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Existing cross-domain keypoint detection methods always require accessing the source data during adaptation, which may violate the data privacy law and pose serious security concerns. Instead, this paper considers a realistic problem…

Computer Vision and Pattern Recognition · Computer Science 2023-02-10 Yuhe Ding , Jian Liang , Bo Jiang , Aihua Zheng , Ran He

Point cloud registration, a fundamental task in 3D vision, has achieved remarkable success with learning-based methods in outdoor environments. Unsupervised outdoor point cloud registration methods have recently emerged to circumvent the…

Computer Vision and Pattern Recognition · Computer Science 2024-12-25 Kezheng Xiong , Haoen Xiang , Qingshan Xu , Chenglu Wen , Siqi Shen , Jonathan Li , Cheng Wang

Building on recent advances in Bayesian statistics and image denoising, we propose Noise2Score3D, a fully unsupervised framework for point cloud denoising. Noise2Score3D learns the score function of the underlying point cloud distribution…

Computer Vision and Pattern Recognition · Computer Science 2025-10-08 Xiangbin Wei , Yuanfeng Wang , Ao XU , Lingyu Zhu , Dongyong Sun , Keren Li , Yang Li , Qi Qin

The performance of state-of-the-art object detectors degrades significantly under adverse weather, causing a safety-critical domain shift problem for autonomous vehicles. Recent efforts address this problem by relying on synthetic data to…

Computer Vision and Pattern Recognition · Computer Science 2026-05-05 Hamed Khatounabadi , Xiaohu Lu , Hayder Radha

We show that denoising of 3D point clouds can be learned unsupervised, directly from noisy 3D point cloud data only. This is achieved by extending recent ideas from learning of unsupervised image denoisers to unstructured 3D point clouds.…

Computer Vision and Pattern Recognition · Computer Science 2019-10-21 Pedro Hermosilla , Tobias Ritschel , Timo Ropinski

Domain adaptive semantic segmentation aims to learn a model with the supervision of source domain data, and produce satisfactory dense predictions on unlabeled target domain. One popular solution to this challenging task is self-training,…

Computer Vision and Pattern Recognition · Computer Science 2022-03-21 Ruihuang Li , Shuai Li , Chenhang He , Yabin Zhang , Xu Jia , Lei Zhang

Accurate brain tumor segmentation from MRI is limited by expensive annotations and data heterogeneity across scanners and sites. We propose a semi-supervised teacher-student framework that combines an uncertainty-aware pseudo-labeling…

Computer Vision and Pattern Recognition · Computer Science 2026-02-10 Jiaming Liu , Cheng Ding , Daoqiang Zhang

Domain adaptation methods for 2D human pose estimation typically require continuous access to the source data during adaptation, which can be challenging due to privacy, memory, or computational constraints. To address this limitation, we…

Computer Vision and Pattern Recognition · Computer Science 2023-08-29 Dripta S. Raychaudhuri , Calvin-Khang Ta , Arindam Dutta , Rohit Lal , Amit K. Roy-Chowdhury

Meta-learning provides a promising way for learning to efficiently learn and achieves great success in many applications. However, most meta-learning literature focuses on dealing with tasks from a same domain, making it brittle to…

Machine Learning · Computer Science 2021-07-26 Pinzhuo Tian , Yao Gao

Deep learning has shown remarkable performance in medical image segmentation. However, despite its promise, deep learning has many challenges in practice due to its inability to effectively transition to unseen domains, caused by the…

Computer Vision and Pattern Recognition · Computer Science 2024-10-08 Dewei Hu , Hao Li , Han Liu , Jiacheng Wang , Xing Yao , Daiwei Lu , Ipek Oguz

Deep learning based object detectors struggle generalizing to a new target domain bearing significant variations in object and background. Most current methods align domains by using image or instance-level adversarial feature alignment.…

Computer Vision and Pattern Recognition · Computer Science 2023-11-10 Muhammad Akhtar Munir , Muhammad Haris Khan , M. Saquib Sarfraz , Mohsen Ali

In semi-supervised domain adaptation, a few labeled samples per class in the target domain guide features of the remaining target samples to aggregate around them. However, the trained model cannot produce a highly discriminative feature…

Computer Vision and Pattern Recognition · Computer Science 2021-04-20 Jichang Li , Guanbin Li , Yemin Shi , Yizhou Yu

In realistic speech enhancement settings for end-user devices, we often encounter only a few speakers and noise types that tend to reoccur in the specific acoustic environment. We propose a novel personalized speech enhancement method to…

Audio and Speech Processing · Electrical Eng. & Systems 2021-05-11 Sunwoo Kim , Minje Kim

Person Re-Identification (re-ID) aims at retrieving images of the same person taken by different cameras. A challenge for re-ID is the performance preservation when a model is used on data of interest (target data) which belong to a…

Computer Vision and Pattern Recognition · Computer Science 2020-09-22 Fabian Dubourvieux , Romaric Audigier , Angelique Loesch , Samia Ainouz , Stephane Canu

Source-free domain adaptation (SFDA) aims to adapt models trained on a labeled source domain to an unlabeled target domain without the access to source data. In medical imaging scenarios, the practical significance of SFDA methods has been…

Computer Vision and Pattern Recognition · Computer Science 2023-10-30 Jiesi Hu , Yanwu Yang , Xutao Guo , Jinghua Wang , Ting Ma

Self-training has shown great potential in semi-supervised learning. Its core idea is to use the model learned on labeled data to generate pseudo-labels for unlabeled samples, and in turn teach itself. To obtain valid supervision, active…

Computer Vision and Pattern Recognition · Computer Science 2022-09-20 Ye Du , Yujun Shen , Haochen Wang , Jingjing Fei , Wei Li , Liwei Wu , Rui Zhao , Zehua Fu , Qingjie Liu

The training of deep learning models generally requires a large amount of annotated data for effective convergence and generalisation. However, obtaining high-quality annotations is a laboursome and expensive process due to the need of…

Computer Vision and Pattern Recognition · Computer Science 2021-11-05 Fengbei Liu , Yu Tian , Filipe R. Cordeiro , Vasileios Belagiannis , Ian Reid , Gustavo Carneiro

With the supervision from source domain only in class-level, existing unsupervised domain adaptation (UDA) methods mainly learn the domain-invariant representations from a shared feature extractor, which causes the source-bias problem. This…

Computer Vision and Pattern Recognition · Computer Science 2020-10-21 Ruixin Xiao , Zhilei Liu , Baoyuan Wu

Purpose: Automating tasks such as lung tumor localization and segmentation in radiological images can free valuable time for radiologists and other clinical personnel. Convolutional neural networks may be suited for such tasks, but require…

Image and Video Processing · Electrical Eng. & Systems 2021-12-23 Vemund Fredriksen , Svein Ole M. Svele , André Pedersen , Thomas Langø , Gabriel Kiss , Frank Lindseth

We propose a new framework that formulates point cloud registration as a denoising diffusion process from noisy transformation to object transformation. During training stage, object transformation diffuses from ground-truth transformation…

Computer Vision and Pattern Recognition · Computer Science 2023-12-12 Yue Wu , Yongzhe Yuan , Xiaolong Fan , Xiaoshui Huang , Maoguo Gong , Qiguang Miao