Advertisement

Digital Processing of Acoustical Holograms

  • C. S. Clark
  • A. F. Metherell

Abstract

Acoustical holograms recorded at 1 MHz using the McDonnell Douglas medical imaging system were digitized into 1024 × 1024 elements and 64 grey levels (6 bits). Digital processing, similar to that used in conventional digital image processing, was employed in the acoustical hologram plane rather than the reconstructed image plane to improve the image signal-to-noise ratio and to perform other image manipulations. The analysis and experimental results obtained comparing processed and unprocessed images are presented.

Keywords

Point Spread Function Digital Image Processing Image Restoration Digital Processing Image Code 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. W. Cooley and J. W. Tukey, “An Algorithm for the Machine Calculation of Complex Fourier Series,” Math Computation, Vol 19, pp. 297–301, April 1965.MathSciNetzbMATHCrossRefGoogle Scholar
  2. 2.
    W. K. Pratt, J. Kane, and H. C. Andrews, “Hadamard Transform Image Coding,” Proc. IEEE, Vol 57, No. 1, pp. 58–68, January 1969.CrossRefGoogle Scholar
  3. 3.
    H. C. Andrews and W. K. Pratt, “Transform Image Coding,” Polytechnic Institute o of Brooklyn, Internat. Symp. Computer Processing in Communications, April 1969. Polytechnic Instit. Brooklyn, New York, 1969.Google Scholar
  4. 4.
    H. C. Andrews, A. G. Tescher, Richard P. Kruger, “Image Processing by Digital Computer,” IEEE Spectrum, Vol 9, No. 7, July 1972, pp. 20–32.CrossRefGoogle Scholar
  5. 5.
    J. W. Goodman, Introduction to Fourier Optics, New York, McGraw-Hill, 1968.Google Scholar
  6. 6.
    H. C. Andrews, and W. K. Pratt, “Ditial Computer Simulation of Coherent Optical Processing Operations,” IEEE Computer Group News, Vol 2, pp. 12–19, Nov. 1968.Google Scholar
  7. 7.
    W. B. Davenport, Jr., and W. L. Root, Random Signals and Noise, New York, McGraw-Hill, 1968.Google Scholar
  8. 8.
    E. L. Hall, R. P. Kruger, S. J. Dwyer, III, D. L. Hall, R. W. McLaren, and G. S. Lodwick, “A Survey of Preprocessing and Feature Extraction Techniques for Radiographic Images,” IEEE Transactions on Computers, Vol C-20, No. 9, pp. 1032–1044, Sept 1971.CrossRefGoogle Scholar
  9. 9.
    S. Lowenthal and H. Arsenault, “Image Formation for Coherent Diffuse Objects: Statistical Properties,” J.O.S.A., pp. 1478–1483, Nov 1970.Google Scholar
  10. 10.
    A. V. Oppenheim, R. W. Shafer, and T. G. Stockhom, Jr., “ Nonlinear Filtering of Multiplied and Convolved Signals ,”Proc. IEEE, Vol 56, pp. 1264–1291, Aug 1968.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • C. S. Clark
    • 1
  • A. F. Metherell
    • 1
  1. 1.Actron Industries, Inc.MonroviaUSA

Personalised recommendations