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

  • $\begingroup$ 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, 2020 at 5:04
  • $\begingroup$ Wasn't this answered here? computergraphics.stackexchange.com/a/258/209 $\endgroup$
    – Simon F
    Feb 20, 2020 at 11:10


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