Hi,

I am participating in the Hacktoberfest and would like to contribute to this repo. I was searching for the following implementations and I couldn’t find them:

• 1D and 2D convolution
• Based on the convolution any type of filtering like Sobel and Laplacian derivatives, smoothing, etc.
• Numerical Derivation: calculating a derivative of a differentiable function

Is it fine if I implement all of this, I would say in 2 PRs just to separate them logically? If yes, in what directories the implementations should be? I can guess it myself but it could be better if someone more directed can suggest.