Advanced 3D Visualization with Avizo Using LabVIEW Data

(1)

Advanced 3D Visualization with Avizo

®

Using LabVIEW Data

Shawn Zhang & Patrick Barthelemy

VSG - Visualization Sciences Group

(2)

Agenda

• 3D Visualization Needs from LabVIEW Users

• Avizo Values

• Case Studies and Demos

3D medical imaging

• Using LabVIEW-Avizo integration bridge (prototype)

3D bridge structure analysis

4D reservoir thermo analysis

(3)

3D Visualization Needs from LabVIEW Users:

• Continuing explosion of data size due to

enhanced data acquisition capabilities

• Growing needs on comparing and fusing data

from difference sources

• Increasing appetite on interactivity and

performance

(4)

Sample LabVIEW customer requests:

• Texture mapping (Obastat – solved in 8.2)

• Edge visibility when lighting is on. Need to

overlap solid and line (nilak)

• Rotating performance of 32000 points as an

elevated surface (Chilly Charly)

(5)

Avizo Application Framework

aviso

–noun, a boat used esp. for carrying dispatches; dispatch boat. [Origin: 1625–35; < Sp, n. deriv. of avisar to advise]

Dictionary.com Unabridged (v 1.1)

Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Aviso

\A*vi"so\, n. [Sp.] 1. Information; advice. 2. An advice boat, or dispatch boat.

(6)

Avizo Key Values

• Advanced framework for 3D data visualization & analysis

• Perfect fit for researchers, engineers

Quick data inspection and analysis with ease-of-use GUI

State of the art rendering techniques (based on Open Inventor)

Combine multiple data sources, very flexible

3D data analysis workflow: 3D data fusion, registration, quantification, geometry segmentation and reconstruction, simulation data post-processing

Powerful presentation and collaboration support

Ready-for-use from laptop, desktop to VR system

Application framework: customizable and extensible

Geobench, INRIA/I3D, data courtesy of CEA

(7)

Avizo: One-stop visualization

• 3D imaging

CT scan, MRI, PET, microscopy, FIB/SEM, ultrasound

Seismics, GPR, EMR

• 3D models/scenes

Hierarchical CAD models, NURBS, textures, bump, shaders, advanced

transparency

• 3D point sets

Laser surface scanners, CMMs

• 3D simulation

FEA, CFD, MHD, multi-physics, molecular dynamics

Transient

(8)

Avizo in materials science and NDT

• Electronics/semiconductors, composite materials, metallic foams, metallurgy,

nanotechnology, powders, films, fibers, food and seeds, building materials,

rocks, material characterization, performance/process, nanometric

measurements, surface analysis, corrosion, fatigue, QC, non destructive

testing, industrial CT, tomography…

Image: B. Connolly - U. Birmingham

Risø

(9)

Avizo in Computer Aided Engineering

• Image to simulation, structural analysis, aerodynamics analysis,

crash analysis, engineering design review, reverse engineering

(10)

Avizo in oil & gas, and geosciences

• Seismics/geophysics, petrography/geology, core sample, borehole,

GPR, EM resistivity

Courtesy: U. Minnesota

Vista Centre Birmingham Data courtesy: PGS

(11)

Avizo in other social and physical sciences

• Earth Sciences, climatology, oceanography, environment, chemistry / molecular

dynamics, archaeology, heritage, paleontology, geophysics, geology, astrophysics,

science museums …

(12)

(13)

Case Study 1:

3D imaging

• 256x256x100 mouse tendon imaging data

• Source: LabVIEW Discussion Forum User “AntLee29”,

(14)

Open challenges for 3D image data

• Noise

• 3D rendering efficiency and interactivity

Forum user “Ben”: With the FP open it took about 38 minutes on a 2GHz laptop

with 1G memory. With the FP closed, the code runs in about a minute! Zooming, dragging and rotating also takes about a minute.

• Rendering quality

• Anatomy segmentation

• Geometry reconstruction

(15)

The LabVIEW-Avizo Interface

• Use LabVIEW’s text object and command

object to create Avizo script and launch Avizo

process.

• Avizo and LabVIEW threads are independent

• Users can control Avizo interactively within

(16)

Challenges addressed: Noise removal, Rendering quality, and

Rendering interactivity

LabVIEW data is filtered with a few noise removal algorithms, and rendered with high-quality (lighting and transparency), level-of-detail (for large data) based volume rendering at interactive frame rate on a laptop.

(17)

Challenges addressed: Anatomy Segmentation, Geometry

reconstruction and tissue quantification

Layers of tissues are segmented, reconstructed, and measured both in terms of geometry probes (annotated in upper part of the 3D window) and tissue statistics (the speadsheet window at lower right). Different tissues are visualized with different color code. The geometry can be used directly in FEA/CFD solvers for stress, flow, heat transfer analysis, which can be co-visualized inside Avizo afterwards.

(18)

Case Study 2:

structural analysis

• 3D bridge data generated by a simulated model at resonant

frequency, which is then validated and calibrated using

accelerometers, strain gages and displacement sensors. The

experimental data is captured and pre-processed with LabVIEW,

using data acquisition boards (DAQ) and signal conditioning

modules (SCXI).

43438 data points in the simulated model, each carries x,y,z coordinates

and two vectors representing two modes of displacement.

• Corresponding CAD geometry and simulation data is obtained

using Abaqus® FEA software

CAD geometry in VRML format with 63,000 triangles.

(19)

Open challenges

• Federating 3D CAD, point cloud measurement

and volumetric simulation data

Mode 1

(20)

(21)

Data derivation

(22)

Data clipping

(23)

Volume data reconstruction from sensor cloud

3D volumetric data is reconstructed from the point cloud sensor data, and volume rendered, in this case, using displacement magnitude in mode 2.

(24)

(25)

(26)

(27)

(28)

(29)

(30)

(31)

Case Study 3:

geophysics

• 3x5x6 3D thermocouples sensor array, capturing

heat changes within a 3D model.

• 1600 time steps of transient scalar data.

• Data courtesy, Kelly Knorr, Ryan Wilton and

Barry Trapp of Saskatchewan Research Council,

Canada.

(32)

Transient data visualization

(33)

Projects under discussion…

• Real-time LabVIEW Avizo Interaction

• Large amount of transient data

(34)

Courtesy, Eagle Harbor Technologies, INC

ETH: The need for 3D visualization of large data sets

generated by Real Time Sampling

Proposed Application #1:

Networked Cube Satellite Constellation (100 Satellites)

Each satellite utilizing EHT Remote Data Acquisition and Telemetry Pack (RATPAC) RATPAC is a low cost, low power and small volume onboard computer for CubeSats

Up to 8 channels, 10 bit ADC, 10Ksps for each satellite. Controlled by Arm 7 utilizing LabVIEW Embedded.

Onboard GPS and 2-way telemetry link using ZigBee or similar.

Satellites are networked and all data is transmitted to ground station with active telemetry link.

Ground station telemetry link acquires data for each satellite.( Position, Velocity, Sensor Data)

(35)

Earth Downlink

The need for 3D visualization of large data sets

generated by Real Time Sampling

(36)

Need:

Acquire and process data in real time.

Generate 3D visualization of data. (ie, Satellite Position, Senor Data) Enables real time user or control loop tasking of satellites with ground based computational resources not available on each small satellite. Satellite constellation now can act in coordinated manner providing low cost and redundant system with very high performance capabilities. Example applications. (In Space Telescopes and Radar Systems)

The need for 3D visualization of large data sets

generated by Real Time Sampling

(37)

Proposed Application #2:

Real Time, 3D Visualization and Modeling of Wind Tunnel Data Example: Kirsten Wind Tunnel at University of Washington

•Approximately 100, 10 Bit ADC channels, 100 Hz Sampling Frequency

•Data collected using 3rd_{party hardware with LabVIEW control software}

Current Data Collection and Display Process:

Sensors ADC LabVIEW Processing and Storage of Data In House Visual Basic Script

The need for 3D visualization of large data sets

generated by Real Time Sampling

(38)

Optimum Data Collection and Display Process:

Sensors ADC

LabVIEW with Avizo

LabVIEW Data and Signal Processing GPU Accelerated Real Time 3D Display This process can also support real time numerical modeling (ie. CFD) with active empirical data feedback and control - an application currently desired by the DOD.

It would provide an unprecedented level of aerodynamic modeling. Modeling routines will be integrated onto GPU (by EHT) for real time, massively parallel numerical simulations with 3D visualization supported by Avizo.

The need for 3D visualization of large data sets

generated by Real Time Sampling

(39)

SUNY-Buffalo

NI cameralink board and LabVIEW based

cone-beam computed tomography (CBCT) system

Multiple coronary angiograms acquired by CBCT

3D geometry reconstruction and carotid tortuosity calculation

(40)

SRC Canada

NI thermal couple sensor

SRC heat transfer simulation code

developed with Avizo

Real-time Avizo/LabVIEW

interface

Simulation data post-processing

and co-visualization with

experiments

(41)

Avizo/LabVIEW integration: 3 stages

• Disk-data based, post-processing bridge

• Script based co-processing bridge.

Continue improvements

• Address-space based, co-processing bridge.

(42)

Concluding Remarks

• 3D visualization is becoming more important in LabVIEW

applications.

• Avizo is a good complimentary tool to enhance

LabVIEW’s 3D capability,

Avizo’s graphical programming diagram fits well with LabVIEW

convention, hence easier to adapt by LabVIEW developers.

It is possible to extract visualization and data analysis tasks

that are common to a category of LabVIEW applications.

LabVIEW users will be able to take advantage of advanced 3D

visualization and data analysis capabilities without re-inventing

the wheel.

(43)

Concluding Remarks

• National Instrument and VSG are looking forward

to working with LabVIEW users to meet their

(44)

Thank you.

LabView is a trademark of National Instruments, Corp.

(45)

LabVIEW/Avizo co-processing bridge

1. DLL (Call library function node) approach

2. CIN (Code interface node) approach

LabVIEW call an external algorithm (C++)

The external algorithm serves as a broker with Avizo customer module

to communicate data

Avizo customer module talk to the broker to check the data availability

3. ActiveX approach

LabVIEW as ActiveX server

Experience exists on both side (Avizo/visilog integration)

(46)

NI 3D Capabilities Review

• 3D Graph Control

ActiveX container interface

Points/line/surface/parametric, pan/zoom/rotate, lighting/shading/

transparency/wireframe, contour, plane projection,

Cartesian/polar/cylindrical coordinates, orthographic/perspective viewing,

axis scals and labels.

OpenGL

• 3D Picture control

VRML/STL/ASE format

OpenSceneGraph

• 3D Sensor mapping

• NI Insight

• DIAdem

(47)

Avizo: Open Framework

• Allow programmer to develop new

modules

File readers

File writers

Modules for visualization

Modules for processing data

Additional custom GUI elements (Qt)

Integrate existing code

• C++ extension interface

Comprehensive Avizo API, 1000+ classes,

including Open Inventor API

Rapid development with wizard

_Standard

Edition

Developer Edition

(48)

Avizo: Open framework for automation

• TCL scripting interface

Scripting

Script object

Template

• C++ interface

(49)