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Proceedings Paper

A Cross-Power Spectral Method For Improved Measurement Of Film Noise Power Spectra
Author(s): Y. Lee; P. L. P. Dillon
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Paper Abstract

A cross-power spectral method is described for the separation of the scanning system noise spectrum from the film noise spectrum in a film measuring system. This method provides a more accurate way to measure the true film noise spectrum. The spectral separation is done in two steps: (1) Two samples are taken at each sample position on the film to produce a pair of independently sampled data arrays. (2) The cross-power spectrum is then computed from this pair of arrays using the fast Fourier transforin(FFT) technique. Since film noise and scanner noise are uncorrelated, it is shown that this cross-power spectrum is an estimate of the film noise spectrum. The use of this technique is demonstrated using simulated film data.

Paper Details

Date Published: 1 January 1987
PDF: 9 pages
Proc. SPIE 0767, Medical Imaging, (1 January 1987); doi: 10.1117/12.967004
Show Author Affiliations
Y. Lee, Eastman Kodak Company (United States)
P. L. P. Dillon, Eastman Kodak Company (United States)

Published in SPIE Proceedings Vol. 0767:
Medical Imaging
Samuel J. Dwyer; Roger H. Schneider, Editor(s)

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