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13.3.5.4 High-pass Filters
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13.3.5.4 High-pass Filters
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13.3.5.4.1 Basic High-Pass Filter: 3x3
2001-01-10
![\begin{displaymath}
\left[
\begin{array}{r r r}
-1 & -1 & -1 \\
-1 & 9 & -1 \\
-1 & -1 & -1 \\
\end{array}
\right]
\end{displaymath}](img411.gif)