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Unbalanced tabular data sets present significant challenges for predictive modeling and data analysis across a wide range of applications. In many real-world scenarios, such as fraud detection, medical diagnosis, and rare event prediction,…

Machine Learning · Computer Science 2025-07-23 Ivona Krchova , Michael Platzer , Paul Tiwald

Recent text-to-image generation models have shown promising results in generating high-fidelity photo-realistic images. Though the results are astonishing to human eyes, how applicable these generated images are for recognition tasks…

Computer Vision and Pattern Recognition · Computer Science 2023-02-16 Ruifei He , Shuyang Sun , Xin Yu , Chuhui Xue , Wenqing Zhang , Philip Torr , Song Bai , Xiaojuan Qi

When developing text classification models for real world applications, one major challenge is the difficulty to collect sufficient data for all text classes. In this work, we address this challenge by utilizing large language models (LLMs)…

Computation and Language · Computer Science 2025-08-15 Chenhao Xue , Yuanzhe Jin , Adrian Carrasco-Revilla , Joyraj Chakraborty , Min Chen

Text-to-image synthesis models require the ability to generate diverse images while maintaining stability. To overcome this challenge, a number of methods have been proposed, including the collection of prompt-image datasets and the…

Computer Vision and Pattern Recognition · Computer Science 2025-11-17 Keunwoo Park , Jihye Chae , Joong Ho Ahn , Jihoon Kweon

Generative Adversarial Networks (GANs) have swiftly evolved to imitate increasingly complex image distributions. However, majority of the developments focus on performance of GANs on balanced datasets. We find that the existing GANs and…

Machine Learning · Computer Science 2021-06-18 Harsh Rangwani , Konda Reddy Mopuri , R. Venkatesh Babu

Exemplar-Free Class Incremental Learning is a highly challenging setting where replay memory is unavailable. Methods relying on frozen feature extractors have drawn attention recently in this setting due to their impressive performances and…

Machine Learning · Computer Science 2025-02-28 Quentin Jodelet , Xin Liu , Yin Jun Phua , Tsuyoshi Murata

We propose a new strategy to improve the accuracy and robustness of image classification. First, we train a baseline CNN model. Then, we identify challenging regions in the feature space by identifying all misclassified samples, and…

Computer Vision and Pattern Recognition · Computer Science 2023-02-23 Fadoua Khmaissia , Hichem Frigui

Standard deep learning-based classification approaches require collecting all samples from all classes in advance and are trained offline. This paradigm may not be practical in real-world clinical applications, where new classes are…

Computer Vision and Pattern Recognition · Computer Science 2022-07-05 Sana Ayromlou , Purang Abolmaesumi , Teresa Tsang , Xiaoxiao Li

Class imbalance in a dataset is one of the major challenges that can significantly impact the performance of machine learning models resulting in biased predictions. Numerous techniques have been proposed to address class imbalanced…

Machine Learning · Computer Science 2022-10-25 Md Manjurul Ahsan , Md Shahin Ali , Zahed Siddique

Large Language Models (LLMs) like GPT-4o can help automate text classification tasks at low cost and scale. However, there are major concerns about the validity and reliability of LLM outputs. By contrast, human coding is generally more…

Computation and Language · Computer Science 2025-01-17 Conrad Borchers , Danielle R. Thomas , Jionghao Lin , Ralph Abboud , Kenneth R. Koedinger

Reward models (RMs) play a critical role in aligning language models through the process of reinforcement learning from human feedback. RMs are trained to predict a score reflecting human preference, which requires significant time and cost…

Computation and Language · Computer Science 2024-10-21 Zihuiwen Ye , Fraser Greenlee-Scott , Max Bartolo , Phil Blunsom , Jon Ander Campos , Matthias Gallé

Data augmentation is widely used in vision to introduce variation and mitigate overfitting, by enabling models to learn invariant properties. However, augmentation only indirectly captures these properties and does not explicitly constrain…

Computer Vision and Pattern Recognition · Computer Science 2026-03-19 Andy Dimnaku , Abdullah Yusuf Kavranoglu , Yaser Abu-Mostafa

Deep generative models, which target reproducing the given data distribution to produce novel samples, have made unprecedented advancements in recent years. Their technical breakthroughs have enabled unparalleled quality in the synthesis of…

Computer Vision and Pattern Recognition · Computer Science 2024-12-19 Mengping Yang , Zhe Wang

Encoder-decoder Large Language Models (LLMs), such as BERT and RoBERTa, require that all categories in an annotation task be sufficiently represented in the training data for optimal performance. However, it is often difficult to find…

Computation and Language · Computer Science 2025-04-22 Joan C. Timoneda

Class imbalance in supervised classification often degrades model performance by biasing predictions toward the majority class, particularly in critical applications such as medical diagnosis and fraud detection. Traditional oversampling…

Machine Learning · Statistics 2025-09-16 Suman Cha , Hyunjoong Kim

Recent Text-to-Image (T2I) generation models such as Stable Diffusion and Imagen have made significant progress in generating high-resolution images based on text descriptions. However, many generated images still suffer from issues such as…

Data-hunger and data-imbalance are two major pitfalls in many deep learning approaches. For example, on highly optimized production lines, defective samples are hardly acquired while non-defective samples come almost for free. The defects…

Computer Vision and Pattern Recognition · Computer Science 2023-02-17 Ruyu Wang , Sabrina Hoppe , Eduardo Monari , Marco F. Huber

Recent advances in generative artificial intelligence have enabled the creation of high-quality synthetic data that closely mimics real-world data. This paper explores the adaptation of the Stable Diffusion 2.0 model for generating…

Machine Learning · Computer Science 2024-05-07 Eugenio Lomurno , Matteo D'Oria , Matteo Matteucci

In conventional deep learning, the number of neurons typically remains fixed during training. However, insights from biology suggest that the human hippocampus undergoes continuous neuron generation and pruning of neurons over the course of…

Machine Learning · Computer Science 2025-07-15 Taigo Sakai , Kazuhiro Hotta

The long-standing challenge of building effective classification models for small and imbalanced datasets has seen little improvement since the creation of the Synthetic Minority Over-sampling Technique (SMOTE) over 20 years ago. Though GAN…

Machine Learning · Computer Science 2022-11-21 Leon O. Guertler , Andri Ashfahani , Anh Tuan Luu