overall distortion. The compression is applied uniformly across the vertical axis to maintain consistent quality throughout the extended region.
3Measurement precision
If display region is extended to include farther obstacles, then measurement precision of obstacle position is improved, but video area in orthogonal direction must be reduced
Solution Approach 1:
The patent dynamically adjusts the bird's-eye view video display region based on detected obstacle positions. When an obstacle is detected, the system compresses the video vertically and extends the display region downward to include the obstacle. This dynamic adjustment allows the display area to adapt to different obstacle positions and distances, maximizing the use of available screen space while maintaining visibility of both the obstacle and other important information.
Data Source
AI summary
A bird's-eye view video generation device includes a video data acquiring unit that acquires videos from multiple cameras capturing videos of front, rear, a left side, and a right side of a vehicle, an obstacle information acquiring unit that acquires information from an obstacle sensor detecting at least one obstacle around the vehicle, a bird's-eye view video generating unit that generates a bird's-eye view video by synthesizing videos converted by a viewpoint conversion process on the acquired videos and generate, when the obstacle information acquiring unit detects the obstacle, the bird's-eye view video where a display region in a direction of the detected obstacle is extended by reducing a display area of the video in a direction orthogonal to the direction of the detected obstacle toward a direction opposite to the direction of the detected obstacle, and a display controller that displays the generated bird's-eye view video on a display.