Masking High Pass Filtering Effect on Discrete Fourier Analysis of Connective Tissue Orientation

Since the power spectrum in the low-frequency terms in the discrete Fourier transform is limited, selectivity of the directionality in the low-frequency area is low. Removal of low-frequency terms (masking of low-frequency, high-pass filtering) is often used to obtain better angular selectivity because of the lower angular selectivity in the low-frequency terms. Intensity of orientation, F(6), is often calculated as

The distribution function, /(6), is calculated as /(6)= (Fig. 7)-

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