DDI Dense Point Cloud Processing Presentation Oct2009

Dense 3D Scan Point Cloud Processing Software Review Peter Kennedy Michael Raphael www.directdimensions.com [email_address] [email_address] 410-998-0880

About Direct Dimensions, Inc.
Technical Expertise Areas
Products and Capabilities
Typical Workflow
Points to Polygons
Case Studies
C5A Interference Study
Texas A&M NASA Gulfstream 2
Graving Dock
Interactive Discussion
Table of Contents Dense 3D Scan Point Cloud Processing Software Review

rapid solutions to 3D problems... Direct Dimensions, Inc.
Leading Experts in Close-Range 3D Imaging
Widest Toolset for Portable 3D Metrology
Specialists in Manufacturing Problems
Reverse Engineering to CAD Models
Raw Data into Surfaces & Solids
Engineering for “Design Intent”
Complex 3D Inspection and FAI’s
Thousands of Successful Projects
14-years of Experience, Staff over 20
One-Stop-Shop for Expert 3D Scanning

Technical Expertise Areas Military/Aerospace Automotive Industrial Consumer Products Medical Art/Architecture 1000s of Projects for 100s of Customers Direct Dimensions, Inc.

Hardware
FARO Portable CMMs & Scanners
FARO Large-Volume Scanners
LDI SLP Laser Scanner
Basis Software Surphaser
Steinbichler Comet 5 White-Light
Kreon Zephyr Laser Scanner
Konica Minolta VIVID and Range7
ViALUX z-Snapper 3D Camera
Software
PolyWorks
Geomagic
Rapidform
Imageware
3D-Doctor
Pointools
FARO CAM2
Rhino3D
RevWorks
Verisurf
Products and Capabilities Direct Dimensions, Inc.

Example Data Alignment and Processing Software Typical Dense Point Cloud Processing Workflow Example Data Collection Equipment Aligned Point Clouds and Polygonal Models

Aligned Point Cloud Polygonal Model Final CAD Typical Dense Point Cloud Processing Workflow Modeling Software

User has large amount of control
Distributed processing
Still a significant time investment with a high density point cloud
Points to Polygons Dense Point Cloud Polygon Model Creation Do not take advantage of distributed processing at this time

C5A Interference Study Project Overview
Customer Interested in virtual test fit of a large cargo pallet
Massive interior cabin also contains many small components required by customer
Interior cabin measurements:
121 feet long
13.5 feet high
19 feet wide
Large Scale Object including Small details required high resolution scans

C5A Interference Study Detail Overview

C5A Interference Study Measurement Tools Surphaser HSX IR 3D Spherical Laser Scanner Faro Laser Tracker

C5A Interference Study Scanning Approach

C5A Interference Study Sphere Location Close-Up

Approximately 2 billion points collected
Very large file sizes- File I/O slow
Must retain full resolution on small details throughout the aircraft
Project timeline- 4 weeks total from scanning to delivery of engineered surface model
C5A Interference Study Processing Challenges

C5A Interference Study Processing Solutions High-End Workstations accelerate processing and alignment - Dual quad core cpu’s - Nvidia Quadro FX4600 GPU -16GB+ RAM -15,000 RPM SAS hard drives
64-bit PolyWorks V10 utilized for alignment of Surphaser scans
N-pairs of center points alignment in IMinspect module used
Multiple Users align scans to Laser Tracker coordinate system concurrently
Section out specific areas of interest for full resolution and decimate remainder
Break up large point clouds into manageable sections for downstream CAD work

Customer designing new wing and needed a model of current configuration
Scanned using Surphaser HSX IR
No tracker used for coordination
Small details required very high resolution scans (ex. vortex generators)
PolyWorks used for alignment and point cloud export
Imageware used for modeling
SolidWorks utilized for stitching surface models into solids
NASA Gulfstream II Project Overview Vortex generators on top of wing

NASA Gulfstream II Project Challenges
Capturing entire airplane at resolution required for smallest detail
38 Surphaser scans containing roughly 2 billion points (not all scans full 360 degrees)
Ensuring scan encompassed all areas of interest
Scan alignment without master coordinate system from laser tracker
Chrome surface finish on leading edges of wings and engine nacelles

NASA Gulfstream II Project Solutions
Utilized high-end workstations running 64-bit PolyWorks V10.1.17 to import PTX files for
alignment and export of clean point clouds
Paid special attention to ensure comprehensive scan coverage
Adequate coverage of spheres critical to alignment quality
Took obvious occlusions such as engine pylons and wings into account
Iteratively aligned scans using 6” spheres placed on and around the aircraft
Proved to be more difficult than the laser tracker approach
Blue painters tape was applied to shiny areas on the aircraft

Existing condition of 1960’s-era dry dock
Structural failure occurred
800’ long, 75’ high, 100-ft across
Graving Dock Electric Boat Corp.

Raw data assembled virtually and organized into geographical segments

Portions of the finished polygon shell
High level detail allows for accurate analysis
Polygons were then NURBS surfaced

Final model as a solid in Pro-E
3 different models assembled: Coffer Dams (gray), Rock Wall (red), Concrete Columns (blue)

Dense 3D Scan Point Cloud Processing Software Review Thank You! Questions? Michael Raphael and Peter Kennedy www.directdimensions.com [email_address] [email_address] 410-998-0880

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DDI Dense Point Cloud Processing Presentation Oct2009

by Direct Dimensions, Inc. on Oct 19, 2009

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DDI Dense Point Cloud Processing Presentation Oct2009 — Presentation Transcript