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Temporal action localization presents a trade-off between test performance and annotation-time cost. Fully supervised methods achieve good performance with time-consuming boundary annotations. Weakly supervised methods with cheaper…

计算机视觉与模式识别 · 计算机科学 2020-07-06 Xinpeng Ding , Nannan Wang , Xinbo Gao , Jie Li , Xiaoyu Wang , Tongliang Liu

Existing weak supervision approaches use all the data covered by weak signals to train a classifier. We show both theoretically and empirically that this is not always optimal. Intuitively, there is a tradeoff between the amount of…

机器学习 · 统计学 2023-03-08 Hunter Lang , Aravindan Vijayaraghavan , David Sontag

Deep supervised models have an unprecedented capacity to absorb large quantities of training data. Hence, training on multiple datasets becomes a method of choice towards strong generalization in usual scenes and graceful performance…

计算机视觉与模式识别 · 计算机科学 2024-03-13 Petra Bevandić , Marin Oršić , Ivan Grubišić , Josip Šarić , Siniša Šegvić

Hierarchical text classification has many real-world applications. However, labeling a large number of documents is costly. In practice, we can use semi-supervised learning or weakly supervised learning (e.g., dataless classification) to…

机器学习 · 计算机科学 2019-02-26 Huiru Xiao , Xin Liu , Yangqiu Song

Sequential sensor data is generated in a wide variety of practical applications. A fundamental challenge involves learning effective classifiers for such sequential data. While deep learning has led to impressive performance gains in recent…

机器学习 · 计算机科学 2020-10-07 Nauman Ahad , Mark A. Davenport

Human activity recognition (HAR) using wearable sensors has advanced through various machine learning paradigms, each with inherent trade-offs between performance and labeling requirements. While fully supervised techniques achieve high…

机器学习 · 计算机科学 2025-12-24 Taoran Sheng , Manfred Huber

Since data is the fuel that drives machine learning models, and access to labeled data is generally expensive, semi-supervised methods are constantly popular. They enable the acquisition of large datasets without the need for too many…

机器学习 · 计算机科学 2023-01-12 Jędrzej Kozal , Michał Woźniak

We explore the value of weak labels in learning transferable representations for medical images. Compared to hand-labeled datasets, weak or inexact labels can be acquired in large quantities at significantly lower cost and can provide…

计算机视觉与模式识别 · 计算机科学 2021-08-05 Boon Peng Yap , Beng Koon Ng

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…

计算机视觉与模式识别 · 计算机科学 2019-08-28 Fidel A. Guerrero-Peña , Pedro D. Marrero Fernandez , Tsang Ing Ren , Alexandre Cunha

Self-supervised learning, which learns by constructing artificial labels given only the input signals, has recently gained considerable attention for learning representations with unlabeled datasets, i.e., learning without any…

机器学习 · 计算机科学 2020-06-30 Hankook Lee , Sung Ju Hwang , Jinwoo Shin

In recent years, supervised person re-identification (re-ID) models have received increasing studies. However, these models trained on the source domain always suffer dramatic performance drop when tested on an unseen domain. Existing…

计算机视觉与模式识别 · 计算机科学 2021-02-24 Hao Feng , Minghao Chen , Jinming Hu , Dong Shen , Haifeng Liu , Deng Cai

Real-world data often exhibits long-tailed distributions with heavy class imbalance, posing great challenges for deep recognition models. We identify a persisting dilemma on the value of labels in the context of imbalanced learning: on the…

机器学习 · 计算机科学 2020-09-29 Yuzhe Yang , Zhi Xu

Semi-supervised learning frameworks usually adopt mutual learning approaches with multiple submodels to learn from different perspectives. To avoid transferring erroneous pseudo labels between these submodels, a high threshold is usually…

计算机视觉与模式识别 · 计算机科学 2023-01-11 Hao Xu , Hui Xiao , Huazheng Hao , Li Dong , Xiaojie Qiu , Chengbin Peng

Many datasets and approaches in ambient sound analysis use weakly labeled data.Weak labels are employed because annotating every data sample with a strong label is too expensive.Yet, their impact on the performance in comparison to strong…

声音 · 计算机科学 2020-12-08 Nicolas Turpault , Romain Serizel , Emmanuel Vincent

Semi-supervised learning has made significant strides in the medical domain since it alleviates the heavy burden of collecting abundant pixel-wise annotated data for semantic segmentation tasks. Existing semi-supervised approaches enhance…

计算机视觉与模式识别 · 计算机科学 2021-12-03 Xu Zheng , Chong Fu , Haoyu Xie , Jialei Chen , Xingwei Wang , Chiu-Wing Sham

Landmark detection algorithms trained on high resolution images perform poorly on datasets containing low resolution images. This deters the performance of algorithms relying on quality landmarks, for example, face recognition. To the best…

计算机视觉与模式识别 · 计算机科学 2019-08-01 Amit Kumar , Rama Chellappa

While self-training has advanced semi-supervised semantic segmentation, it severely suffers from the long-tailed class distribution on real-world semantic segmentation datasets that make the pseudo-labeled data bias toward majority classes.…

计算机视觉与模式识别 · 计算机科学 2021-07-27 Ruifei He , Jihan Yang , Xiaojuan Qi

Weakly supervised data are widespread and have attracted much attention. However, since label quality is often difficult to guarantee, sometimes the use of weakly supervised data will lead to unsatisfactory performance, i.e., performance…

机器学习 · 计算机科学 2019-04-23 Lan-Zhe Guo , Yu-Feng Li , Ming Li , Jin-Feng Yi , Bo-Wen Zhou , Zhi-Hua Zhou

Long-tailed data is prevalent in real-world classification tasks and heavily relies on supervised information, which makes the annotation process exceptionally labor-intensive and time-consuming. Unfortunately, despite being a common…

机器学习 · 计算机科学 2024-12-04 Meng Wei , Zhongnian Li , Yong Zhou , Xinzheng Xu

Weakly-supervised object localization (WSOL) has gained popularity over the last years for its promise to train localization models with only image-level labels. Since the seminal WSOL work of class activation mapping (CAM), the field has…

计算机视觉与模式识别 · 计算机科学 2021-12-08 Junsuk Choe , Seong Joon Oh , Sanghyuk Chun , Seungho Lee , Zeynep Akata , Hyunjung Shim