Data alignment with pointnet/pointnet++

[chengengliu]

Hi, thanks a lot for your work. I'm trying to use pointnet on SemanticKitti and I am wondering how you guys preprocess the SemanticKitti data so that it fits PointNet/PointNet++? Since each point in default PointNet architecture is represented as 9-dim vector and in your data it is 4-dim. How did you convert the 4-dim to 9-dim? Any tips would be appreciated, thanks.