'Highpass filters' presentation slideshows

Chapter 4

Chapter 4. Image Enhancement in the Frequency Domain. Fourier Transform. 1-D Fourier Transform 1-D Discrete Fourier Transform (DFT) Magnitude Phase Power spectrum. 2D DFT. Definition:. if f(x,y) is real. Centered Fourier Spectrum. It can be shown that:. Example. SEM Image.

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Image Processing

Image Processing. Image Enhancement in the Frequency Domain Part III. Some Basic Filters. Low frequencies in the Fourier transform are responsible for the general gray-level appearance of an image over smooth areas. High frequencies are responsible for detail such as edges and noise.

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Frequency Domain Processing (part 2) and Filtering

566 views • 24 slides