ntutcsie

Research


Particle Swarm Tracing for Transfer Function Design

cluster
cluster
cluster

A population of simple agents interacting locally with one another and with the volume data. The agents scatter around the volume data and approach areas that contain features. No preprocess of the volume data is required for visualizing and exploring the features.




Volume Rendering of the 1999 Chi-Chi Earthquake

cluster

Direct volume rendering is used to depict the space-time relationships of seismic readings collected from sensor stations. The resulting visualization reveals the sequence of seismic wave initiation, propagation, attenuation over time, and energy releasing events.

Video: 1999 Chi-Chi Earthquake
Video: 1999 Chi-Chi Earthquake (Volume Rendering)
Video: 1999 Chi-Chi Earthquake (simulation perspective)
Video: 1999 Chi-Chi Earthquake (simulation ortho)




LIDAR

pic lidar

LIDAR point cloud.

Web: LIDAR




Spherical Panorama

cluster

Spherical Panorama It's a video-based spherical coordinate conversion system using OpenGL and OpenCL.

Video: Spherical Panorama (W.-S. Liao)



Visualization Cluster

cluster

HIPerWall is a 200 mega-pixel tiled display wall consisting of fifty 30" LCDs and a cluster of Mac G5s. A distributed visualization system was developed to render large-scale datasets on HIPerWall. The designated control node broadcasts viewing parameters to all other nodes. After receiving the messages, each rendering node updates its display content.

Video: Visualization cluster




Computation on Programmable Graphics Hardware

Hardware-assisted visualization of seismic wave propagation. From the benefits of GPU's stream processing power, the rendering speed was increased by moving intensive computation away from CPU. The 1994 Northridge earthquake ground movements are augmented with terrain models to provide geographically anchored data that can be more easily conceptualized and analyzed

Video: Ground displacement of the 1994 Northridge Earthquake




Large-Scale Seismic data Visualization

Alaska

Visualization of large field-measured seismic datasets. Case studies include NEIC earthquake records, SCIGN GPS network readings, and ground movement measurements obtained from various seismic networks.




Van Nuys Case Study

vannuys

The studied building is a 7-story reinforced concrete structure located in central San Fernando Valley, California. The California Strong Motion Instrumentation Program (CSMIP) manages the seismic instrumentation installed throughout this building. A detailed 3-dimensional model of the building was built.  The field measured datasets are discretely mapped onto the geometric model and used to generate temporal simulations reproducing the deformation patterns.

Video: Building's response to the 1994 Northridge Earthquake




Parallel Computing

flow

Developed a parallel computing algorithm on a cluster of 25 machines. This approach shows a significant improvement in rendering capacity over existing methods for terrain rendering.


 

 

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Taiwan Historical Earthquakes VRML Demo Cortona VRML Client is required to run VRML.
 
1994 Northridge Earthquake
1994 Northridge Earthquake
 
Mt. St. Helens
Seismic Data Visualization
 
Seattle
Seismic Data Visualization
 
Puente Hills
Seismic Data Visualization 1994 Northridge Earthquake and its aftershocks, Northridge fault, and Punte Hills blind Thrust.
 
Mt. St. Helens
Terrain Visualization
 
Van Nuys
Van Nuys Case Study
 
Flight
Flight Path Visualization
 
Van Nuys
Flight Path Visualization