Paper
A Parallel Computation that Assigns Canonical Object-Based Frames of Reference
Published Aug 24, 1981 · Geoffrey E. Hinton
223
Citations
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Abstract
A viewpoint-independent description of the shape of an object can be generated by imposing a canonical frame of reference on the object and describing the spatial dispositions of the parts relative to this object-based frame. When a familiar object is in an unusual orientation, the deciding factor in the choice of the canonical object-based frame may be the fact that relative to this frame the object has a familiar shape description. This may suggest that we first hypothesise an object-based frame and then test the resultant shape description for familiarity. However, it is possible to organise the interactions between units in a parallel network so that the pattern of activity in the network simultaneously converges on a representation of the shape and a representation of the object-based frame of reference. The connections in the network are determined by the constraints inherent in the image formation process.
A parallel network can simultaneously converge on a representation of an object's shape and its object-based frame of reference, resulting in a viewpoint-independent description of its shape.
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