filtering2.slides.printing.6

filtering2.slides.printing.6 - Low-Pass Filtering Low-Pass...

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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 ± Low-pass filtering smooths a signal or image ± Low frequency components = gradual transitions ± High frequency components = rapid transitions (edges, texture, etc.) ± Remember: smoothing helps remove noise ± 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 0 otherwise ± What is the corresponding convolution kernel? ± What problem does this cause? ± 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
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Low-Pass Filtering Ideal Filtering Ideal Filters and Ringing (cont’d) Low-Pass Filtering
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filtering2.slides.printing.6 - Low-Pass Filtering Low-Pass...

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