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Most of the existing self-supervised feature learning methods for 3D data either learn 3D features from point cloud data or from multi-view images. By exploring the inherent multi-modality attributes of 3D objects, in this paper, we propose…

Computer Vision and Pattern Recognition · Computer Science 2020-05-29 Longlong Jing , Yucheng Chen , Ling Zhang , Mingyi He , Yingli Tian

Unsupervised point cloud completion aims at estimating the corresponding complete point cloud of a partial point cloud in an unpaired manner. It is a crucial but challenging problem since there is no paired partial-complete supervision that…

Computer Vision and Pattern Recognition · Computer Science 2022-03-30 Yingjie Cai , Kwan-Yee Lin , Chao Zhang , Qiang Wang , Xiaogang Wang , Hongsheng Li

Deep-learning methods have recently started being employed for addressing surface-defect detection problems in industrial quality control. However, with a large amount of data needed for learning, often requiring high-precision labels, many…

Computer Vision and Pattern Recognition · Computer Science 2021-04-21 Jakob Božič , Domen Tabernik , Danijel Skočaj

Constrained image splicing detection and localization (CISDL) is a fundamental task of multimedia forensics, which detects splicing operation between two suspected images and localizes the spliced region on both images. Recent works regard…

Computer Vision and Pattern Recognition · Computer Science 2023-08-22 Yuxuan Tan , Yuanman Li , Limin Zeng , Jiaxiong Ye , Wei wang , Xia Li

In this paper, we focus on the two tasks of 3D shape abstraction and semantic analysis. This is in contrast to current methods, which focus solely on either 3D shape abstraction or semantic analysis. In addition, previous methods have had…

Computer Vision and Pattern Recognition · Computer Science 2022-01-14 Haiyue Fang , Xiaogang Wang , Zheyuan Cai , Yahao Shi , Xun Sun , Shilin Wu , Bin Zhou

Unsupervised learning of global features for 3D shape analysis is an important research challenge because it avoids manual effort for supervised information collection. In this paper, we propose a view-based deep learning model called…

Computer Vision and Pattern Recognition · Computer Science 2021-08-10 Zhizhong Han , Xiyang Wang , Yu-Shen Liu , Matthias Zwicker

Labeled data used for training activity recognition classifiers are usually limited in terms of size and diversity. Thus, the learned model may not generalize well when used in real-world use cases. Semi-supervised learning augments labeled…

Machine Learning · Computer Science 2018-01-25 Ming Zeng , Tong Yu , Xiao Wang , Le T. Nguyen , Ole J. Mengshoel , Ian Lane

Recent advances in semi-supervised learning methods rely on estimating the categories of unlabeled data using a model trained on the labeled data (pseudo-labeling) and using the unlabeled data for various consistency-based regularization.…

Machine Learning · Computer Science 2019-06-14 Chia-Wen Kuo , Chih-Yao Ma , Jia-Bin Huang , Zsolt Kira

Many existing approaches for 3D point cloud semantic segmentation are fully supervised. These fully supervised approaches heavily rely on large amounts of labeled training data that are difficult to obtain and cannot segment new classes…

Computer Vision and Pattern Recognition · Computer Science 2021-03-30 Na Zhao , Tat-Seng Chua , Gim Hee Lee

Federated learning enables multiple clients, such as mobile phones and organizations, to collaboratively learn a shared model for prediction while protecting local data privacy. However, most recent research and applications of federated…

Machine Learning · Computer Science 2021-08-24 Haowen Lin , Jian Lou , Li Xiong , Cyrus Shahabi

Recently, deep learning has experienced rapid expansion, contributing significantly to the progress of supervised learning methodologies. However, acquiring labeled data in real-world settings can be costly, labor-intensive, and sometimes…

Computer Vision and Pattern Recognition · Computer Science 2024-12-02 Jicheng Yuan , Anh Le-Tuan , Ali Ganbarov , Manfred Hauswirth , Danh Le-Phuoc

To address semi-supervised learning from both labeled and unlabeled data, we present a novel meta-learning scheme. We particularly consider that labeled and unlabeled data share disjoint ground truth label sets, which can be seen tasks like…

Computer Vision and Pattern Recognition · Computer Science 2020-08-26 Yun-Chun Chen , Chao-Te Chou , Yu-Chiang Frank Wang

Fine-grained 3D shape classification is important for shape understanding and analysis, which poses a challenging research problem. However, the studies on the fine-grained 3D shape classification have rarely been explored, due to the lack…

Computer Vision and Pattern Recognition · Computer Science 2021-02-03 Xinhai Liu , Zhizhong Han , Yu-Shen Liu , Matthias Zwicker

Face sketch synthesis has made great progress in the past few years. Recent methods based on deep neural networks are able to generate high quality sketches from face photos. However, due to the lack of training data (photo-sketch pairs),…

Computer Vision and Pattern Recognition · Computer Science 2019-05-07 Chaofeng Chen , Wei Liu , Xiao Tan , Kwan-Yee K. Wong

A significant issue in training deep neural networks to solve supervised learning tasks is the need for large numbers of labelled datapoints. The goal of semi-supervised learning is to leverage ubiquitous unlabelled data, together with…

Computer Vision and Pattern Recognition · Computer Science 2019-05-29 Chengxu Zhuang , Xuehao Ding , Divyanshu Murli , Daniel Yamins

Although semi-dense Simultaneous Localization and Mapping (SLAM) has been becoming more popular over the last few years, there is a lack of efficient methods for representing and processing their large scale point clouds. In this paper, we…

Computer Vision and Pattern Recognition · Computer Science 2018-04-30 Shida He , Xuebin Qin , Zichen Zhang , Martin Jagersand

Existing state-of-the-art 3D point cloud understanding methods merely perform well in a fully supervised manner. To the best of our knowledge, there exists no unified framework that simultaneously solves the downstream high-level…

Computer Vision and Pattern Recognition · Computer Science 2023-12-05 Kangcheng Liu

Contrastive Learning (CL) is a recent representation learning approach, which encourages inter-class separability and intra-class compactness in learned image representations. Since medical images often contain multiple semantic classes in…

Computer Vision and Pattern Recognition · Computer Science 2021-08-09 Prashant Pandey , Ajey Pai , Nisarg Bhatt , Prasenjit Das , Govind Makharia , Prathosh AP , Mausam

Representing complex 3D objects as simple geometric primitives, known as shape abstraction, is important for geometric modeling, structural analysis, and shape synthesis. In this paper, we propose an unsupervised shape abstraction method to…

Computer Vision and Pattern Recognition · Computer Science 2021-06-08 Kaizhi Yang , Xuejin Chen

Pathology image segmentation across multiple centers encounters significant challenges due to diverse sources of heterogeneity including imaging modalities, organs, and scanning equipment, whose variability brings representation bias and…

Computer Vision and Pattern Recognition · Computer Science 2025-05-29 Yuan Zhang , Feng Chen , Yaolei Qi , Guanyu Yang , Huazhu Fu