Abstract
The Fast Fourier Transform (FFT) is used to characterize textural features of 29 kinds of lace. A two-dimensional (2-D) power spectrum is derived from the FFT of a digitized lace image captured by a CCD camera. To describe the radial frequency (f) distribution of the 2-D power spectrum, a one-dimensional (1-D) power spectrum, P(f), is derived from the 2-D power spectrum. Since there is a good linear relation between log P(f) and log/for all the laces used in tis study, we estimated the slope of a line, at, for each of them. The a-value is the coefficient of the 1/fα fluctuation. The 1/fα fluctuation is discussed in relation to the beauty and the comfort of lace patterns.
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