Problem on reset opacity

[JohannaXie]

It seems to have a problem with the function reset_opacity_nonvisible on this line

MonoGS/gaussian_splatting/scene/gaussian_model.py

Line 373 in 6c9254c

opacities_new[filter] = self.get_opacity[filter]

I think this line should be:

for filter in visibility_filters:
     opacities_new[filter] = self._opacity[filter]

As opacities_new is initialized by inverse_sigmoid(0.4) , but self.get_opacity is sigmoid(self._opacity) in range of (0,1).
Did I misunderstand anything?

By the way, the function reset_opacity_nonvisible runs each 2000 mapping iterations. However, in 3DGS, the opacity only resets in the initial iteration. I am wondering why MonoGS needs to reset the opacity of nonvisible Gaussians. It seems not explained in the paper. Thanks in advance!