1 September 1990 Design considerations for low clutter, distortion invariant correlation filters
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Distortion invariant pattern recognition in optical correlators is explored using a linear vector space formalism. Special attention is given to filter design and methods for reducing the clutter problem. The following three constraints are shown to play an important role in the filter's performance: (1) maximize energy projected from the training set onto the filter, (2) use of bipolar filters, and (3) use of higher dimensional filters. An example algorithm for constructing a distortion invariant filter based on these constraints is also given.
Gregory O. Gheen, "Design considerations for low clutter, distortion invariant correlation filters," Optical Engineering 29(9), (1 September 1990). https://doi.org/10.1117/12.55693 . Submission:


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