Enhancing the discrimination capability of phase only filter

This paper establishes the equivalence of the phase only filter and a complexvalued neural network, and then shows how neural network learning can be utilized to enhance the capability of phase-only-filter based system. Specifically, the capability of phase only filters in pattern matching tasks is enhanced by using complex-valued, neural network learning algorithms. By incorporating the neural network based learning, the recognition capability of phase only filter under various transformation and distortions can be enhanced.