Voxel Block Selection With Fixed Configuration for Finite 3D Cache
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Solution Overview
Problem
Current 3D reconstruction systems face challenges with scalable block selection due to finite hardware cache sizes, leading to inconsistent outputs and the need for large overflow buffers, as they are not flexible enough to support all 3D reconstruction configurations.
Innovation Solution
A scalable voxel block selection algorithm that uses a fixed block configuration, allowing for conversion of block indices between different configurations, thereby eliminating the need for variable cache requirements and reducing randomness in the selection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If variable block configurations are used to support different 3D reconstruction applications, then adaptability is improved, but device complexity increases due to varying cache requirements
Solution Approach 1:
The patent implements a universal fixed block configuration that can serve multiple different 3D reconstruction applications. By designing a single block configuration that works across various scenarios (different view angles, baseline distances, focal lengths), the system eliminates the need for multiple specialized configurations, thereby reducing hardware complexity while maintaining adaptability through software-level flexibility.
Solution Approach 2:
The patent changes the approach from varying block configuration parameters (size, shape, arrangement) to keep block configuration parameters fixed while allowing the scene to be represented at different resolutions. This is achieved by adjusting the number of blocks selected rather than changing the block configuration itself, thus maintaining universal hardware requirements while supporting diverse 3D reconstruction needs.
2Device complexity
If finite cache size is used in hardware, then device complexity is reduced, but reliability deteriorates due to need for overflow buffers and inconsistent outputs
Solution Approach 1:
The patent performs preliminary selection of blocks based on a fixed configuration before the actual 3D reconstruction process. By pre-determining which blocks will be used and organizing them in a fixed configuration that fits within hardware cache limits, the system ensures consistent and reliable outputs without needing overflow buffers. This preliminary organization eliminates runtime inconsistencies.
Solution Approach 2:
The patent creates a simplified copy or representation of the scene using a fixed block configuration that fits within the hardware cache. Instead of attempting to store all possible blocks, the system creates a representative subset that maintains the essential geometric information needed for reliable 3D reconstruction, thereby ensuring consistency within cache constraints.
3Manufacturing precision
If specialized hardware is used for 3D reconstruction, then manufacturing precision is improved, but adaptability worsens due to inability to support all configurations
Solution Approach 1:
The patent segments the 3D scene into discrete blocks with a fixed configuration. This segmentation allows the system to process different portions of the scene independently using the same hardware, thereby maintaining manufacturing precision for each segment while enabling adaptability across various 3D reconstruction applications through selective block processing.
Solution Approach 2:
The patent introduces dynamics by allowing the number and selection of blocks to vary based on the specific 3D reconstruction application, while the block configuration itself remains fixed. This dynamic selection approach enables the hardware to adapt to different applications (different view angles, baselines, focal lengths) without requiring physical reconfiguration, thus maintaining precision while achieving versatility.
Data Source
AI summary
Systems and techniques are described for performing scalable voxel block selection. For example, a computing device can determine a fixed block configuration based on a storage size limitation. The computing device can select a plurality of blocks of the scene based on the fixed block configuration. The computing device can convert indices of the plurality of blocks associated with the fixed block configuration to indices of a plurality of blocks associated with a particular block configuration (of a plurality of block configurations) that corresponds to a particular 3DR application. The particular block configuration is different from the fixed block configuration.