Box Filter
[Separable filter](https://texonom.com/separable-filter-70c9a94159c64cbe85080f9ddf586c47) [Blurring](https://texonom.com/blurring-f58ae9e3896b46339396aacba739bbfc) 


create some un-existed line  ([Aliasing](https://texonom.com/aliasing-b608dae4804f4aba83774acc7733a453) )











