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. Author manuscript; available in PMC: 2010 Oct 1.
Published in final edited form as: Acad Radiol. 2009 Jun 12;16(10):1171–1178. doi: 10.1016/j.acra.2009.04.009

Figure 1.

Figure 1

(a) Power spectrum using Fourier transform and (b) the line fitting for the curve on average log(P(u,v)) versus log(f (u,v)) . The center of the image is the origin of the frequency coordinate system. f0 , f1 , and f2 are the distance according to frequencies, u and v, from origin of the coordinate system.