Optical IllusionOptical Illusion

Presentation byPresentation by

Sharon K. BriggsSharon K. Briggs

Computer Science 30Computer Science 30

George Washington UniversityGeorge Washington University

Optical IllusionOptical Illusion

Trompe L’Oeil is another name for Optical Trompe L’Oeil is another name for Optical Illusion which means fooling the eyeIllusion which means fooling the eye

The National Gallery of Art had an exhibit The National Gallery of Art had an exhibit called called Deceptions and Illusions: Five Deceptions and Illusions: Five Centuries of Trompe L’Oeil Painting Centuries of Trompe L’Oeil Painting at the at the end of last year which ended early March.end of last year which ended early March.

http://www.nga.gov/home.htmhttp://www.nga.gov/home.htm

Tricking the eye has been around for Tricking the eye has been around for centuriescenturies

1570 Ludger Tom Ring the 1570 Ludger Tom Ring the YoungerYounger

1760 Luis Melendez oil on 1760 Luis Melendez oil on canvas Still Life with Figs and canvas Still Life with Figs and

BreadBread

What causes optical Illusion?What causes optical Illusion?

Depth perception and binocular Depth perception and binocular disparity is developed in infants disparity is developed in infants between the ages of 3 ½ to 6 months.between the ages of 3 ½ to 6 months.

Optical Illusion takes place in the brain Optical Illusion takes place in the brain rather than in the eyes.rather than in the eyes.

How do we know this?How do we know this?

With the emerging technology and With the emerging technology and computers in the 1960’s Psychologist computers in the 1960’s Psychologist attached electrodes to infants’ heads,attached electrodes to infants’ heads,which were attached to computers. which were attached to computers.

Those computers measured the Those computers measured the electrical impulses that are used by electrical impulses that are used by the brain when it is active.the brain when it is active.

Entertainment From The Entertainment From The PastPast

Charles Charles Wheatstone Wheatstone Developed the first Developed the first stereoscope in stereoscope in 18381838

Entertainment NowEntertainment Now

http://www.cs.brown.edu/stc/http://www.cs.brown.edu/stc/home.htmlhome.html

Your eyes want to complete the Your eyes want to complete the lines. This picture was found lines. This picture was found on the web site for my on the web site for my Psychology class. Psychology class.

Now we can use the Now we can use the internet to find Optical internet to find Optical Illusions with search Illusions with search engines or create your own.engines or create your own.

Ask JeevesAsk JeevesGoogleGoogleNorthern LightNorthern LightYahooYahoo

Found with Ask JeevesFound with Ask JeevesGrand IllusionsGrand Illusions

Welcome to Grand Illusions, the site for the enquiring mind. Welcome to Grand Illusions, the site for the enquiring mind. With optical illusions, scientific toys, visual effects, and even a With optical illusions, scientific toys, visual effects, and even a

little magic. little magic.

The below can be found in:The below can be found in:Ask JeevesAsk JeevesGoogleGoogleYahooYahoo

Sandlot ScienceSandlot ScienceInteractive optical illusions, games, Interactive optical illusions, games, science projects, fun puzzles, and science projects, fun puzzles, and distortions.distortions.

Our you can make your own on Our you can make your own on your PC with the Paint your PC with the Paint

Program.Program.

Next are just a few of my Next are just a few of my favorite Optical Illusions found favorite Optical Illusions found

eithereitheron the web or on the web or

from my Psychology class.from my Psychology class.

Old or Old or Young.Young.

Which is it?Which is it?

The below picture is from my The below picture is from my Psychology Professors slide Psychology Professors slide

show.show.

Optical Illusion can be found in Optical Illusion can be found in every day lifeevery day life

Your homeYour home ClothingClothing ArchitectureArchitecture

Your HomeYour Home

Bedroom (locate with Bedroom (locate with any search engine.any search engine. http://http://

groups.msn.com/groups.msn.com/QuiltingAroundtheWorld QuiltingAroundtheWorld

Your walls (locate with Your walls (locate with any search engine.any search engine. Shop for Shop for PaintingsPaintings at at

MSN Shopping MSN Shopping

ClothingClothing

You can find You can find information on the information on the Internet that can Internet that can tell you how to tell you how to dress to look your dress to look your best by Optical best by Optical Illusion.Illusion.

TallerTaller Avoid problem areasAvoid problem areas So and so on.So and so on. For both men and For both men and

womenwomen

ArchitectureArchitecture

Was drawn by hand in the past: Was drawn by hand in the past: ParthenonParthenon

ArchitectureArchitecture

Now Computer Now Computer Assisted Drafting Assisted Drafting and Design is used.and Design is used.

In other words CADDIn other words CADD

This has not been This has not been round that long round that long 80’s.80’s.