Equivalent to matlab bfilter2?

edit

Hi. I don't know too much about image processing, I was told to use matlab bfilter2() (see the link below), but I prefer using OpenCV, if possible. But I don't know if there's an equivalent of such filter, so not to rewrite the whole shebang (which includes learning matlab). A quick googling gives me no clear results.

https://www.mathworks.com/matlabcentr...

Any hint? Thanks in advance!