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OPTICAL ILLUSIONS

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OPTICAL ILLUSIONS. BY. KAMILLE C. HERNANDEZ. 6/7/09. 2 ... ILLUSION ? ... OPTICAL ILLUSIONS WORK. BY EXPLOITING. VISUAL CUES. SOME MONOCULAR CUES ... – PowerPoint PPT presentation

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Title: OPTICAL ILLUSIONS


1
OPTICAL ILLUSIONS
  • BY
  • KAMILLE C. HERNANDEZ

2
ILLUSIONS AND PERCEPTION
  • ILLUSIONS DEPEND ON PERCEPTION
  • PERCEPTION HAS THREE LINKS

3
THREE LINKS TO PERCEPTION
EXTERNAL / PHYSICAL
VISUAL APARATUS
INTERPRETATION OF STIMULUS
4
WHAT IS AN OPTICAL ILLUSION ?
  • illusions that deceive the human visual system
    into perceiving something that is not present or
    incorrectly perceiving what is present.

5
TWO TYPES
  • PHYSIOLOGICAL ILLUSIONS
  • COGNITIVE VISUAL ILLUSIONS

6
A PHYSIOLOGICAL ILLUSION
  • is the what happens to the eyes as a result of
    prolonged stimulation. i.e. brightness, tilt,
    movement, color etc.
  • repetitive stimulation misleads the visual
    system in the early stages of visual processing.

7
A COGNITIVE VISUAL ILLUSION
  • Exploits the predictive cues of early visual
    processing.
  • Misdirects in-built assumptions or knowledge
    while processing.

8
Three Types of Visual Illusions
  • Ambiguous Illusions
  • Distorting Illusions
  • Paradox illusions/
  • /Fictitious illusions.

9
OPTICAL ILLUSIONS WORK BY EXPLOITING VISUAL
CUES
  • SOME MONOCULAR CUES
  • Texture Gradient
  • Relative Motion Parallax
  • Linear Perspective
  • Light and Shadow
  • Relative Size

10
OPTICAL ILLUSIONS WORK BY EXPLOITING VISUAL
CUES
  • Some Binocular Cues
  • Binocular Disparity
  • Convergence
  • Accommodation

11
SOME COOL ILLUSIONS
  • MY SPEECH TIME
  • SLIDE EXPLAINATIONS
  • CLASS PARTICIPATION

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THE END
  • REFERENCES
  • INTERNET
  • TEXTBOOK
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