Polyhedron Lens Architecture for Synchronized 360-Degree Image Capture
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Solution Overview
Problem
Conventional rolling shutter systems suffer from image defects due to line-by-line scan time differences, particularly evident in dynamic 360-degree camera captures using regular hexahedron lens structures, resulting in poor image mosaicking and noticeable defects in lens interleave portions.
Innovation Solution
A polyhedron lens architecture where lenses are inscribed to a virtual sphere with optical axes intersecting at a structural center, employing a rolling shutter scan method that synchronizes the scanning of upper and lower hemisphere lenses from their respective apexes to a horizontal plane, ensuring concurrent and synchronized scanning to minimize time differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional rolling shutter performs line-by-line scanning on a regular hexahedron lens structure, then the scanning process can be completed, but image defects occur due to scan time differences between neighboring lenses
Solution Approach 1:
The patent divides the hexahedron lens structure into six independent lens units, each with its own scanning control. By segmenting the scanning process and controlling each lens's scan timing independently, the system compensates for the inherent time differences in line-by-line scanning, thereby reducing image defects and improving mosaicking quality.
2Adaptability or versatility
If lenses are arranged in a regular hexahedron structure to capture 360-degree views, then the field of view coverage is improved, but frame differences between lens interleave portions become obvious in dynamic captures
Solution Approach 1:
The patent implements dynamic scanning control where each lens's scan timing is adjusted based on its position and the captured scene's motion characteristics. This dynamic adjustment allows the system to maintain consistent frame rendering across all lens interleave portions, even when capturing dynamic 360-degree views, thereby improving image capture consistency.
3Ease of manufacture
If a rolling shutter scans all lines of each lens sequentially, then the scanning process is simple to implement, but large frame differences occur in lens interleave portions
Solution Approach 1:
The patent performs preliminary timing calculations and offset adjustments for each lens's scanning process. Before actual scanning begins, the system pre-determines the optimal scan timing for each lens based on its position in the hexahedron structure, thereby preventing large frame differences in lens interleave portions while maintaining the simplicity of sequential scanning implementation.
Data Source
AI summary
A polyhedron lens architecture is disposed in a virtual sphere. The virtual sphere has a horizontal plane, an upper hemisphere above the horizontal plane and a lower hemisphere below the horizontal plane. The polyhedron lens architecture has an upper half part above the horizontal plane, and a lower half part below the horizontal plane. The polyhedron lens architecture includes: multiple bases, which are respectively disposed on the upper half part and the lower half part; and multiple lenses respectively disposed on surfaces of the bases. Optical axes of the lenses intersect at a central point, which is located at the horizontal plane and is a structural center of the polyhedron lens architecture.