### Description

The discrete Fourier transform changes an image from the spatial domain into the frequency domain, where each pixel represents a sinusoidal function. This example shows an image and its power spectrum displayed using a logarithmic transfer function.

!!! info
    See [Figure 10-10](../../../VTKBook/10Chapter10/#Figure%2010-10) in [Chapter 10](../../../VTKBook/10Chapter10) the [VTK Textbook](../../../VTKBook/01Chapter1).
