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This paper proposes an innovative approach to Hierarchical Edge Aware 3D Point Cloud Learning (HEA-Net) that seeks to address the challenges of noise in point cloud data, and improve object recognition and segmentation by focusing on edge…

Computer Vision and Pattern Recognition · Computer Science 2023-10-26 Lei Li

Learning dense point-wise semantics from unstructured 3D point clouds with fewer labels, although a realistic problem, has been under-explored in literature. While existing weakly supervised methods can effectively learn semantics with only…

Computer Vision and Pattern Recognition · Computer Science 2022-01-11 Yan Liu , Qingyong Hu , Yinjie Lei , Kai Xu , Jonathan Li , Yulan Guo

Measuring and alleviating the discrepancies between the synthetic (source) and real scene (target) data is the core issue for domain adaptive semantic segmentation. Though recent works have introduced depth information in the source domain…

Computer Vision and Pattern Recognition · Computer Science 2022-12-06 Yinghong Liao , Wending Zhou , Xu Yan , Shuguang Cui , Yizhou Yu , Zhen Li

Semantic segmentation has been a long standing challenging task in computer vision. It aims at assigning a label to each image pixel and needs significant number of pixellevel annotated data, which is often unavailable. To address this…

Computer Vision and Pattern Recognition · Computer Science 2017-03-29 Nasim Souly , Concetto Spampinato , Mubarak Shah

Semantic segmentation of 3D point cloud data often comes with high annotation costs. Active learning automates the process of selecting which data to annotate, reducing the total amount of annotation needed to achieve satisfactory…

Computer Vision and Pattern Recognition · Computer Science 2025-12-08 Johannes Meyer , Jasper Hoffmann , Felix Schulz , Dominik Merkle , Daniel Buescher , Alexander Reiterer , Joschka Boedecker , Wolfram Burgard

It is generally accepted that one of the critical parts of current vision algorithms based on deep learning and convolutional neural networks is the annotation of a sufficient number of images to achieve competitive performance. This is…

Computer Vision and Pattern Recognition · Computer Science 2021-03-05 Kai Yao , Alberto Ortiz , Francisco Bonnin-Pascual

Current state-of-the-art point cloud-based perception methods usually rely on large-scale labeled data, which requires expensive manual annotations. A natural option is to explore the unsupervised methodology for 3D perception tasks.…

Computer Vision and Pattern Recognition · Computer Science 2023-10-17 Jingyu Zhang , Huitong Yang , Dai-Jie Wu , Jacky Keung , Xuesong Li , Xinge Zhu , Yuexin Ma

Most existing point cloud instance and semantic segmentation methods rely heavily on strong supervision signals, which require point-level labels for every point in the scene. However, such strong supervision suffers from large annotation…

Computer Vision and Pattern Recognition · Computer Science 2022-07-26 An Tao , Yueqi Duan , Yi Wei , Jiwen Lu , Jie Zhou

This paper investigates an open research task of reconstructing and generating 3D point clouds. Most existing works of 3D generative models directly take the Gaussian prior as input for the decoder to generate 3D point clouds, which fail to…

Computer Vision and Pattern Recognition · Computer Science 2023-03-29 Yunfan Zhang , Hao Wang , Guosheng Lin , Vun Chan Hua Nicholas , Zhiqi Shen , Chunyan Miao

Understanding point clouds is of great importance. Many previous methods focus on detecting salient keypoints to identity structures of point clouds. However, existing methods neglect the semantics of points selected, leading to poor…

Computer Vision and Pattern Recognition · Computer Science 2020-08-12 Ruoxi Shi , Zhengrong Xue , Xinyang Li

3D Gaussian Splatting (3DGS) has demonstrated its advantages in achieving fast and high-quality rendering. As point clouds serve as a widely-used and easily accessible form of 3D representation, bridging the gap between point clouds and…

Computer Vision and Pattern Recognition · Computer Science 2025-09-18 Weiqi Zhang , Junsheng Zhou , Haotian Geng , Wenyuan Zhang , Yu-Shen Liu

EEG-based visual decoding aims to establish a mapping between neural signals and visual semantics. However, it remains constrained by the dual challenges of severe information granularity mismatch and the low signal-to-noise ratio (SNR) of…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Fan Yin , Chuhang Zheng , Peiliang Gong , Donghai Guan , Qi Zhu

Spatial networks are useful for modeling geographic phenomena where spatial interaction plays an important role. To analyze the spatial networks and their internal structures, graph-based methods such as community detection have been widely…

Social and Information Networks · Computer Science 2024-11-26 Yunlei Liang , Jiawei Zhu , Wen Ye , Song Gao

Semantic segmentation on point clouds is critical for 3D scene understanding. However, sparse and irregular point distributions provide limited appearance evidence, making geometry-only features insufficient to distinguish objects with…

Computer Vision and Pattern Recognition · Computer Science 2026-02-10 Hojun Song , Chae-yeong Song , Jeong-hun Hong , Chaewon Moon , Dong-hwi Kim , Gahyeon Kim , Soo Ye Kim , Yiyi Liao , Jaehyup Lee , Sang-hyo Park

This paper introduces a method for image semantic segmentation grounded on a novel fusion scheme, which takes place inside a deep convolutional neural network. The main goal of our proposal is to explore object boundary information to…

Computer Vision and Pattern Recognition · Computer Science 2021-08-09 Jefferson Fontinele , Gabriel Lefundes , Luciano Oliveira

Large, annotated datasets are not widely available in medical image analysis due to the prohibitive time, costs, and challenges associated with labelling large datasets. Unlabelled datasets are easier to obtain, and in many contexts, it…

Computer Vision and Pattern Recognition · Computer Science 2022-08-02 Raghav Mehta , Changjian Shui , Brennan Nichyporuk , Tal Arbel

Due to the wavelength-dependent light attenuation, refraction and scattering, underwater images usually suffer from color distortion and blurred details. However, due to the limited number of paired underwater images with undistorted images…

Image and Video Processing · Electrical Eng. & Systems 2022-11-23 Qi Qi , Kunqian Li , Haiyong Zheng , Xiang Gao , Guojia Hou , Kun Sun

Deep learning stands at the forefront in many computer vision tasks. However, deep neural networks are usually data-hungry and require a huge amount of well-annotated training samples. Collecting sufficient annotated data is very expensive…

Computer Vision and Pattern Recognition · Computer Science 2018-05-22 Yun Liu , Yujun Shi , JiaWang Bian , Le Zhang , Ming-Ming Cheng , Jiashi Feng

Attention mechanisms have significantly boosted the performance of video classification neural networks thanks to the utilization of perspective contexts. However, the current research on video attention generally focuses on adopting a…

Computer Vision and Pattern Recognition · Computer Science 2022-04-21 Yanbin Hao , Shuo Wang , Pei Cao , Xinjian Gao , Tong Xu , Jinmeng Wu , Xiangnan He

Semantic segmentation is a fundamental task in computer vision that involves dense pixel-wise classification for scene understanding. Despite significant progress, achieving high accuracy while maintaining real-time performance remains a…

Computer Vision and Pattern Recognition · Computer Science 2025-07-08 Abhinav Sagar