Optical illusion


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history of optical illusion and some art work

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Optical illusion

  1. 1. OPTICAL ILLUSION By Hina mehboob
  2. 2. Optical illusionOptical illusion is visually perceived image that differ from objective reality. Information gathered by the eye is processed in the brain to give a perception that does not tally with a physical measurement of the stimulus source.The word optical means something to do with the eye. The word Illusion meansits something thats not what it seems. So the word OPTICAL ILLUSIONS meanssomething that isnt what it looks like
  3. 3. Types of illusionThere are three main types:• literal optical illusions that create images that are different from the objects that make them,• physiological ones that are the effects on the eyes and brain of excessive stimulation of a specific type (brightness, colour, size, position, tilt, movement), and• cognitive illusions, the result of unconscious inferences.
  4. 4. History Of Optical Illusion
  5. 5. • During the different periods of time different types of optical illusions have become popular. Here are some different examples of all the kinds of illusion art.• A Famous Illusion Back in 1915, a cartoonist named W.E. Hill first published this drawing. Its hard to see what its supposed to be.• Is it a drawing of a pretty young girl looking away from us? Or is it an older woman looking down at the floor?• Well, its both. The key is perception and what you expect to see.• This simple line drawing is titled, "Mother, Father, and daughter" (Fisher, 1968) because it contains the faces of all three people in the title. How many faces can you find?
  6. 6. • Optical illusions work because our minds arent made to view exact cuts or two pictures at the same time. Therefore, our mind shows us an illusion but the main thing that makes an illusions are the colors( If the illusion isnt moving ). Almost everyone sees an illusion each day. For instance, every animation or movie is an illusion. Its just a bunch of still pictures played very quickly at the movies. Its always an illusion (animation or even if its 3D)
  7. 7. • In the 1900s pointillism was a kind of art, created by Gorges Seurat was what looked like an entire picture, but it was made out of tiny dots.
  8. 8. • In a sense all painting is based on tricks of visual perception: using rules of perspective to give the illusion of three-dimensional space, mixing colors to give the impression of light and shadow, and so on. With Optical Art, the rules that the eye applies to makes sense of a visual image are themselves the "subject" of the artwork.
  9. 9. In the 1930s and 40s M.C Esher did pictures of mind boggling pictures
  10. 10. the 1960s, the term "Op Art" was coined to describe the work of a growing groupof abstract painters. was a type of art that looked like it was movingRotatingWedgeIllusion
  11. 11. Black Dot Illusion Count the black dots!
  12. 12. Color and shapesSpontaneous Motion Illusion
  13. 13. Café Wall IllusionAre the horizontal lines parallel or do they slope?
  14. 14. Size IllusionWould you believe that the center circles are the same size?
  15. 15. • In the mid-20th century, some artists experimented with Optical Artwork, although not abstract, also deals extensively with various forms of visual tricks and paradoxes.
  16. 16. textureCan you find the dog?
  17. 17. Oscillating Figure Illusions
  18. 18. Perspective and depthDo you see a cube missing a corner?Or do you see a small cube in a big one?