文献类型：期刊文献

英文题名：Representation learning of point cloud upsampling in global and local inputs

作者：Zhang, Tongxu[1,2];Wang, Bei[1]

机构：[1]East China Univ Sci & Technol, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Hong Kong Polytech Univ, Hung Hom, Kowloon, Hong Kong, Peoples R China

年份：2025

卷号：260

外文期刊名：COMPUTER VISION AND IMAGE UNDERSTANDING

收录：;EI(收录号：20253419033706);WOS:【SCI-EXPANDED(收录号:WOS:001633340700001)】；

基金：This research was supported by the National Natural Science dation of China under Grant 61773164.

语种：英文

外文关键词：Deep learning; Point cloud; Upsampling; Feature extract; Interpretability

摘要：In recent years, point cloud upsampling has been widely applied in tasks such as 3D reconstruction and object recognition. This study proposed a novel framework, ReLPU, which enhances upsampling performance by explicitly learning from both global and local structural features of point clouds. Specifically, we extracted global features from uniformly segmented inputs (Average Segments) and local features from patch-based inputs of the same point cloud. These two types of features were processed through parallel autoencoders, fused, and then fed into a shared decoder for upsampling. This dual-input design improved feature completeness and cross-scale consistency, especially in sparse and noisy regions. Our framework was applied to several state-ofthe-art autoencoder-based networks and validated on standard datasets. Experimental results demonstrated consistent improvements in geometric fidelity and robustness. In addition, saliency maps confirmed that parallel global-local learning significantly enhanced the interpretability and performance of point cloud upsampling.