3D Model Registration for Accurate Stereo Point Targeting
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Solution Overview
Problem
Existing systems like SOCET GXP face challenges in accurately targeting from 3D Digital Surface Models (DSMs) due to the lack of integration with Digital Point Positioning Databases (DPPDBs), requiring stereo imagery and complex training, which is further hindered by the obsolescence of stereo hardware and the need for precise geospatial information verification.
Innovation Solution
A system that links 3D Tile Mesh models with stereoscopic image pairs, enabling simultaneous measurement and verification of point measurements across multiple displays, using a registered 3D model to correct dimensions and provide geospatial information with error margins, leveraging validated DPPDBs for accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If stereo imagery is used for accurate point measurements, then measurement precision is improved, but device complexity increases due to specialized hardware requirements
Solution Approach 1:
The patent creates a 3D digital surface model (DSM) as a virtual copy of the terrain that can be displayed on standard monitors. This DSM contains embedded accuracy information and serves as a substitute for traditional stereo imagery, eliminating the need for specialized stereo viewing hardware while maintaining measurement precision through the integrated accuracy data.
Solution Approach 2:
The patent replaces the mechanical/optical stereo viewing system with a digital system that processes and displays 3D model data on standard computer screens. The accuracy information is embedded within the digital model itself, substituting the need for physical stereo equipment with software-based measurement capabilities.
2Ease of operation
If 3D DSM is used for targeting, then ease of operation is improved, but measurement precision deteriorates due to lack of accuracy information
Solution Approach 1:
The patent merges the 3D visual representation with accuracy information by integrating metadata directly into the DSM data structure. This allows the system to simultaneously provide the ease of operating with 3D visualization and the precision of accuracy estimates, as both elements are combined in a single data structure that can be displayed and measured without additional processing.
Solution Approach 2:
The patent introduces an intermediary data layer between the 3D model visualization and the measurement output. This intermediary layer contains the accuracy information that mediates between the simple 3D display and the precise measurement requirements, allowing users to obtain both ease of operation and measurement precision through a single integrated system.
3Measurement precision
If DPPDB alone is used for targeting, then measurement precision is maintained, but ease of operation deteriorates due to difficulty in usage
Solution Approach 1:
The patent segments the targeting workflow into distinct functional components: 3D visualization for easy point placement, accuracy information extraction from the DSM, and verification against the DPPDB. This segmentation allows users to benefit from the precision of the DPPDB while operating through the simplified 3D interface, as each component handles a specific task independently.
Solution Approach 2:
The patent introduces the 3D DSM as an intermediary that bridges the complex DPPDB and the user-friendly 3D display. This intermediary maintains the precision of the DPPDB while providing an easier operation interface, as the DSM translates complex geospatial data into visual form that can be easily interacted with while still accessing accurate measurement information.
Data Source
AI summary
A computer program product and corresponding method for targeting one or more points in a three dimensional (3D) model is provided. The computer program product including least one non-transitory computer readable storage medium in operative communication with a computer processing unit (CPU), the storage medium having instructions stored thereon that, when executed by the CPU, implement a process to register the 3D model with a stereoscopic image pair. The steps performed include inputting a first image and a second image that define a stereoscopic image pair into an object targeting program, wherein an object is shown in the first image and the second image, inputting a three dimensional (3D) model of the object into the object targeting program, registering the 3D model to the stereoscopic image pair, and targeting a point associated with or near the object based on the 3D model having been registered to the stereoscopic image pair.