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Active learning (AL) aims to build high-quality labeled datasets by iteratively selecting the most informative samples from an unlabeled pool under limited annotation budgets. However, in fine-grained image classification, assessing this…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Yinghao Jin , Xi Yang

Deep metric learning applied to various applications has shown promising results in identification, retrieval and recognition. Existing methods often do not consider different granularity in visual similarity. However, in many domain…

Computer Vision and Pattern Recognition · Computer Science 2021-05-17 Dipu Manandhar , Muhammet Bastan , Kim-Hui Yap

In recent years, the emergence of deep convolutional neural networks has positioned face recognition as a prominent research focus in computer vision. Traditional loss functions, such as margin-based, hard-sample mining-based, and hybrid…

Computer Vision and Pattern Recognition · Computer Science 2025-03-06 Qiqi Guo , Zhuowen Zheng , Guanghua Yang , Zhiquan Liu , Xiaofan Li , Jianqing Li , Jinyu Tian , Xueyuan Gong

MultiGrain is a network architecture producing compact vector representations that are suited both for image classification and particular object retrieval. It builds on a standard classification trunk. The top of the network produces an…

Computer Vision and Pattern Recognition · Computer Science 2019-04-04 Maxim Berman , Hervé Jégou , Andrea Vedaldi , Iasonas Kokkinos , Matthijs Douze

Visual document retrieval aims to retrieve a set of document pages relevant to a query from visually rich collections. Existing methods often employ Vision-Language Models (VLMs) to encode queries and visual pages into a shared embedding…

Information Retrieval · Computer Science 2026-04-10 Hao Yang , Yifan Ji , Zhipeng Xu , Zhenghao Liu , Yukun Yan , Zulong Chen , Shuo Wang , Yu Gu , Ge Yu

Unsupervised fine-grained class clustering is a practical yet challenging task due to the difficulty of feature representations learning of subtle object details. We introduce C3-GAN, a method that leverages the categorical inference power…

Computer Vision and Pattern Recognition · Computer Science 2022-03-15 Yunji Kim , Jung-Woo Ha

The emerging task of fine-grained image classification in low-data regimes assumes the presence of low inter-class variance and large intra-class variation along with a highly limited amount of training samples per class. However,…

Computer Vision and Pattern Recognition · Computer Science 2024-07-01 Dmitry Demidov , Abduragim Shtanchaev , Mihail Mihaylov , Mohammad Almansoori

Many leading self-supervised methods for unsupervised representation learning, in particular those for embedding image features, are built on variants of the instance discrimination task, whose optimization is known to be prone to…

Computer Vision and Pattern Recognition · Computer Science 2024-08-06 Daniel Shalam , Simon Korman

Image harmonization is a crucial technique in image composition that aims to seamlessly match the background by adjusting the foreground of composite images. Current methods adopt either global-level or pixel-level feature matching.…

Computer Vision and Pattern Recognition · Computer Science 2023-12-21 Haoxing Chen , Yaohui Li , Zhangxuan Gu , Zhuoer Xu , Jun Lan , Huaxiong Li

Detecting anomalies such as an incorrect combination of objects or deviations in their positions is a challenging problem in unsupervised anomaly detection (AD). Since conventional AD methods mainly focus on local patterns of normal images,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-16 Shunsuke Sakai , Tatushito Hasegawa , Makoto Koshino

Lines are interesting geometrical features commonly seen in indoor and urban environments. There is missing a complete benchmark where one can evaluate lines from a sequential stream of images in all its stages: Line detection, Line…

Computer Vision and Pattern Recognition · Computer Science 2023-08-01 Kirill Ivanov , Gonzalo Ferrer , Anastasiia Kornilova

Learning fine-grained image similarity is a challenging task. It needs to capture between-class and within-class image differences. This paper proposes a deep ranking model that employs deep learning techniques to learn similarity metric…

Computer Vision and Pattern Recognition · Computer Science 2014-04-21 Jiang Wang , Yang song , Thomas Leung , Chuck Rosenberg , Jinbin Wang , James Philbin , Bo Chen , Ying Wu

This paper proposes a self-supervised approach to learn universal facial representations from videos, that can transfer across a variety of facial analysis tasks such as Facial Attribute Recognition (FAR), Facial Expression Recognition…

Computer Vision and Pattern Recognition · Computer Science 2023-03-23 Zhixi Cai , Shreya Ghosh , Kalin Stefanov , Abhinav Dhall , Jianfei Cai , Hamid Rezatofighi , Reza Haffari , Munawar Hayat

Depth estimation is an essential component in understanding the 3D geometry of a scene, with numerous applications in urban and indoor settings. These scenes are characterized by a prevalence of human made structures, which in most of the…

Computer Vision and Pattern Recognition · Computer Science 2020-09-03 Mattia Rossi , Mireille El Gheche , Andreas Kuhn , Pascal Frossard

Self-supervised learning (SSL) has recently achieved promising performance for 3D medical image analysis tasks. Most current methods follow existing SSL paradigm originally designed for photographic or natural images, which cannot…

Computer Vision and Pattern Recognition · Computer Science 2023-08-21 Yankai Jiang , Mingze Sun , Heng Guo , Xiaoyu Bai , Ke Yan , Le Lu , Minfeng Xu

Fine-grained hashing has become a powerful solution for rapid and efficient image retrieval, particularly in scenarios requiring high discrimination between visually similar categories. To enable each hash bit to correspond to specific…

Computer Vision and Pattern Recognition · Computer Science 2025-09-23 Peng Wang , Yong Li , Lin Zhao , Xiu-Shen Wei

Fine-grained image-text alignment is a pivotal challenge in multimodal learning, underpinning key applications such as visual question answering, image captioning, and vision-language navigation. Unlike global alignment, fine-grained…

Computer Vision and Pattern Recognition · Computer Science 2025-12-02 Jiale Liu , Haoming Zhou , Yishu Liu , Bingzhi Chen , Yuncheng Jiang

Retrieval Augmented Generation (RAG) has emerged as an effective solution for mitigating hallucinations in Large Language Models (LLMs). The retrieval stage in RAG typically involves a pre-trained embedding model, which converts queries and…

Machine Learning · Computer Science 2024-03-13 Mingtian Zhang , Shawn Lan , Peter Hayes , David Barber

Embeddings are one of the fundamental building blocks for data analysis tasks. Embeddings are already essential tools for large language models and image analysis, and their use is being extended to many other research domains. The…

Recent advances in generative models and adversarial training have enabled artificially generating artworks in various artistic styles. It is highly desirable to gain more control over the generated style in practice. However, artistic…

Computer Vision and Pattern Recognition · Computer Science 2021-10-26 Xin Miao , Huayan Wang , Jun Fu , Jiayi Liu , Shen Wang , Zhenyu Liao