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Butterworth highpass - PowerPoint PPT Presentation

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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Chapter 4 cont.

Chapter 4 cont. Filters in the Frequency Domain. Filters in the Frequency Domain. Image Smoothing Using Frequency Domain Filters: Ideal Lowpass Filters Butterworth Lowpass Filters Gaussian Lowpass Filters . Image sharpening Using Frequency Domain Filters: Ideal Highpass Filters

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Butterworth highpass - PowerPoint PPT Presentation

Chapter 4

Chapter 4 cont.