Like the description of [`scipy.signal.convolve2d()`](https://docs.scipy.org/doc/scipy/reference/generated/scipy.signal.convolve2d.html), provide the arguments `mode`, `boundary`, `fillvalue`. - [x] mode - [ ] boundary - [ ] fillvalue
Like the description of
scipy.signal.convolve2d(), provide the argumentsmode,boundary,fillvalue.