127.

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5.2.2 Wedge and ring filtering—an example

The Fourier power spectrum of the test image (Figure 5.10b) is shown in Figure 5.14a. It is clear that the higher values (indicated by bright areas)

Figure 5.14 (a) Fourier power spectrum of Figure 5.10b. (b) After ring filtering with the range [30, 100]. (c) Image derived by wedge filtering within the angle range [22.5°, −22.5°]. See text for further discussion.

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