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[[Image:unsharpmaskfrequencyresponse.png]] | [[Image:unsharpmaskfrequencyresponse.png]] | ||
| − | [http://en.wikipedia.org/wiki/Unsharp_masking | + | == Links == |
| + | *[http://en.wikipedia.org/wiki/Unsharp_masking Example of unsharp masking applied to eye image] | ||
| + | *[http://www.focusmagic.com/exampleunsharpmask.htm Illustrations of grainy effects caused by unsharp mark] | ||
Latest revision as of 11:52, 28 April 2009
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] $
