In this paper it is shown how estimates of local structure and orientation can be obtained using a set of spherically separable quadrature lters. The method is applicable to signals of any dimensionality the only requirement being that the lter set spans the corresponding orientation space. The estimates produced are 2:nd order tensors, the size of the tensors corresponding to the dimensionalit...

Merging the outputs of different search engines or information sources in response to a query has been shown to improve performance. In most cases, scores produced by different information sources are not comparable: merging techniques are often segregated into a score normalization step followed by a combination step. The Combination step is usually straight forward and has been an area of act...

homogenates. Some of the limitations of these preparations are: 1) lack of certain inputs and outputs normally existing in the intact brain; 2) certain portions of the sliced tissue, especially the top and bottom surfaces of the slice, are damaged by the slicing action itself; 3) the life span of a brain slice is limited and the tissue gets "older" at a much faster rate than the whole animal; 4...