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What is the size of the final filter after implement convolution of multiple gaussian filters with different sizes?

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  • $\begingroup$ An easy way to find put the exact answer is to tale the Fourier transform which will turn the convolution into a multiplication. Furthermore you can find the expression for the Gaussian Fourier transform. Then perform the multiplication and backtransform. $\endgroup$ – lightxbulb Feb 20 '20 at 5:04
  • $\begingroup$ Wasn't this answered here? computergraphics.stackexchange.com/a/258/209 $\endgroup$ – Simon F Feb 20 '20 at 11:10

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