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Learning from class imbalanced datasets poses challenges for many machine learning algorithms. Many real-world domains are, by definition, class imbalanced by virtue of having a majority class that naturally has many more instances than its…

Machine Learning · Computer Science 2021-11-08 Mohammed Temraz , Mark T. Keane

Detecting edges in images suffers from the problems of (P1) heavy imbalance between positive and negative classes as well as (P2) label uncertainty owing to disagreement between different annotators. Existing solutions address P1 using…

Computer Vision and Pattern Recognition · Computer Science 2024-03-08 Bedrettin Cetinkaya , Sinan Kalkan , Emre Akbas

The Federated Learning setting has a central server coordinating the training of a model on a network of devices. One of the challenges is variable training performance when the dataset has a class imbalance. In this paper, we address this…

Machine Learning · Computer Science 2020-11-13 Dipankar Sarkar , Ankur Narang , Sumit Rai

Deep learning models have gained remarkable performance on a variety of image classification tasks. However, many models suffer from limited performance in clinical or medical settings when data are imbalanced. To address this challenge, we…

Image and Video Processing · Electrical Eng. & Systems 2022-04-15 Long Gao , Chang Liu , Dooman Arefan , Ashok Panigrahy , Margarita L. Zuley , Shandong Wu

Humans express their emotions via facial expressions, voice intonation and word choices. To infer the nature of the underlying emotion, recognition models may use a single modality, such as vision, audio, and text, or a combination of…

Machine Learning · Computer Science 2022-02-21 Vandana Rajan , Alessio Brutti , Andrea Cavallaro

Uncertainty estimation is critical for cost-sensitive deep-learning applications (i.e. disease diagnosis). It is very challenging partly due to the inaccessibility of uncertainty groundtruth in most datasets. Previous works proposed to…

Machine Learning · Computer Science 2021-10-18 Bolian Li , Zige Zheng , Changqing Zhang

Computer vision-based methods have valuable use cases in precision medicine, and recognizing facial phenotypes of genetic disorders is one of them. Many genetic disorders are known to affect faces' visual appearance and geometry. Automated…

Computer Vision and Pattern Recognition · Computer Science 2023-05-25 Ömer Sümer , Fabio Hellmann , Alexander Hustinx , Tzung-Chien Hsieh , Elisabeth André , Peter Krawitz

Understanding emotions accurately is essential for fields like human-computer interaction. Due to the complexity of emotions and their multi-modal nature (e.g., emotions are influenced by facial expressions and audio), researchers have…

Computer Vision and Pattern Recognition · Computer Science 2025-01-17 Qize Yang , Detao Bai , Yi-Xing Peng , Xihan Wei

Medical diagnosis might fail due to bias. In this work, we identified class-feature bias, which refers to models' potential reliance on features that are strongly correlated with only a subset of classes, leading to biased performance and…

Machine Learning · Computer Science 2025-09-03 Lishi Zuo , Man-Wai Mak , Lu Yi , Youzhi Tu

Due to the inherent imbalance in real-world datasets, na\"ive Empirical Risk Minimization (ERM) tends to bias the learning process towards the majority classes, hindering generalization to minority classes. To rebalance the learning…

Machine Learning · Computer Science 2025-12-09 Zitai Wang , Qianqian Xu , Zhiyong Yang , Zhikang Xu , Linchao Zhang , Xiaochun Cao , Qingming Huang

Emotion prediction is a key emerging research area that focuses on identifying and forecasting the emotional state of a human from multiple modalities. Among other data sources, physiological data can serve as an indicator for emotions with…

Machine Learning · Computer Science 2022-01-19 Maryam Khalid , Emily Willis

Automated facial expression analysis has a variety of applications in human-computer interaction. Traditional methods mainly analyze prototypical facial expressions of no more than eight discrete emotions as a classification task. However,…

Computer Vision and Pattern Recognition · Computer Science 2018-05-04 Feng Zhou , Shu Kong , Charless Fowlkes , Tao Chen , Baiying Lei

Class imbalance in real-world data poses a common bottleneck for machine learning tasks, since achieving good generalization on under-represented examples is often challenging. Mitigation strategies, such as under or oversampling the data…

Disordered Systems and Neural Networks · Physics 2025-02-03 Emanuele Loffredo , Mauro Pastore , Simona Cocco , Rémi Monasson

The task of roof damage classification and segmentation from overhead imagery presents unique challenges. In this work we choose to address the challenge posed due to strong class imbalance. We propose four distinct techniques that aim at…

Computer Vision and Pattern Recognition · Computer Science 2020-11-20 Jean-Baptiste Boin , Nat Roth , Jigar Doshi , Pablo Llueca , Nicolas Borensztein

Deep Neural Networks are often brittle on image classification tasks and known to misclassify inputs. While these misclassifications may be inevitable, all failure modes cannot be considered equal. Certain misclassifications (eg.…

Machine Learning · Computer Science 2021-11-03 Alberto Olmo , Sailik Sengupta , Subbarao Kambhampati

Class imbalance problems manifest in domains such as financial fraud detection or network intrusion analysis, where the prevalence of one class is much higher than another. Typically, practitioners are more interested in predicting the…

Machine Learning · Statistics 2017-11-16 Peter Xenopoulos

Traditional psychological evaluations rely heavily on human observation and interpretation, which are prone to subjectivity, bias, fatigue, and inconsistency. To address these limitations, this work presents a multimodal emotion recognition…

Human-Computer Interaction · Computer Science 2024-12-25 Kris Kraack

It is argued that for the computer to be able to interact with humans, it needs to have the communication skills of humans. One of these skills is the ability to understand the emotional state of the person. This thesis describes a neural…

Computer Vision and Pattern Recognition · Computer Science 2011-05-31 Yafei Sun

Small, imbalanced datasets and poor input image quality can lead to high false predictions rates with deep learning models. This paper introduces Class-Based Image Composition, an approach that allows us to reformulate training inputs…

Computer Vision and Pattern Recognition · Computer Science 2025-11-10 Hlali Azzeddine , Majid Ben Yakhlef , Soulaiman El Hazzat

Facial Expression Recognition (FER) systems based on deep learning have achieved impressive performance in recent years. However, these models often exhibit demographic biases, particularly with respect to age, which can compromise their…

Computer Vision and Pattern Recognition · Computer Science 2025-07-11 F. Xavier Gaya-Morey , Julia Sanchez-Perez , Cristina Manresa-Yee , Jose M. Buades-Rubio
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