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Many real-world classification problems often have classes with very few labeled training samples. Moreover, all possible classes may not be initially available for training, and may be given incrementally. Deep learning models need to deal…

Computer Vision and Pattern Recognition · Computer Science 2021-03-02 Pratik Mazumder , Pravendra Singh , Piyush Rai

We study many-class few-shot (MCFS) problem in both supervised learning and meta-learning settings. Compared to the well-studied many-class many-shot and few-class few-shot problems, the MCFS problem commonly occurs in practical…

Machine Learning · Computer Science 2020-11-10 Lu Liu , Tianyi Zhou , Guodong Long , Jing Jiang , Chengqi Zhang

Fine-grained image retrieval (FGIR) is to learn visual representations that distinguish visually similar objects while maintaining generalization. Existing methods propose to generate discriminative features, but rarely consider the…

Computer Vision and Pattern Recognition · Computer Science 2024-04-25 Xin Jiang , Hao Tang , Rui Yan , Jinhui Tang , Zechao Li

Fine-grained image classification involves identifying different subcategories of a class which possess very subtle discriminatory features. Fine-grained datasets usually provide bounding box annotations along with class labels to aid the…

Computer Vision and Pattern Recognition · Computer Science 2021-07-30 Farha Al Breiki , Muhammad Ridzuan , Rushali Grandhe

Few-shot learning (FSL) based on manifold regularization aims to improve the recognition capacity of novel objects with limited training samples by mixing two samples from different categories with a blending factor. However, this mixing…

Computer Vision and Pattern Recognition · Computer Science 2024-03-27 Xingyu Zhu , Shuo Wang , Jinda Lu , Yanbin Hao , Haifeng Liu , Xiangnan He

Deep convolutional neural networks have achieved remarkable success in face recognition (FR), partly due to the abundant data availability. However, the current training benchmarks exhibit an imbalanced quality distribution; most images are…

Computer Vision and Pattern Recognition · Computer Science 2023-08-21 Sahar Rahimi Malakshan , Mohammad Saeed Ebrahimi Saadabadi , Nima Najafzadeh , Nasser M. Nasrabadi

Advancements in open-source pre-trained backbones make it relatively easy to fine-tune a model for new tasks. However, this lowered entry barrier poses potential risks, e.g., bad actors developing models for harmful applications. A question…

Computer Vision and Pattern Recognition · Computer Science 2024-10-01 Amber Yijia Zheng , Chiao-An Yang , Raymond A. Yeh

Recent studies show that pretraining a deep neural network with fine-grained labeled data, followed by fine-tuning on coarse-labeled data for downstream tasks, often yields better generalization than pretraining with coarse-labeled data.…

Machine Learning · Computer Science 2024-12-11 Guan Zhe Hong , Yin Cui , Ariel Fuxman , Stanley Chan , Enming Luo

Due to the limited availability of data, existing few-shot learning methods trained from scratch fail to achieve satisfactory performance. In contrast, large-scale pre-trained models such as CLIP demonstrate remarkable few-shot and…

Computer Vision and Pattern Recognition · Computer Science 2023-11-20 Kun Song , Huimin Ma , Bochao Zou , Huishuai Zhang , Weiran Huang

Recognition of objects with subtle differences has been used in many practical applications, such as car model recognition and maritime vessel identification. For discrimination of the objects in fine-grained detail, we focus on deep…

Computer Vision and Pattern Recognition · Computer Science 2019-07-23 Kaan Karaman , Erhan Gundogdu , Aykut Koc , A. Aydin Alatan

Few-Shot transfer learning has become a major focus of research as it allows recognition of new classes with limited labeled data. While it is assumed that train and test data have the same data distribution, this is often not the case in…

Computer Vision and Pattern Recognition · Computer Science 2023-03-17 Wenjian Wang , Lijuan Duan , Yuxi Wang , Junsong Fan , Zhi Gong , Zhaoxiang Zhang

Deep neural networks may perform poorly when training datasets are heavily class-imbalanced. Recently, two-stage methods decouple representation learning and classifier learning to improve performance. But there is still the vital issue of…

Computer Vision and Pattern Recognition · Computer Science 2021-04-02 Zhisheng Zhong , Jiequan Cui , Shu Liu , Jiaya Jia

Few-shot image classification aims to learn an image classifier using only a small set of labeled examples per class. A recent research direction for improving few-shot classifiers involves augmenting the labelled samples with synthetic…

Computer Vision and Pattern Recognition · Computer Science 2023-12-11 Victor G. Turrisi da Costa , Nicola Dall'Asen , Yiming Wang , Nicu Sebe , Elisa Ricci

While deep learning excels in computer vision tasks with abundant labeled data, its performance diminishes significantly in scenarios with limited labeled samples. To address this, Few-shot learning (FSL) enables models to perform the…

Computer Vision and Pattern Recognition · Computer Science 2025-02-19 Huali Xu , Shuaifeng Zhi , Shuzhou Sun , Vishal M. Patel , Li Liu

Extracting discriminative features plays a crucial role in the fine-grained visual classification task. Most of the existing methods focus on developing attention or augmentation mechanisms to achieve this goal. However, addressing the…

Computer Vision and Pattern Recognition · Computer Science 2022-05-24 Tuong Do , Huy Tran , Erman Tjiputra , Quang D. Tran , Anh Nguyen

Achieving group-robust generalization in the presence of spurious correlations remains a significant challenge, particularly when bias annotations are unavailable. Recent studies on Class-Conditional Distribution Balancing (CCDB) reveal…

Computer Vision and Pattern Recognition · Computer Science 2026-05-05 Miaoyun Zhao , Qiang Zhang

Detecting arbitrarily oriented tiny objects poses intense challenges to existing detectors, especially for label assignment. Despite the exploration of adaptive label assignment in recent oriented object detectors, the extreme geometry…

Computer Vision and Pattern Recognition · Computer Science 2023-04-19 Chang Xu , Jian Ding , Jinwang Wang , Wen Yang , Huai Yu , Lei Yu , Gui-Song Xia

We present a weakly supervised deep learning method to perform instance segmentation of cells present in microscopy images. Annotation of biomedical images in the lab can be scarce, incomplete, and inaccurate. This is of concern when…

Computer Vision and Pattern Recognition · Computer Science 2019-08-28 Fidel A. Guerrero-Peña , Pedro D. Marrero Fernandez , Tsang Ing Ren , Alexandre Cunha

Deep Neural Networks are well known for efficiently fitting training data, yet experiencing poor generalization capabilities whenever some kind of bias dominates over the actual task labels, resulting in models learning "shortcuts". In…

Machine Learning · Computer Science 2024-08-12 Pietro Morerio , Ruggero Ragonesi , Vittorio Murino

In practical domains, high-dimensional data are usually associated with diverse semantic labels, whereas traditional feature selection methods are designed for single-label data. Moreover, existing multi-label methods encounter two main…

Machine Learning · Computer Science 2025-05-26 Yan Zhong , Xingyu Wu , Xinping Zhao , Li Zhang , Xinyuan Song , Lei Shi , Bingbing Jiang