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Active learning in semi-supervised classification involves introducing additional labels for unlabelled data to improve the accuracy of the underlying classifier. A challenge is to identify which points to label to best improve performance…

Machine Learning · Statistics 2024-11-18 Kevin Miller , Andrea L. Bertozzi

Deep learning approaches achieve state-of-the-art performance for classifying radiology images, but rely on large labelled datasets that require resource-intensive annotation by specialists. Both semi-supervised learning and active learning…

Computer Vision and Pattern Recognition · Computer Science 2022-09-07 Shafa Balaram , Cuong M. Nguyen , Ashraf Kassim , Pavitra Krishnaswamy

Imaging in clinical routine is subject to changing scanner protocols, hardware, or policies in a typically heterogeneous set of acquisition hardware. Accuracy and reliability of deep learning models suffer from those changes as data and…

Machine Learning · Computer Science 2021-06-08 Matthias Perkonigg , Johannes Hofmanninger , Georg Langs

As generative models become increasingly capable of producing high-fidelity visual content, the demand for efficient, interpretable, and editable image representations has grown substantially. Recent advances in 2D Gaussian Splatting (2DGS)…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Hao Wang , Ashish Bastola , Chaoyi Zhou , Wenhui Zhu , Xiwen Chen , Xuanzhao Dong , Siyu Huang , Abolfazl Razi

In this paper, we study the problem of deriving fast and accurate classification algorithms with uncertainty quantification. Gaussian process classification provides a principled approach, but the corresponding computational burden is…

Machine Learning · Computer Science 2018-05-29 Dimitrios Milios , Raffaello Camoriano , Pietro Michiardi , Lorenzo Rosasco , Maurizio Filippone

Highly imbalanced datasets are ubiquitous in medical image classification problems. In such problems, it is often the case that rare classes associated to less prevalent diseases are severely under-represented in labeled databases,…

Computer Vision and Pattern Recognition · Computer Science 2022-09-15 Adrian Galdran , Gustavo Carneiro , Miguel A. González Ballester

Active learning optimizes the exploration of large parameter spaces by strategically selecting which experiments or simulations to conduct, thus reducing resource consumption and potentially accelerating scientific discovery. A key…

Machine Learning · Computer Science 2024-05-20 Maxim Ziatdinov

The cost of drawing object bounding boxes (i.e. labeling) for millions of images is prohibitively high. For instance, labeling pedestrians in a regular urban image could take 35 seconds on average. Active learning aims to reduce the cost of…

Computer Vision and Pattern Recognition · Computer Science 2019-11-22 Hamed H. Aghdam , Abel Gonzalez-Garcia , Joost van de Weijer , Antonio M. López

Active learning is of great interest for many practical applications, especially in industry and the physical sciences, where there is a strong need to minimize the number of costly experiments necessary to train predictive models. However,…

Machine Learning · Computer Science 2021-12-23 Maryam Pardakhti , Nila Mandal , Anson W. K. Ma , Qian Yang

Gathering labeled data to train well-performing machine learning models is one of the critical challenges in many applications. Active learning aims at reducing the labeling costs by an efficient and effective allocation of costly labeling…

Machine Learning · Computer Science 2020-06-03 Daniel Kottke , Marek Herde , Christoph Sandrock , Denis Huseljic , Georg Krempl , Bernhard Sick

Despite the success of deep neural networks in medical image classification, the problem remains challenging as data annotation is time-consuming, and the class distribution is imbalanced due to the relative scarcity of diseases. To address…

Computer Vision and Pattern Recognition · Computer Science 2023-08-01 Zhongzheng Huang , Jiawei Wu , Tao Wang , Zuoyong Li , Anastasia Ioannou

Recently, as an effective way of learning latent representations, contrastive learning has been increasingly popular and successful in various domains. The success of constrastive learning in single-label classifications motivates us to…

Computer Vision and Pattern Recognition · Computer Science 2021-07-27 Son D. Dao , Ethan Zhao , Dinh Phung , Jianfei Cai

We present an implementation of model-based online reinforcement learning (RL) for continuous domains with deterministic transitions that is specifically designed to achieve low sample complexity. To achieve low sample complexity, since the…

Artificial Intelligence · Computer Science 2012-02-01 Tobias Jung , Peter Stone

The biggest challenge in the application of deep learning to the medical domain is the availability of training data. Data augmentation is a typical methodology used in machine learning when confronted with a limited data set. In a…

Image and Video Processing · Electrical Eng. & Systems 2024-03-21 Oleksandr Fedoruk , Konrad Klimaszewski , Aleksander Ogonowski , Rafał Możdżonek

In reality, learning from multi-view multi-label data inevitably confronts three challenges: missing labels, incomplete views, and non-aligned views. Existing methods mainly concern the first two and commonly need multiple assumptions to…

Machine Learning · Computer Science 2024-06-12 Xiang Li , Songcan Chen

Deep learning in medical imaging is often limited by scarce and imbalanced annotated data. We present SSGNet, a unified framework that combines class specific generative modeling with iterative semisupervised pseudo labeling to enhance both…

Computer Vision and Pattern Recognition · Computer Science 2025-10-08 Mosong Ma , Tania Stathaki , Michalis Lazarou

This paper studies the problem of novel category discovery on single- and multi-modal data with labels from different but relevant categories. We present a generic, end-to-end framework to jointly learn a reliable representation and assign…

Computer Vision and Pattern Recognition · Computer Science 2021-10-18 Xuhui Jia , Kai Han , Yukun Zhu , Bradley Green

Automatic image-based disease severity estimation generally uses discrete (i.e., quantized) severity labels. Annotating discrete labels is often difficult due to the images with ambiguous severity. An easier alternative is to use relative…

Computer Vision and Pattern Recognition · Computer Science 2022-08-08 Takeaki Kadota , Hideaki Hayashi , Ryoma Bise , Kiyohito Tanaka , Seiichi Uchida

Risk-based active learning is an approach to developing statistical classifiers for online decision-support. In this approach, data-label querying is guided according to the expected value of perfect information for incipient data points.…

Machine Learning · Computer Science 2022-06-28 Aidan J. Hughes , Lawrence A. Bull , Paul Gardner , Nikolaos Dervilis , Keith Worden

Deep learning techniques have been widely applied to hyperspectral image (HSI) classification and have achieved great success. However, the deep neural network model has a large parameter space and requires a large number of labeled data.…

Computer Vision and Pattern Recognition · Computer Science 2021-06-01 Qiqi Zhu , Weihuan Deng , Zhuo Zheng , Yanfei Zhong , Qingfeng Guan , Weihua Lin , Liangpei Zhang , Deren Li