| Summary: | 碩士 === 高雄醫學大學 === 心理學研究所 === 97 === In our living environment is surrounded by various objects. Recognizing objects by vision is the basic ability of human when we are interacting with environment. In vision, constructing objects’ surface structure in depth is important (Marr, 1982).The objects’ surface may be smooth, or having different depth.(convex and concave) In nature, there usually have multiple depth information on a object. We may perceive the object’s surface depth as the result of combination of multiple depth information. Landy, Maloney, Johnston and Young(1995) thought that depth perception is the result of linear combination by each cues in bottom-up process. But in depth inversion illusion (Yellott & Kaiwi, 1979), the linear combination of each cue in bottom-up process may point the object’s surface as concave, but finally, we perceived convex surface. In this case, the bottom-up process can’t explain completely how depth perception form. Depth inversion illusion is an result of multiple depth information combined affecting by information from bottom- up and top-down process. In this research, we used depth inversion illusion to characterize how object knowledge, shadow and binocular disparity combined and formed depth perception. The result, the object knowledge was not always superior in depth perception. Familiarity of object’s surface depth, shape, texture, and structure complexity would affect the knowledge of object too. They also affected the structure of shadow. The effect of shadow is not the same in human face and other objects, it’s meaning that information combine nonlinearly.
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