Optimal Phase-Only Filters

Abstract

This report summarizes the results obtained during the contract No. F 19628-88-K-0018 entitled 'Optimal Phase-only Filters'. This research was focused on Phase-only Filters (POFs) and Binary Phase-only Filters (BPOFs). We prove in this report that the conventional POF introduced originally by Horner and Gianino is indeed the best among all POFs from the viewpoint of maximizing the Signal-to-Noise Ratio (SNR). We also illustrate the importance of selecting the optimal support function for the POF and show with the help of example images that output SNR can be improved considerably (by about 5 dB) by using optimal POFs (OPOFs). This report describes an efficient algorithm for designing OPOFs. Because of their suitability for binary Spatial Light Modulators (SLMs) such as the Magneto Optic SLM (MOSLM), binary POFs (BPOFs) are of much interest. In this report, we introduce the optimal BPOF (OBPOF) and present efficient algorithms for designing OBPOFs. Several simulation results based on the use of 32 X 32 images are included to verify the performance of OBPOFs.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1990
Accession Number
ADA225312

Entities

People

  • B. V. Kumar
  • Z. Bahri

Organizations

  • Carnegie Mellon University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Bandwidth
  • Classification
  • Computer Simulations
  • Computers
  • Correlators
  • Cross Correlation
  • Detection
  • Distortion
  • Filters
  • Filtration
  • Noise
  • Optical Correlators
  • Optical Modulators
  • Pattern Recognition
  • Peak Values
  • White Noise

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Image Processing and Computer Vision.