optical illusions

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optical illusions

  1. 1. OPTICAL ILLUSIONS BY KAMILLE C. HERNANDEZ 05/09/11
  2. 2. ILLUSIONS AND PERCEPTION <ul><li>ILLUSIONS DEPEND ON PERCEPTION </li></ul><ul><li>PERCEPTION HAS THREE LINKS </li></ul>05/09/11
  3. 3. 05/09/11 THREE LINKS TO PERCEPTION VISUAL APARATUS EXTERNAL / PHYSICAL INTERPRETATION OF STIMULUS
  4. 4. WHAT IS AN OPTICAL ILLUSION ? <ul><li>illusions that deceive the human visual system into perceiving something that is not present or incorrectly perceiving what is present. </li></ul>05/09/11
  5. 5. TWO TYPES <ul><li>PHYSIOLOGICAL ILLUSIONS </li></ul><ul><li>COGNITIVE VISUAL ILLUSIONS </li></ul>05/09/11
  6. 6. A PHYSIOLOGICAL ILLUSION <ul><li>is the what happens to the eyes as a result of prolonged stimulation. i.e. brightness, tilt, movement, color etc. </li></ul><ul><li>repetitive stimulation misleads the visual system in the early stages of visual processing. </li></ul>05/09/11
  7. 7. A COGNITIVE VISUAL ILLUSION <ul><li>Exploits the predictive cues of early visual processing. </li></ul><ul><li>Misdirects in-built assumptions or knowledge while processing. </li></ul>05/09/11
  8. 8. Three Types of Visual Illusions <ul><li>Ambiguous Illusions </li></ul><ul><li>Distorting Illusions </li></ul><ul><li>Paradox illusions/ </li></ul><ul><li>/Fictitious illusions. </li></ul>05/09/11
  9. 9. OPTICAL ILLUSIONS WORK BY EXPLOITING VISUAL CUES <ul><ul><ul><ul><ul><li>SOME MONOCULAR CUES </li></ul></ul></ul></ul></ul><ul><li>Texture Gradient </li></ul><ul><li>Relative Motion Parallax </li></ul><ul><li>Linear Perspective </li></ul><ul><li>Light and Shadow </li></ul><ul><li>Relative Size </li></ul>05/09/11
  10. 10. OPTICAL ILLUSIONS WORK BY EXPLOITING VISUAL CUES <ul><li>Some Binocular Cues </li></ul><ul><li>Binocular Disparity </li></ul><ul><li>Convergence </li></ul><ul><li>Accommodation </li></ul>05/09/11
  11. 11. SOME COOL ILLUSIONS <ul><li>MY SPEECH TIME </li></ul><ul><li>SLIDE EXPLAINATIONS </li></ul><ul><li>CLASS PARTICIPATION </li></ul>05/09/11
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  69. 69. THE END <ul><li>REFERENCES </li></ul><ul><li>INTERNET </li></ul><ul><li>TEXTBOOK </li></ul>05/09/11

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