1. Outline Announcements Syllabus General Introduction to Computer Vision
Background
Applications
Related areas

2. Visual Perception Modeling
Announcements
Textbook and class materials
There is no textbook for you to buy for this class (The textbook will be published in Feb and you can put an order from Amazon.com at $67.00 if you wish to)
The textbook is available online and we will use some chapters from it
I will make the papers from literature either available from the class web page or in hardcopy
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Visual Perception Modeling

3. Visual Perception Modeling
Announcements – cont.
About this class
In this class, I will present methodologies and techniques in computer vision research with potential applications
You need to participate the class discussion by sharing your thinking and ideas
Attendance is required and is part of the grading
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Visual Perception Modeling

4. Visual Perception Modeling
Announcements – cont.
Research paper option
You need to write two research papers for this class
You need to present your papers to the class
A research paper can be a literature review of a particular topic or a paper that is interesting to you
You need to talk to me about your topics
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5. Visual Perception Modeling
Announcements – cont.
Programming assignment option
You need to do a project that is interesting to you
I will provide you some basic functions as reading/writing images, filtering, and other functions I have
You need to write a report about your project, present and demonstrate your project to the class
You need to give me an outline of your project before you start working on it
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Visual Perception Modeling

6. General Introduction to Visual Perception
The process of acquiring knowledge about the environmental objects and events by extracting information from the light they emit or reflect
Visual perception is a very complicated process, involving different processes such as memory
Visual perception is the most useful source for information as about 50% of the brain is devoted to visual processing
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Visual Perception Modeling

7. Visual Perception Modeling
Visual Pathway
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8. Visual Perception Modeling
Eye-Camera Analogy
The eye is much like a camera
Both form an upside-down image by admitting light through a variable-sized opening and focusing it on a two-dimensional surface using a transparent lens
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9. Visual Perception Modeling
Illusion
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10. Visual Perception Modeling
Illusion – cont.
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11. Visual Perception Modeling
Ambiguous Figure
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12. Visual Perception Modeling
The goal of visual perception is to make assertions about the actual state of the surrounding world based on the limited and incomplete information encoded in the neural states
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13. Visual Perception – cont.
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14. Visual Perception Modeling
Computer Vision
The goal is to design a computer system which makes inference from images or image sequences
Produce a description of an image or an image sequence based on the numerical representation of images
It is a very difficult problem
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15. Visual Perception Modeling
Exercise #1
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16. Computer Vision Applications
Military applications
Automated target recognition
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17. Geographic Information from Images
An image of Washington, D.C. area
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18. Medical Image Analysis
Characterize different types of tissues in medical images for automated medical image analysis
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19. Computer Vision Applications – cont.
Civilian applications
Biometrics
From faces, fingerprints, iris patterns .....
It has many applications such as ATM withdrawal, credit card managements .....
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20. Computer Vision Applications – cont.
Iris pattern recognition
Companies in several countries are now using these algorithms in a variety of products. Information about them can be found on the following websites:
Iridian Technologies, USA
IrisAccess LG Corp, South Korea
IrisPass OKI Electric Industries, Japan
EyeTicket Eyeticket Corporation, USA (ticketless air travel)
NCR CashPoint Machines NCR Corp, UK
Diebold ATMs Diebold Inc., USA
British Telecommunications, UK
The Nationwide Building Society, UK
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21. Computer Vision Applications – cont.
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22. Visual Perception Modeling
Video Editing
Blues screen technique
Have the foreground subject video-graphed in front of an evenly lit monochromatic (blue or green) background
Replace all the selected background in the picture with another background image
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Visual Perception Modeling

23. Blue Screen Editing – cont.
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24. Video Sequence Analysis
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25. Visual Perception Modeling
Face Recognition
Given some examples of faces, identify a person under different pose, lighting, and expression conditions
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26. Visual Perception Modeling
Object Recognition
Examples of the COIL database
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27. Visual Perception Modeling
Related Areas
Computer Science
Artificial intelligence
Neural networks
Pattern recognition
Statistics
Mathematics
Psychology
Physiology
Neurophysiology
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28. Visual Perception Modeling
Grand Challenge
Computational models that can mimic biological perception
Biological systems have available through their senses only very limited information about the external word
How can an incomplete description, encoded within neural states, be sufficient to direct the survival and successful adaptive behavior of a living system?
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