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Part 1. Part 1: Sensory Processing Vision Part 2: Other Sensory Systems.

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Presentation on theme: "Part 1. Part 1: Sensory Processing Vision Part 2: Other Sensory Systems."— Presentation transcript:

1 Part 1

2 Part 1: Sensory Processing Vision Part 2: Other Sensory Systems

3 Sensation Vs. Perception

4 Psychophysics Absolute threshold Just Noticeable Difference (JND) –Weber’s Law ∆I/I

5 Transduction The process by which sense organs convert energy from the environmental events into neural activity Receptors: Photoreceptors Hair cells Taste receptor cells Cilia

6 The Visible Spectrum

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9 The Eye Photoreceptor Cells: –Rods –Cones

10 Color Vision Wavelength 3 Types of Cones: –Blue (short) –Green (medium) –Red (long)

11 Theories of Color Vision Young-Helmholtz Trichromatic Theory Opponent Process Theory –Negative Afterimages

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17 Defects in Color Vision Red/Green Color Blindness Blue/Yellow Color Blindness Cerebral Achromatopsia

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19 Perception of Form Primitive Features Figure and Background (Ground) Gestalt Psychology and Perceptual Grouping

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23 Perception of Form Law of Proximity:

24 Perception of Form Law of Similarity: X X X O O O X X X O O O X X X XXXXXXXXXXXXXXXOOOOOOOOOOOOOOOXXXXXXXXXXXXXXXOOOOOOOOOOOOOOO

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26 Perception of Form Law of Continuity:

27 Perception of Form Law of Closure:

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30 Perception of Form Law of Pragnanz (Good Figure):

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32 Types of Processing Top Down Processing Bottom Up Processing

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34 Depth Perception Binocular Cues Monocular Cues

35 Binocular Cues Retinal Disparity Convergence

36 Monocular Cues Interposition Linear Perspective Relative Size Texture Gradient Relative Motion –Motion Parallax

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43 Some Fun Visual Illusions


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