Before revision:  We show both qualitatively and quantitatively the  advantages of PU-GCN against the state-of-the-art in terms of fine-grained upsampling quality and point cloud uniformity .
After revision:  We show both qualitatively and quantitatively the significant advantages of PU-GCN against the state-of-the-art in terms of fine-grained upsampling quality and point cloud uniformity .