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Cropped and b&amp;w version of <a href="https://en.wikipedia.org/wiki/Mona_Lisa" class="extiw" title="en:Mona Lisa">Mona Lisa</a>. Used to show how the FFT of an image behaves. (FFT of this image at <a href="//commons.wikimedia.org/wiki/File:Mona_Lisa_bw_square_fft.jpeg" title="File:Mona Lisa bw square fft.jpeg">File:Mona Lisa bw square fft.jpeg</a>)</div>
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Modified by Francesco Santini</div>
Commons