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@@ -55,7 +55,7 @@ Furthermore, only one addition and subtraction is required to calculate a single
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Given a fast approximation scheme, it is necessary to construct a box filter analogous to a given Gaussian filter.
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As given in \eqref{eq:gausfx} the solely parameter of the Gaussian kernel is the standard deviation $\sigma$.
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The solely parameter of the Gaussian kernel is the standard deviation $\sigma$.
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In contrast, the moving average filter is parametrized by its width $w$.
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Therefore, in order to approximate the Gaussian filter of a given $\sigma$ a corresponding value of $w$ must be found.
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Given $n$ iterations of moving average filters with identical widths the ideal width $\wideal$, as suggested by Wells~\cite{wells1986efficient}, is
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