This is pretty standard image processing techniques, which you can streamline yourself. Not sure if there exists out-of-the-box solutions, but you can easily create your own with for example scikit-image (python).

Here are some selected functions.

Opening: http://scikit-image.org/docs/stable/api/skimage.morphology.h...

Closing: http://scikit-image.org/docs/stable/api/skimage.morphology.h...

Dilate: http://scikit-image.org/docs/stable/api/skimage.morphology.h...

I recommend starting at the user guide: http://scikit-image.org/docs/stable/user_guide.html