David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Ezio Di Nucci
Jack Alan Reynolds
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Behavioral and Brain Sciences 21 (4):449-467 (1998)
Intelligent systems are faced with the problem of securing a principled (ideally, veridical) relationship between the world and its internal representation. I propose a unified approach to visual representation, addressing both the needs of superordinate and basic-level categorization and of identification of specific instances of familiar categories. According to the proposed theory, a shape is represented by its similarity to a number of reference shapes, measured in a high-dimensional space of elementary features. This amounts to embedding the stimulus in a low-dimensional proximal shape space. That space turns out to support representation of distal shape similarities which is veridical in the sense of Shepard's (1968) notion of second-order isomorphism (i.e., correspondence between distal and proximal similarities among shapes, rather than between distal shapes and their proximal representations). Furthermore, a general expression for similarity between two stimuli, based on comparisons to reference shapes, can be used to derive models of perceived similarity ranging from continuous, symmetric, and hierarchical, as in the multidimensional scaling models (Shepard, 1980), to discrete and non-hierarchical, as in the general contrast models (Tversky, 1977; Shepard and Arabie, 1979)
|Keywords||affordance categorization constancy distal/proximal stimulus features invariance isomorphism mental models perception representation similarity visual shape recognition|
|Categories||categorize this paper)|
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O. Shagrir (2012). Structural Representations and the Brain. British Journal for the Philosophy of Science 63 (3):519-545.
Shimon Edelman & Nathan Intrator (2003). Towards Structural Systematicity in Distributed, Statically Bound Visual Representations. Cognitive Science 23 (1):73-110.
D. I. Perrett, M. W. Oram & E. Ashbridge (1998). Evidence Accumulation in Cell Populations Responsive to Faces: An Account of Generalisation of Recognition Without Mental Transformations. Cognition 67 (1-2):111-145.
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