3D Survey Reconstruction Over Low-Bandwidth Harsh-Environment Links
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Solution Overview
Problem
Challenges exist in accessing and controlling survey data in real-time from harsh environments due to limited communication channels, necessitating unsafe physical presence or low-resolution data transmission.
Innovation Solution
A mobile survey device equipped with a 3D reconstruction algorithm processes high-resolution images locally, generating 3D survey data that is efficiently transmitted over low bandwidth links to a remote server for real-time expert access and control, utilizing pose data and cooperative processing to maintain model accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high resolution survey data is transmitted over low bandwidth data links, then data quality is improved, but transmission time and energy consumption increase significantly
Solution Approach 1:
The patent extracts and transmits only the essential 3D survey data elements (point clouds, geometric features) rather than complete high-resolution images. The mobile device performs local image processing to extract critical spatial information, which is then transmitted efficiently over low bandwidth links to the remote server, resolving the contradiction between data quality and transmission time.
Solution Approach 2:
The mobile device performs preliminary processing of survey images on-board before transmission. By executing 3D reconstruction algorithms and extracting key geometric data locally, the system prepares the data in advance, reducing the amount of information that needs to be transmitted and thereby decreasing transmission time while maintaining data quality.
2Measurement precision
If high resolution survey data is transmitted over low bandwidth data links, then data quality is improved, but energy consumption increases
Solution Approach 1:
The system extracts only essential 3D survey parameters and geometric features from captured images, transmitting minimized data sets over low bandwidth links. This extraction approach maintains measurement precision while dramatically reducing the energy required for data transmission compared to sending complete high-resolution images.
Solution Approach 2:
The mobile device performs preliminary 3D reconstruction and data processing locally before transmission. By preparing and compressing survey data on-board using onboard processors, the system reduces transmission requirements and associated energy consumption while preserving data quality for remote analysis.
3Ease of operation
If experts are physically present at the survey site to view live data, then real-time access is improved, but safety risks increase
Solution Approach 1:
The patent introduces a remote server as an intermediary between the mobile survey device and experts. The server receives processed 3D survey data via low bandwidth links and makes it accessible to experts at safe remote locations, enabling real-time monitoring without exposing personnel to hazardous environments.
Solution Approach 2:
The system creates digital copies of the survey environment through 3D reconstruction and point cloud models. These virtual representations allow experts to interact with and analyze survey data remotely, providing real-time access to survey information without physical presence at dangerous locations.
4Measurement precision
If complete images are transmitted instead of processed data, then data quality is improved, but data link efficiency deteriorates
Solution Approach 1:
The mobile device extracts essential 3D survey information (point clouds, geometric features, spatial coordinates) from captured images and transmits only these processed data elements. This extraction maintains the critical measurement precision needed for survey analysis while dramatically improving data link efficiency by reducing transmission data volume.
Solution Approach 2:
The system performs preliminary processing of captured images on the mobile device, converting complete images into condensed 3D survey data formats before transmission. This pre-processing step preserves essential survey information while optimizing data for efficient transmission over constrained bandwidth links.
Data Source
AI summary
A system which includes a mobile device and a server. The mobile device captures images of the survey site. A pose sensor detects the pose of the mobile device. The captured images are transferred to a data processor running a 3D reconstruction algorithm. The 3D reconstruction algorithm generates 3D survey data based on the images which is used to develop a local 3D model. The data processor also uses the images to create processed data. A transceiver transmits the processed data and/or pose data to the server. The server receives the 3D survey data and develops a server site 3D model.