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Frequency spectrum – display frequency spectrum plots for 3D surfaces with x and y, wavelength, angle, magnitude and phase – display 2D frequency spectrum plots for 2D profiles with wavelength, magnitude and phase.

Power spectral density – display the power spectral density plot and select the vertical scale and measurement location interactively (3D surfaces and 2D profiles).

Surface isotropy, directionality and periodicity – calculate isotropy, periodicity, period and period direction – view dominant surface directions on a compass rose.

Autocorrelation and intercorrelation – study 3D surface and 2D profile autocorrelation and intercorrelation.

Detect smaller spectral structures – use Hann windows to eliminate stray spectral lines.

Denoising – filter noisy profiles and surfaces by editing the FFT plot directly within selected upper and lower bounds.

Continuous wavelet decomposition – visualize the scales and spatial locations where phenomena occur on 2D profiles – use Coiflet 1-5, Daubechies 1-10, Discrete Meyer, Gauss 1-8, Mexican Hat, Morlet and Symlet 1-8 wavelet.

Discrete wavelet filtering – decompose a 2D profile or 3D surface into a set of profiles or surfaces at different levels of scale – select the scale levels for inclusion in the roughness profile and hence the waviness profile – use Coiflet, Daubechies, Discrete Meyer, Spline and Symlet wavelet families (wavelet spline filtering is an advanced filtering technique defined in ISO 16610).

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