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In this paper, we introduce a neural network-based method to address the high-dimensional dynamic unbalanced optimal transport (UOT) problem. Dynamic UOT focuses on the optimal transportation between two densities with unequal total mass,…

Optimization and Control · Mathematics 2024-09-23 Wei Wan , Jiangong Pan , Yuejin Zhang , Chenglong Bao , Zuoqiang Shi

Recently, unsupervised image-to-image translation methods based on contrastive learning have achieved state-of-the-art results in many tasks. However, in the previous works, the negatives are sampled from the input image itself, which…

Computer Vision and Pattern Recognition · Computer Science 2023-07-06 Chen Zhao , Wei-Ling Cai , Zheng Yuan , Cheng-Wei Hu

Face recognition models trained under the assumption of identical training and test distributions often suffer from poor generalization when faced with unknown variations, such as a novel ethnicity or unpredictable individual make-ups…

Computer Vision and Pattern Recognition · Computer Science 2021-03-16 Masoud Faraki , Xiang Yu , Yi-Hsuan Tsai , Yumin Suh , Manmohan Chandraker

Cross-modal retrieval aims to measure the content similarity between different types of data. The idea has been previously applied to visual, text, and speech data. In this paper, we present a novel cross-modal retrieval method specifically…

Computer Vision and Pattern Recognition · Computer Science 2020-05-05 Numan Khurshid , Talha Hanif , Mohbat Tharani , Murtaza Taj

In computer vision and machine learning for geographic data, out-of-domain generalization is a pervasive challenge, arising from uneven global data coverage and distribution shifts across geographic regions. Though models are frequently…

Machine Learning · Computer Science 2026-04-20 Haoran Zhang , Livia Betti , Konstantin Klemmer , Esther Rolf , David Alvarez-Melis

The goal of Universal Cross-Domain Retrieval (UCDR) is to achieve robust performance in generalized test scenarios, wherein data may belong to strictly unknown domains and categories during training. Recently, pre-trained models with prompt…

Computer Vision and Pattern Recognition · Computer Science 2024-03-01 Kaipeng Fang , Jingkuan Song , Lianli Gao , Pengpeng Zeng , Zhi-Qi Cheng , Xiyao Li , Heng Tao Shen

In online incremental learning, data continuously arrives with substantial distributional shifts, creating a significant challenge because previous samples have limited replay value when learning a new task. Prior research has typically…

Machine Learning · Computer Science 2026-04-17 Quyen Tran , Hai Nguyen , Hoang Phan , Quan Dao , Linh Ngo , Khoat Than , Dinh Phung , Dimitris Metaxas , Trung Le

Composed Image Retrieval (CIR) retrieves target images using a multi-modal query that combines a reference image with text describing desired modifications. The primary challenge is effectively fusing this visual and textual information.…

Computer Vision and Pattern Recognition · Computer Science 2025-04-16 Chaoyang Wang , Zeyu Zhang , Long Teng , Zijun Li , Shichao Kan

Histopathology is critical for the diagnosis of many diseases, including cancer. These protocols typically require pathologists to manually evaluate slides under a microscope, which is time-consuming and subjective, leading to interest in…

Computer Vision and Pattern Recognition · Computer Science 2023-03-07 Kianoush Falahkheirkhah , Alex Lu , David Alvarez-Melis , Grace Huynh

Learning conditional distributions $\pi^*(\cdot|x)$ is a central problem in machine learning, which is typically approached via supervised methods with paired data $(x,y) \sim \pi^*$. However, acquiring paired data samples is often…

Underwater object detection (UOD) plays a significant role in aquaculture and marine environmental protection. Considering the challenges posed by low contrast and low-light conditions in underwater environments, several underwater image…

Computer Vision and Pattern Recognition · Computer Science 2024-01-09 Linhui Dai , Hong Liu , Pinhao Song , Mengyuan Liu

Unsupervised anomaly detection aims to detect defective parts of a sample by having access, during training, to a set of normal, i.e. defect-free, data. It has many applications in fields, such as industrial inspection or medical imaging,…

Image and Video Processing · Electrical Eng. & Systems 2025-09-03 Robin Trombetta , Carole Lartizien

Salient object detection (SOD) aims to segment visually prominent regions in images and serves as a foundational task for various computer vision applications. We posit that SOD can now reach near-supervised accuracy without a single…

Computer Vision and Pattern Recognition · Computer Science 2025-10-21 Muhammad Umer Ramzan , Ali Zia , Abdelwahed Khamis , Noman Ali , Usman Ali , Wei Xiang

Using search engines for web image retrieval is a tempting alternative to manual curation when creating an image dataset, but their main drawback remains the proportion of incorrect (noisy) samples retrieved. These noisy samples have been…

Computer Vision and Pattern Recognition · Computer Science 2022-07-19 Paul Albert , Eric Arazo , Noel E. O'Connor , Kevin McGuinness

The Composed Image Retrieval (CIR) task aims to retrieve target images using a composed query consisting of a reference image and a modified text. Advanced methods often utilize contrastive learning as the optimization objective, which…

Computer Vision and Pattern Recognition · Computer Science 2024-08-08 Zhangchi Feng , Richong Zhang , Zhijie Nie

Unsupervised Domain Adaptation (UDA) essentially trades a model's performance on a source domain for improving its performance on a target domain. To overcome this, Unsupervised Domain Expansion (UDE) has been introduced, which adapts the…

Computer Vision and Pattern Recognition · Computer Science 2025-12-29 Hailan Lin , Qijie Wei , Kaibin Tian , Ruixiang Zhao , Xirong Li

Image captioning models often suffer from performance degradation when applied to novel datasets, as they are typically trained on domain-specific data. To enhance generalization in out-of-domain scenarios, retrieval-augmented approaches…

Computer Vision and Pattern Recognition · Computer Science 2024-12-03 Hao Wu , Zhihang Zhong , Xiao Sun

Unsupervised image-to-image translation aims at learning a joint distribution of images in different domains by using images from the marginal distributions in individual domains. Since there exists an infinite set of joint distributions…

Computer Vision and Pattern Recognition · Computer Science 2018-07-24 Ming-Yu Liu , Thomas Breuel , Jan Kautz

Unbalanced optimal transport (UOT) provides a flexible way to match or compare nonnegative finite Radon measures. However, UOT requires a predefined ground transport cost, which may misrepresent the data's underlying geometry. Choosing such…

Machine Learning · Statistics 2026-01-09 Emanuele Pardini , Katerina Papagiannouli

Cross-Domain Image Retrieval (CDIR) is a challenging task in computer vision, aiming to match images across different visual domains such as sketches, paintings, and photographs. Existing CDIR methods rely either on supervised learning with…

Computer Vision and Pattern Recognition · Computer Science 2026-04-09 Lucas Iijima , Nikolaos Giakoumoglou , Tania Stathaki