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Efficient deformable filter banks

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3 Author(s)
Manduchi, R. ; Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA ; Perona, P. ; Shy, D.

This article describes efficient schemes for the computation of a large number of differently scaled/oriented filtered versions of an image. We generalize the well-known steerable/scalable (“deformable”) filter bank structure by imposing X-Y separability on the basis filters. The resulting systems, designed by an iterative projections technique, achieve substantial reduction of the computational cost. To reduce the memory requirement, we adopt a multirate implementation. Due to the inner sampling rate alteration, the resulting structure is not shift invariant. We introduce a design criterion for multirate deformable structures that jointly controls the approximation error and the shift variance

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Signal Processing, IEEE Transactions on  (Volume:46 ,  Issue: 4 )