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[[Category:ECE438 (BoutinFall2009)]] | [[Category:ECE438 (BoutinFall2009)]] | ||
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| − | = | + | =DSFT of some basic filters= |
Used in [[ECE438]] | Used in [[ECE438]] | ||
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Revision as of 09:27, 29 December 2010
DSFT of some basic filters
Used in ECE438
Plot of the frequency response of the average filter:
$ h(k,l)=\frac{1}{16}\left[ \begin{array}{ccc}1& 2 & 1\\ 2 &4 &2 \\ 1 & 2 & 1 \end{array} \right] $
Plot of the frequency response of the filter:
$ h(k,l)=\frac{1}{9}\left[\begin{array}{ccc}-1& -1 & -1\\ -1 &8 &-1 \\ -1 & -1 & -1 \end{array} \right] $ with $ \lambda = 0.5 $.
Plot of the frequency response of the filter:
$ h(k,l)=\frac{1}{9}\left[\begin{array}{ccc}-\lambda & -\lambda & -\lambda\\ -\lambda &9+8 \lambda & -\lambda \\ -\lambda & -\lambda & -\lambda \end{array} \right] $
Links
- Example of unsharp masking applied to eye image
- Illustrations of grainy effects caused by unsharp mark
