filtering2.slides.printing

filtering2.slides.printing - Low-Pass Filtering Low-Pass...

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Unformatted text preview: Low-Pass Filtering Low-Pass Filtering CS 450: Introduction to Digital Signal and Image Processing Bryan Morse BYU Computer Science Low-Pass Filtering Introduction Low-Pass Filtering I Low-pass filtering smooths a signal or image I Low frequency components = gradual transitions I High frequency components = rapid transitions (edges, texture, etc.) I Remember: smoothing helps remove noise I Can also be used to target specific types of noise/interference (high-frequency hissing, etc.) Low-Pass Filtering Ideal Filtering Ideal Low-Pass Filtering For cutoff frequency u c , H ( u ) = 1 if u < u c otherwise I What is the corresponding convolution kernel? I What problem does this cause? I What could you do differently? Low-Pass Filtering Ideal Filtering Ideal Filters and Ringing - Frequency Domain Low-Pass Filtering Ideal Filtering Ideal Filters and Ringing - Spatial Domain Low-Pass Filtering Ideal Filtering Ideal Filters and Ringing Low-Pass Filtering Ideal Filtering Ideal Filters and Ringing (cont’d) Low-Pass Filtering...
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This note was uploaded on 03/02/2012 for the course C S 450 taught by Professor Morse,b during the Winter '08 term at BYU.

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filtering2.slides.printing - Low-Pass Filtering Low-Pass...

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