Simplified method of estimating noise-power spectra

Kenneth M. Hanson

doi:10.1117/12.317023

24 July 1998 Simplified method of estimating noise-power spectra

Kenneth M. Hanson

Proceedings Volume 3336, Medical Imaging 1998: Physics of Medical Imaging; (1998) https://doi.org/10.1117/12.317023
Event: Medical Imaging '98, 1998, San Diego, CA, United States

Abstract

A technique to estimate the radial dependence of the noise power spectrum of images is proposed in which the calculations are conducted solely in the spatial domain of the noise image. The noise power spectrum averaged over a radial spatial- frequency interval is obtained from the variance of a noise image that has been convolved with a small kernel that approximates a Laplacian operator. Recursive consolidation of the image by factors of two in each dimension yields estimates of the noise power spectrum over that full range of spatial frequencies.

Citation Download Citation

Kenneth M. Hanson "Simplified method of estimating noise-power spectra", Proc. SPIE 3336, Medical Imaging 1998: Physics of Medical Imaging, (24 July 1998); https://doi.org/10.1117/12.317023

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