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Laboratory of Image Processing

Laboratory of Image Processing. Pier Luigi Mazzeo pierluigi.mazzeo@cnr.it July 24, 2014. The Fourier Transform with images. Display the obtained fft image. Download from my website the fftshow function , put it in your work directory. The fft examples. The fft examples.

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Laboratory of Image Processing

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  1. Laboratory of Image Processing Pier Luigi Mazzeo pierluigi.mazzeo@cnr.it July 24, 2014

  2. The Fourier Transform with images Display the obtainedfft image Download from my website the fftshowfunction, put itin your work directory

  3. The fft examples

  4. The fft examples fftshow(cf, ‘log’) Try with thiscircle (itsedgeappearsburred). Whatdoeshappen?

  5. Filtering in the frequency domain (LP) • Try to use differentcut off (i.e. 5 and 30). • Try to use a circle with a gentlecutoff (i.e. b).

  6. Filtering in the frequency domain (HP) • Try to use differentcut off (i.e. 5 and 30). • Try to use a circle with a gentlecutoff (i.e. b).

  7. Gaussian filtering

  8. Gaussian filtering HP(cont.)

  9. Butterworthfiltering

  10. Butterworthfiltering (cont.)

  11. Butterworthfiltering (cont.)

  12. Butterworthfiltering (cont.)

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