325785.fig.007a
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325785.fig.007b
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325785.fig.007c
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325785.fig.007d
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325785.fig.007e
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325785.fig.007f
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325785.fig.007g
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325785.fig.007h
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325785.fig.007i
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325785.fig.007j
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325785.fig.007k
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325785.fig.007l
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325785.fig.007m
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325785.fig.007n
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325785.fig.007o
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325785.fig.007p
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Figure 7: Texture-enhancement capability comparison. (a) original image, (b) the nonlinearly enhancing the high-frequency components by Butterworth filter, (c) general fractional differentiation of 0 . 6 order, (d) enhanced image by FDD operator of 0 . 8 order, (e) original image, (f) the nonlinearly enhancing the high-frequency components by Butterworth filter, (g) general fractional differentiation of 0 . 8 order, (h) enhanced image by FDD operator of 0 . 8 order, (i) original image, (j) the nonlinearly enhancing the high-frequency components by Butterworth filter, (k) general fractional differentiation of 0 . 7 order, (l) enhanced image by FDD operator of 0 . 3 order, (m) original image, (n) the nonlinearly enhancing the high-frequency components by Butterworth filter, (o) general fractional differentiation of 0 . 6 order, and (p) enhanced image by FDD operator of 0 . 9 order.