Orthogonal subspaces for correlation maskingA digital correlation mask that induces orthogonality among a prescribed set of reference imagery is described. In this particular implementation, the resulting correlation is undersampled and shift-variant, though if it is applied to optical correlators, those limitations are removed. A method of introducing orthogonality among the weights among the training set from which filter values are obtained is derived, so that the correlation value from a given filter is representative of the unique nature of the reference object as compared against the other objects in the training class.
Document ID
19910048342
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Juday, Richard D. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Fisher, Timothy E. (NASA Johnson Space Center Houston, TX, United States)