e178-L10.ppt

e178-L10.ppt - Frequency Domain Processing Reading: 4.1...

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Frequency Domain Processing 1 Frequency Domain Processing Reading: 4.1 basics/intro • 4.2 (we already covered much of this). • 4.3 Sampling (we discussed this last week) • 4.4, 4.5: DFT, class notes should be good • 4.6 DFT properties, see the h/w. • 4.7-4.9 Filtering in frequency domain, Homomorphic filtering Frequency Domain Processing 2 Recap: Fig 4.1

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Frequency Domain Processing 3 An example: Fig 4.2 Frequency Domain Processing 4 Fig 4.3
Frequency Domain Processing 5 Basic Scheme Frequency Domain Processing 6 An image and its DFT: Fig 4.4

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Frequency Domain Processing 7 Notch filter: Fig 4.6 Frequency Domain Processing 8 filtering
Frequency Domain Processing 9 High-pass filtering Frequency Domain Processing 10 Gaussian filters

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Frequency Domain Processing 11 Gaussian functions H ( u ) = A exp( u 2 / 2 σ 2 ) h ( x ) = 2 π A exp( 2 2 2 x 2 ) • Fourier transform of a Gaussian is a Gaussian. • Gaussian functions have some interesting
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This note was uploaded on 12/28/2011 for the course ECE 178 taught by Professor Manjunath during the Fall '08 term at UCSB.

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e178-L10.ppt - Frequency Domain Processing Reading: 4.1...

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