Shows visual effect and other so many

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OPTICAL ILLUSIONS
BY
KAMILLE C. HERNANDEZ

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

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THREE LINKS TO PERCEPTION
VISUAL APARATUS
EXTERNAL / PHYSICAL
INTERPRETATION OF STIMULUS

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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.

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TWO TYPES
• PHYSIOLOGICAL ILLUSIONS
• COGNITIVE VISUAL ILLUSIONS

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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.

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

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

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OPTICAL ILLUSIONS WORK
BY EXPLOITING
VISUAL CUES
SOME MONOCULAR CUES
1. Texture Gradient
2. Relative Motion Parallax
3. Linear Perspective
4. Light and Shadow
5. Relative Size

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

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

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THE END
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