1. حيـــم
الر
حمن
الر
الله
بســـم

2. Peresented by: Fazel Farnia jesus4christ@gmail.com
Information Visualization
Peresented by: Fazel Farnia

3. Introduction
The information revolution is changing the way many people live and think. Vast quantities and diverse types of information are being generated, stored, and disseminated, raising serious issues about how to make such information usable. Information visualization has evolved as an approach to make large quantities of complex information intelligible.

4. What is Visualization? Visualize/Visualization: To form a mental image
To imagine or remember as if actually seeing
Constructing a visual image in the mind

5. Dr. John Snow, 1845
London cholera epidemic

6. William Playfair, 1786
Published the first presentation graphics

7. Information Visualization
The use of computer supported,interactive, visual representations of abstract information to amplify cognition.
InfoVis ≠ Data Vis
Principal task of information visualization:
allow information to be derived from data

8. Principal Components of Information Visualization
Representation
how the data is encoded
usually in visual form
Presentation
how suitably encoded data is laid out in:
available display area time
Interaction
actions performed by user to move from one view of the data to another

9. Insight
Human vision contains millions of photoreceptors and is capable of rapid parallel processing and pattern recognition. The impressive bandwidth of vision as a mode of communication leads to the efficient transfer of data from digital storage to human mind.

10. Design
Like any user interface, effective information visualizations are difficult to design. Fundamentally, information visualizations make abstract information perceptible. The two most challenging characteristics of information that make designing effective information visualizations difficult are: (1) complexity: supporting diverse abstract information that may have multiple interrelated data types and structures. (2) scalability: supporting very large quantities of information.

11. The Process Of InfoVis

12. Types of Information
Linear: Tables, program source code, alphabetical lists, chronologically ordered items, etc.
Hierarchies: Tree structures.
Networks: General graph structures, such as hypermedia node-link graphs, semantic networks, webs,etc.

13. VISUALISING HIERARCHIES
The Java Swing JTree tree view component. A view of directories on the
left and their contents on the right.

14. Information Structure
Tabular Structure
Spatial and Temporal Structure
Tree and Network Structure
Text and Document Collection Structure
Combining Multiple Structures

15. Example Of Tree

16. Cone Tree

17. Goals of Information Visualization
More specifically, visualization should:
Make large datasets coherent (Present huge amounts of information compactly)
Present information from various viewpoints
Present information at several levels of detail
(from overviews to fine structure)
Support visual comparisons

18. The Future
Information visualization is a relatively young field (e.g. the IEEE Symposium on Information
Visualization started in 1995).
A few critical areas of need that should be explored in the foreseeable future include:
Visualization of massive data
Integrating visualization with the analysis context
High-resolution visualization

19. Conclusion Use Vision to Think
The use of information visualization is improving of techniques for giving the best cognition.
Slogan Of Information Visualization Is:
Use Vision to Think

20. References INFO 424 October 3, 2006 Polle Zellweger
Chris North,Center for Human-Computer Interaction,Department of Computer Science
Virginia Polytechnic Institute and State University.
Christian Tominski Computer graphics research seminar Rostock, June 28, 2005
Jonathan I. Maletic, Ph.D.<SDML> Computer Science Kent State University
Dr. Keith Andrews IICM Graz University of Technology Inffledgasse 16c A-8010 Graz
Jeffrey Heer , Stuart K. Card , James A. Landay Group for User Interface Research
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