3D Shape Its Unique Place in Visual Perception Apr 2008 eBook DDU

RELEASE iNFORMATiON

TiTLE : 3D Shape: Its Unique Place in Visual Perception

AUTHOR : Zygmunt Pizlo

PUBLISHER : The MIT Press

iSBN : 978-0262162517 MAKER : Team DDU

PAGES : 312 Pages PACKAGER : Team DDU

EDiTiON : April 30, 2008 SUPPLiER : Team DDU

LANGUAGE : ENGLISH FORMAT : PDF

RLS DATE : 11/03/2008 SiZE : 3.24 MB

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The uniqueness of shape as a perceptual property lies in the fact

that it is both complex and structured. Shapes are perceived

veridically--perceived as they really are in the physical world,

regardless of the orientation from which they are viewed. The

constancy of the shape percept is the sine qua non of shape

perception; you are not actually studying shape if constancy cannot

be achieved with the stimulus you are using. Shape is the only

perceptual attribute of an object that allows unambiguous

identification. In this first book devoted exclusively to the

perception of shape by humans and machines, Zygmunt Pizlo describes

how we perceive shapes and how to design machines that can see

shapes as we do. He reviews the long history of the subject,

allowing the reader to understand why it has taken so long to

understand shape perception, and offers a new theory of shape.

Until recently, shape was treated in combination with such other

perceptual properties as depth, motion, speed, and color. This

resulted in apparently contradictory findings, which made a

coherent theoretical treatment of shape impossible. Pizlo argues

that once shape is understood to be unique among visual attributes

and the perceptual mechanisms underlying shape are seen to be

different from other perceptual mechanisms, the research on shape

becomes coherent and experimental findings no longer seem to

contradict each other. A single theory of shape perception is thus

possible, and Pizlo offers a theoretical treatment that explains

how a three-dimensional shape percept is produced from a two-

dimensional retinal image, assuming only that the image has been

organized into two-dimensional shapes. Pizlo focuses on

discussion of the main concepts, telling the story of shape without

interruption. Appendixes provide the basic mathematical and

computational information necessary for a technical understanding

of the argument. References point the way to more in-depth reading

in geometry and computational vision.

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