Ch04%20Perceiving and Recognizing Objects

Ch04%20Perceiving and Recognizing Objects - 4 4 Perceiving...

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4 Perceiving and Recognizing Objects Chapter 4 4 Perceiving and Recognizing Objects • Finding edges • Grouping and texture segmentation • Figure–Ground assignment • Edges, parts, and wholes • Object recognition • Objects in the brain • Development of object perception 4 What Do You See?
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4 What Do You See? Do you think it is the same house you saw in the previous picture? 4 What Do You See? A more abstract house. Paul Cezanne’s Château Noir. 4 Middle Vision How do we organize simple lines and edges into shapes, planes and texture? Objects Planes Edges High Vision Middle Vision Low Vision
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4 Finding Edges How does the visual system finds edges and puts them together to form shapes, surfaces and planes? 4 The computer does a poor job at identifying edges. Finding Edges 4 Creating Edges Perception of edges when edges are not drawn are called illusory contours.
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4 Finding Edges Many computer algorithms are available to translate into edges. 4 Finding Edges Sensation and Perception Class 2007 4 Rules for Making Contours Structuralists suggested that atoms of sensation summed up to form perceptual contours.
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4 Rules for Making Contours Gestalt psychologists on the other hand suggested that perceptual whole was more than the sum of its sensory parts (atoms). And formulated what are called the rules of perceptual groupings (Wertheimer, Köhler, Koffka (1920s–1950s); Palmer and Rock (1990s). 4
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Ch04%20Perceiving and Recognizing Objects - 4 4 Perceiving...

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