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We present the ADaptive Adversarial Imitation Learning (ADAIL) algorithm for learning adaptive policies that can be transferred between environments of varying dynamics, by imitating a small number of demonstrations collected from a single…

机器学习 · 计算机科学 2020-08-31 Yiren Lu , Jonathan Tompson

Most of the existing methods for anomaly detection use only positive data to learn the data distribution, thus they usually need a pre-defined threshold at the detection stage to determine whether a test instance is an outlier.…

机器学习 · 计算机科学 2019-03-19 Kai Tian , Shuigeng Zhou , Jianping Fan , Jihong Guan

We address the problem of universal domain adaptation (UDA) in ordinal regression (OR), which attempts to solve classification problems in which labels are not independent, but follow a natural order. We show that the UDA techniques…

计算机视觉与模式识别 · 计算机科学 2021-08-26 Boris Chidlovskii , Assem Sadek , Christian Wolf

Knowledge Distillation (KD) has been used in image classification for model compression. However, rare studies apply this technology on single-stage object detectors. Focal loss shows that the accumulated errors of easily-classified samples…

计算机视觉与模式识别 · 计算机科学 2019-01-15 Shitao Tang , Litong Feng , Wenqi Shao , Zhanghui Kuang , Wei Zhang , Yimin Chen

Current reinforcement learning objectives for large-model reasoning primarily focus on maximizing expected rewards. This paradigm can lead to overfitting to dominant reward signals, while neglecting alternative yet valid reasoning…

机器学习 · 计算机科学 2026-02-24 Wendi Li , Sharon Li

Federated Learning (FL) marks a transformative approach to distributed model training by combining locally optimized models from various clients into a unified global model. While FL preserves data privacy by eliminating centralized…

机器学习 · 计算机科学 2026-01-08 Pranab Sahoo , Ashutosh Tripathi , Sriparna Saha , Samrat Mondal

General unsupervised learning is a long-standing conceptual problem in machine learning. Supervised learning is successful because it can be solved by the minimization of the training error cost function. Unsupervised learning is not as…

机器学习 · 计算机科学 2015-12-04 Ilya Sutskever , Rafal Jozefowicz , Karol Gregor , Danilo Rezende , Tim Lillicrap , Oriol Vinyals

Supervised anomaly detection methods perform well in identifying known anomalies that are well represented in the training set. However, they often struggle to generalise beyond the training distribution due to decision boundaries that lack…

Out-of-Distribution (OOD) detection is essential in real-world applications, which has attracted increasing attention in recent years. However, most existing OOD detection methods require many labeled In-Distribution (ID) data, causing a…

机器学习 · 计算机科学 2022-10-14 Yi-Xuan Sun , Wei Wang

Label Distribution Learning (LDL) assigns soft labels, a.k.a. degrees, to a sample. In reality, it is always laborious to obtain complete degrees, giving birth to the Incomplete LDL (InLDL). However, InLDL often suffers from performance…

机器学习 · 计算机科学 2024-06-11 Xiang Li , Songcan Chen

This paper introduces RankMatch, an innovative approach for Semi-Supervised Label Distribution Learning (SSLDL). Addressing the challenge of limited labeled data, RankMatch effectively utilizes a small number of labeled examples in…

机器学习 · 计算机科学 2023-12-12 Kouzhiqiang Yucheng Xie , Jing Wang , Yuheng Jia , Boyu Shi , Xin Geng

Ordinal regression (OR) is classification of ordinal data in which the underlying categorical target variable has a natural ordinal relation for the underlying explanatory variable. For $K$-class OR tasks, threshold methods learn a…

机器学习 · 计算机科学 2024-05-22 Ryoya Yamasaki , Toshiyuki Tanaka

Debiased machine learning estimators for smooth functionals in nonparametric models can exhibit substantial variability and instability, often leading practitioners to instead rely on parametric or semiparametric working models. Such…

统计方法学 · 统计学 2026-03-20 Lars van der Laan , Marco Carone , Alex Luedtke , Mark van der Laan

This paper proposes a novel pixel-level distribution regularization scheme (DRSL) for self-supervised domain adaptation of semantic segmentation. In a typical setting, the classification loss forces the semantic segmentation model to…

计算机视觉与模式识别 · 计算机科学 2022-06-22 Javed Iqbal , Hamza Rawal , Rehan Hafiz , Yu-Tseh Chi , Mohsen Ali

Adversarial discriminative domain adaptation (ADDA) is an efficient framework for unsupervised domain adaptation in image classification, where the source and target domains are assumed to have the same classes, but no labels are available…

计算机视觉与模式识别 · 计算机科学 2019-11-12 Aaron Chadha , Yiannis Andreopoulos

Medical image classification is often challenging for two reasons: a lack of labelled examples due to expensive and time-consuming annotation protocols, and imbalanced class labels due to the relative scarcity of disease-positive…

计算机视觉与模式识别 · 计算机科学 2021-08-23 Tri Huynh , Aiden Nibali , Zhen He

Unsupervised anomaly detection in medical imaging aims to detect and localize arbitrary anomalies without requiring annotated anomalous data during training. Often, this is achieved by learning a data distribution of normal samples and…

计算机视觉与模式识别 · 计算机科学 2023-01-06 Carsten T. Lüth , David Zimmerer , Gregor Koehler , Paul F. Jaeger , Fabian Isensee , Jens Petersen , Klaus H. Maier-Hein

We propose an approach for unsupervised adaptation of object detectors from label-rich to label-poor domains which can significantly reduce annotation costs associated with detection. Recently, approaches that align distributions of source…

计算机视觉与模式识别 · 计算机科学 2019-04-09 Kuniaki Saito , Yoshitaka Ushiku , Tatsuya Harada , Kate Saenko

An ordinal classification problem is one in which the target variable takes values on an ordinal scale. Nowadays, there are many of these problems associated with real-world tasks where it is crucial to accurately classify the extreme…

Current deep regression models usually learn in a point-wise way that treats each sample as an independent input, neglecting the relative ordering among different data. Consequently, the regression model could neglect the data's…

机器学习 · 计算机科学 2025-02-11 Fuhang Liang , Rucong Xu , Deng Lin