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Space perception and Binocular Vision

# Space perception and Binocular Vision - 6 6 Space...

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6 Space Perception and Binocular Vision Chapter 6 6 Space Perception and Binocular Vision • Introduction to Space Perception • Monocular Cues to Three-Dimensional Space • Binocular Vision and Stereopsis • Combining Depth Cues 6 Introduction to Space Perception Realism: The external world exists. – Positivists: The world depends on the evidence of the senses; it could be a hallucination!

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6 Introduction to Space Perception Euclidian geometry: Parallel lines remain parallel as they are extended in space. – Objects maintain the same size and shape as they move around in space. – Internal angles of a triangle always add to 180 degrees, etc. 6 Euclidean Geometry and the Retina 6 Introduction to Space Perception Binocular summation: An advantage in detecting a stimulus that is afforded by having two eyes rather than just one.
6 Introduction to Space Perception The two retinal images of a three-dimensional world are not the same! 6 Introduction to Space Perception Binocular disparity: The differences between the two retinal images of the same scene. It is the basis of stereopsis; a vivid perception of the three-dimensionality of the world that is not available with monocular vision. 6 Introduction to Space Perception Monocular depth cues vs. Binocular depth cues: One eye vs. two eyes. Binocular depth cues provide: – Convergence. – Stereopsis. – Ability of two eyes to see more of an object than one eye.

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6 Monocular Cues to Three-Dimensional Space Occlusion: A cue to relative depth order when, for example, one object obstructs the view of part of another object. 6 Monocular Cues to Three-Dimensional Space Nonmetrical depth cue vs. Metrical depth cue – Nonmetrical: Provides information about the depth order (relative depth) but not depth magnitude (e.g., his nose is in front
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Space perception and Binocular Vision - 6 6 Space...

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