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Spatio-temporal machine learning is critically needed for a variety of societal applications, such as agricultural monitoring, hydrological forecast, and traffic management. These applications greatly rely on regional features that…

Machine Learning · Computer Science 2023-03-09 Zhexiong Liu , Licheng Liu , Yiqun Xie , Zhenong Jin , Xiaowei Jia

Due to its promising results, density map regression has been widely employed for image-based crowd counting. The approach, however, often suffers from severe performance degradation when tested on data from unseen scenarios, the so-called…

Computer Vision and Pattern Recognition · Computer Science 2024-04-08 Zhuoxuan Peng , S. -H. Gary Chan

To ensure the out-of-distribution (OOD) generalization performance, traditional domain generalization (DG) methods resort to training on data from multiple sources with different underlying distributions. And the success of those DG methods…

Machine Learning · Computer Science 2023-05-26 Zheyan Shen , Han Yu , Peng Cui , Jiashuo Liu , Xingxuan Zhang , Linjun Zhou , Furui Liu

Classical field forecast evaluation relies mainly on local scores such as RMSE or MAE. These metrics severely over-penalize small spatial or temporal displacements of coherent structures, a limitation known as the double-penalty issue and…

Atmospheric and Oceanic Physics · Physics 2026-04-20 Cyril Voyant

mmWave radar-based gait recognition is a novel user identification method that captures human gait biometrics from mmWave radar return signals. This technology offers privacy protection and is resilient to weather and lighting conditions.…

Computer Vision and Pattern Recognition · Computer Science 2023-05-09 Ekkasit Pinyoanuntapong , Ayman Ali , Kalvik Jakkala , Pu Wang , Minwoo Lee , Qucheng Peng , Chen Chen , Zhi Sun

Most existing person re-identification (Re-ID) approaches follow a supervised learning framework, in which a large number of labelled matching pairs are required for training. Such a setting severely limits their scalability in real-world…

Computer Vision and Pattern Recognition · Computer Science 2018-07-12 Shan Lin , Haoliang Li , Chang-Tsun Li , Alex Chichung Kot

It is expensive and time-consuming to collect sufficient labeled data to build human activity recognition (HAR) models. Training on existing data often makes the model biased towards the distribution of the training data, thus the model…

Artificial Intelligence · Computer Science 2022-06-15 Wang Lu , Jindong Wang , Yiqiang Chen , Sinno Jialin Pan , Chunyu Hu , Xin Qin

Visual grounding is a long-lasting problem in vision-language understanding due to its diversity and complexity. Current practices concentrate mostly on performing visual grounding in still images or well-trimmed video clips. This work, on…

Computer Vision and Pattern Recognition · Computer Science 2021-03-19 Qianyu Feng , Yunchao Wei , Mingming Cheng , Yi Yang

Self-training based unsupervised domain adaptation (UDA) has shown great potential to address the problem of domain shift, when applying a trained deep learning model in a source domain to unlabeled target domains. However, while the…

Computer Vision and Pattern Recognition · Computer Science 2021-06-24 Xiaofeng Liu , Fangxu Xing , Maureen Stone , Jiachen Zhuo , Reese Timothy , Jerry L. Prince , Georges El Fakhri , Jonghye Woo

Large-scale text-to-image foundation models have achieved remarkable visual realism, yet generating human images with correct anatomical structures remains challenging. Existing approaches enforce anatomical constraints through…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Bao Li , Yuliang Xiu , Zhen Liu

The annotation scarcity of medical image segmentation poses challenges in collecting sufficient training data for deep learning models. Specifically, models trained on limited data may not generalize well to other unseen data domains,…

Image and Video Processing · Electrical Eng. & Systems 2023-07-19 Heng Li , Haojin Li , Wei Zhao , Huazhu Fu , Xiuyun Su , Yan Hu , Jiang Liu

Unlike images and natural language tokens, time series data is highly semantically sparse, resulting in labor-intensive label annotations. Unsupervised and Semi-supervised Domain Adaptation (UDA and SSDA) have demonstrated efficiency in…

Machine Learning · Computer Science 2024-10-10 Gang Tu , Dan Li , Bingxin Lin , Zibin Zheng , See-Kiong Ng

Generalizable manipulation involving cross-type object interactions is a critical yet challenging capability in robotics. To reliably accomplish such tasks, robots must address two fundamental challenges: "where to manipulate" (contact…

Robotics · Computer Science 2026-05-13 Zhenhao Shen , Zeming Yang , Yue Chen , Yuran Wang , Shengqiang Xu , Mingleyang Li , Hao Dong , Ruihai Wu

Personalized federated learning algorithms have shown promising results in adapting models to various distribution shifts. However, most of these methods require labeled data on testing clients for personalization, which is usually…

Machine Learning · Computer Science 2023-10-31 Wenxuan Bao , Tianxin Wei , Haohan Wang , Jingrui He

The ability to perceive 3D human bodies from a single image has a multitude of applications ranging from entertainment and robotics to neuroscience and healthcare. A fundamental challenge in human mesh recovery is in collecting the ground…

Computer Vision and Pattern Recognition · Computer Science 2022-09-15 Zhenzhen Weng , Kuan-Chieh Wang , Angjoo Kanazawa , Serena Yeung

Remote sensing image restoration (RSIR) is essential for recovering high-fidelity imagery from degraded observations, enabling accurate downstream analysis. However, most existing methods focus on single degradation types within homogeneous…

Image and Video Processing · Electrical Eng. & Systems 2026-04-06 Wenli Huang , Yang Wu , Xiaomeng Xin , Zhihong Liu , Jinjun Wang , Ye Deng

Domain adaptation (DA) or domain generalization (DG) for face presentation attack detection (PAD) has attracted attention recently with its robustness against unseen attack scenarios. Existing DA/DG-based PAD methods, however, have not yet…

Computer Vision and Pattern Recognition · Computer Science 2022-06-22 Young-Eun Kim , Woo-Jeoung Nam , Kyungseo Min , Seong-Whan Lee

In this work we address multi-target domain adaptation (MTDA) in semantic segmentation, which consists in adapting a single model from an annotated source dataset to multiple unannotated target datasets that differ in their underlying data…

Computer Vision and Pattern Recognition · Computer Science 2022-10-05 Yangsong Zhang , Subhankar Roy , Hongtao Lu , Elisa Ricci , Stéphane Lathuilière

Remote photoplethysmography (rPPG) is an important technique for perceiving human vital signs, which has received extensive attention. For a long time, researchers have focused on supervised methods that rely on large amounts of labeled…

Computer Vision and Pattern Recognition · Computer Science 2023-06-06 Xin Liu , Yuting Zhang , Zitong Yu , Hao Lu , Huanjing Yue , Jingyu Yang

Purpose: We propose a formal framework for the modeling and segmentation of minimally-invasive surgical tasks using a unified set of motion primitives (MPs) to enable more objective labeling and the aggregation of different datasets.…

Robotics · Computer Science 2023-05-16 Kay Hutchinson , Ian Reyes , Zongyu Li , Homa Alemzadeh