In graphics and signal processing, there are many filters to compute data.
We show two signal processing filters Gaussian filter and tent filter at our web tool 3D Model Editor.
The resulting function is
![\[f_(x, y) = \frac{1}{2\pi}(e^{-x^2/2}e^{-y^2/2}) = \frac{1}{2\pi}(e^{-(x^2+y^2)/2}) = \frac{1}{2\pi} e^{-r^2/2}\]](https://www.weiy.city/wp-content/ql-cache/quicklatex.com-ffa8f2945e30ed4ead1aed931508276c_l3.png "Rendered by QuickLaTeX.com")
The 2D Gaussian filter, which is both separable and radially symmetric.
The piecewise bilinear function is
![\[f(x)=\left\{ \begin{aligned} (1 - |x|)(1 - |y|) && |x|<1 , |y|<1\\ 0 && others \end{aligned} \right.\]](https://www.weiy.city/wp-content/ql-cache/quicklatex.com-02aa51e77003e24e871e0ed74ea72224_l3.png "Rendered by QuickLaTeX.com")
We can show the result at the web page by the function signal processing filter.
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