How to implement WASPP?

[yellowYuga]

How to implement WASPP?Is that using ASPP to get multi-scale feature pooling without feature size reduction first ,then using weighted pooling(2d cspn) like WSPP.Or just using dailation conv in 2d cspn's conv?
btw,is max_of_4_tensor used in Stereo or just used in Depth Completion ?

Thanks a lot.