The research described in this chapter concerns the role of reference frames in perceiving
the shape and orientation of objects. Ultimately, I describe some experiments I have done to …

Recent work on computer vision suggests that viewpoint-independent representation of
objects can be achieved by imposing a canonical reference frame and by describing the …

Bon nombre de théories de reconnaissance des objets posent en principe que les objets
sont encodés par rapport à un cadre de référence perceptive, mais on connaît peu de …

Much of the empirical work focusing on the perception of rotated visual shapes has centered
on resolving an ongoing theoretical debate in which there have been two poles. At one …

La perception des objets demeure constante dans la plupart des cas de variabilité de
l'image rétinienne. Une des façons d'obtenir une telle constance est de présenter les objets …

Five experiments are reported that test a symmetry theory of contextual effects on the
perceived shape of a class of ambiguous figures. The theory assumes that at least some …

Three experiments are reported in which it is tested whether the Gestalt effect of configural
orientation on shape perception operates on two-dimensional (2-D) or three-dimensional (3 …

How do we recognize objects despite differences in their retinal projections when they are
seen at different orientations? Marr and Nishihara (1978) proposed that shapes are …

Despite the fact that we necessarily view objects from one particular position, we generally
achieve representations of them that transcend that special viewpoint. Shape constancy can …

Five studies examined the use of scene-based and viewer-centered (ie, head-or retina-
based) representations for comparing shapes at different orientations. Two objects that …