3D Object Scanning Using Coarse Models for Coverage Feedback
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Solution Overview
Problem
Existing scanning systems lack effective methods to assess and provide feedback on sensor data quality during the scanning process for generating 3D models, leading to inefficiencies and potential gaps in data coverage.
Innovation Solution
Implementing a system that generates a coarse 3D model in real-time during scanning, assesses coverage values for sensor data, and provides feedback to users through visual and interactive indicators to ensure comprehensive data capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a detailed 3D model is generated in real-time during scanning, then the quality of the live feedback model is improved, but the processing time and computational complexity increase making real-time generation infeasible
Solution Approach 1:
The patent segments the 3D model representation into two distinct levels: a coarse voxel-based model for real-time live feedback during scanning, and a detailed model generated after scanning completes. This segmentation allows the system to provide immediate visual feedback with simplified geometry while the comprehensive detailed model is processed separately, resolving the contradiction between real-time performance and model quality.
Solution Approach 2:
The system performs partial model generation during scanning by creating only a coarse voxel-based representation rather than a complete detailed model. This partial action provides sufficient feedback for guiding the scanning process without requiring the full computational resources needed for detailed model generation, thus enabling real-time operation.
2Manufacturing precision
If comprehensive sensor data is collected from all angles during scanning, then the coverage and quality of the final 3D model is improved, but the scanning time and number of required scans increases
Solution Approach 1:
The patent implements a feedback mechanism where coverage values are calculated and displayed in real-time during the scanning process. This feedback guides the user on which areas need additional scanning, allowing them to efficiently capture comprehensive coverage without unnecessarily scanning already-sufficient areas multiple times, thus improving both coverage quality and scanning efficiency.
Solution Approach 2:
The system performs preliminary assessment of coverage during the scanning process by calculating coverage values for each scanned area. This preliminary action allows the system to identify which areas have sufficient coverage and which need more scanning, enabling the user to stop scanning early in well-covered areas and focus efforts on under-scaned regions.
3Measurement precision
If coverage assessment is performed on every scanned portion in real-time, then the accuracy of feedback information is improved, but the computational load and processing time increases
Solution Approach 1:
The patent applies local quality assessment by calculating coverage values for specific discrete portions (voxels) of the scanned object rather than attempting to assess the entire object uniformly. Each voxel is independently evaluated based on the sensor data that covers it, allowing for accurate local coverage measurement while keeping individual computational tasks manageable and parallelizable.
Data Source
AI summary
Various implementations disclosed herein provide feedback to a user during object scanning based on how well sensor data of the scanned object has been captured. During object scanning a user may move an electronic device with sensors (e.g., cameras, depth sensors, etc.) around an object to capture sensor data for use in generating a final 3D model of the object. Live feedback during the scanning process is enabled by assessing how well the captured sensor data represents different portions of the object. In some implementations, a 3D model is generated, updated, and assessed based on the sensor data live during the scanning process. This live 3D model may be coarser (i.e., having fewer details) than the final 3D model.