Handbook of Pattern Recognition and Computer Vision, Pp. 863{882 Viewer-centered Representations in Object Recognition: a Computational Approach

Visual object recognition is a process in which representations of objects are used to identify those objects in images. Recent psychophysical and physiological studies indicate that the visual system uses viewer-centered representations. In this chapter a recognition scheme that uses viewer-centered representations is presented. The scheme requires storing only a small number of views to represent an object. It is based on the observation that novel views of objects can be expressed as linear combinations of the stored views. This method is applied to rigid objects as well as to objects with more complicated structure, such as rigid objects with smooth surfaces and articulated objects.