1. Old Dominion University
Signal Processing Aspects of the Visualization of Scientific Data: An Overview
Dennis Bergin
MSIM 842
Old Dominion University

2. Signal Processing Aspects of the Visualization of Scientific Data: An Overview
Motivation
Explore visualization of scientific
data to improve presentation of
dissertation research
Signal analysis & modification for
real-time virtual pathology
Objectives
Signal Processing in Visualizing Scientific Data
Spiral for Visualization of Serial Periodic data
Research Visualization of Cardiac & Breath
Sounds
Improve Visualization in Presentations
Literature Search
Signal Processing Aspects of Scientific Visualization, R. Moorhead R., Z, 1995.
Interactive Visualization of Serial Periodic Data, John Carlis, 1998.
Investigations into Visualization and Significance of Phase Relationships in
Cardiac Rhythms, Eldon Nelson.
Heart and Breath Sound Visualization work by Hiroshima Makino,
American Society of Anesthesiologists, ,

3. The Visualization Process
Scientific Visualization
Temperature Pressure
Humidity Salinity Density
Velocity Stress
Shape
Color
Opacity
Mapping Numbers
To Imagery
Sound Visualization
Visualization Types
Exploratory or Interactive

4. Signal Processing Issues
Presentation of Scientific Data
Aliasing
Color Models
Automatic Feature Extraction
Filtering
Data Compression
Multiresolution

5. Signal Processing Issues
Issues with Visualization of Time-Invariant 2D Data
Scalar
Contours
Shading
Multivariate
Visual Ambiguity
Screen Clutter
Visual Distortion
Techniques
“Colorwheel”
Streamlines
Line Interval Convolution
Critical Point Analysis

6. Serial Periodic Data Traditional Approaches
REQUIRES: Simultaneous display of serial and periodic attributes (e.g. seasonality)
Traditional Approaches
Timelines for Temporal Data
Dynamic Query Systems/Starfield Displays
Focus+Context /Zoom
Calendar Visualization

7. Spiral Visualization
Year-month Consumption % For 12 Highly Consumed Foods, 1980 – 1988
Indented Spiral, With Spokes Monthly Consumption %,
1980 – 1988
Monthly Consumption % For All 112
Foods During the period 1980 – 1988

8. Average and Maximum Groups Sizes for 2 Chimpanzees
Spiral Visualization
Tightening a Spiral View of
Sound Data from 5 Instruments.
Average and Maximum Groups Sizes for 2 Chimpanzees
Single Spoke of a Spiral Display
of Neuron Firing Frequencies

9. Visualization of Cardiac Rhythms and Breathing Sounds
Phase Relationship of the EKG Data Graph
Investigations of Eldon Nelson

10. Visualization Work by Hiroshima Makino
Visualization of Heart Murmur

11. Visualization of Cardiac Rhythms and Breathing Sounds
3D Visualization of Breadth Sounds Using Visualization Sound Color Software

12. Visualization Work by Hiroshima Makino
3D Breathing Sounds Color Visualization

13. Signal Processing Aspects of the Visualization of Scientific Data: An Overview
Comparison of Related Publications
Nelson and Carlis identify need for better ways to classify scientific data. Not a great deal of work in this area.
Makino, Nelson research in visualizing sound data
Much research in sonification of data - different, but related
Strengths & Weakness of the Content
Good job of identifying needed areas of improvement
Sufficient overview of signal processing aspects of scientific data visualization
Lacking details for implementing spirals
Makino’s work was described clearly and concisely in abstracts

14. Signal Processing Aspects of the Visualization of Scientific Data: An Overview
Useful Applications & Possible Extensions of Work
Spirals for Visualization of Seasonal & Frequency Data
Musical, Pathology, and Other serial periodic data
Impact on the State of the Art
Spirals Effective to Visualize Serial Periodic Data
Provides visual cues to both serial and periodic aspects of the data, and interactions such as the change in period over time
Multiple Common Data Sets and Multiple-link Views,
Data Exploration