‫حي ــم‬
‫الر‬
‫الرحمن‬
‫هللا‬
‫بس ــم‬
Information
Peresented by:
Visualization
Fazel Farnia
[email protected]
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.
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
Dr. John Snow, 1845
London cholera epidemic
William Playfair, 1786
Published the first presentation graphics
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
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
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.
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.
The Process Of InfoVis
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.
VISUALISING HIERARCHIES
The Java Swing
JTree tree view
component. A view
of directories on the
left and their
contents on the
right.
Information Structure
• Tabular Structure
• Spatial and Temporal Structure
• Tree and Network Structure
• Text and Document Collection Structure
• Combining Multiple Structures
Example Of Tree
Cone Tree
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
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
Conclusion
The use of information visualization is improving of
techniques for giving the best cognition.
Slogan Of Information Visualization Is:
Use Vision to Think
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
• http://www.VRVis.at/
• http://www.ccwmagazine.com ‫آقای شایان رضا مشاطیان‬، ‫دنیای کامپیوتر و ارتباطات‬