The box filter can have issues with aliasing that the gaussian filter may not. This is because with the box filter, a pixel will be used or not used in the averaging to calculate the new pixel. Whereas in gaussian filtering, there is a slow increase/decrease in weighting. This makes sharp changes in the spatial domain more blurred.
The box filter can have issues with aliasing that the gaussian filter may not. This is because with the box filter, a pixel will be used or not used in the averaging to calculate the new pixel. Whereas in gaussian filtering, there is a slow increase/decrease in weighting. This makes sharp changes in the spatial domain more blurred.