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Expanding new functionalities efficiently is an ongoing challenge for single-turn task-oriented dialogue systems. In this work, we explore functionality-specific semi-supervised learning via self-training. We consider methods that augment…

Computation and Language · Computer Science 2019-10-11 Eunah Cho , He Xie , John P. Lalor , Varun Kumar , William M. Campbell

Weakly-supervised semantic segmentation under image tags supervision is a challenging task as it directly associates high-level semantic to low-level appearance. To bridge this gap, in this paper, we propose an iterative bottom-up and…

Computer Vision and Pattern Recognition · Computer Science 2018-06-13 Xiang Wang , Shaodi You , Xi Li , Huimin Ma

Text-to-image diffusion models can synthesize high-quality images, but they have various limitations. Here we highlight a common failure mode of these models, namely, generating uncommon concepts and structured concepts like hand palms. We…

Computer Vision and Pattern Recognition · Computer Science 2023-12-29 Dvir Samuel , Rami Ben-Ari , Simon Raviv , Nir Darshan , Gal Chechik

We address the problem of discovering part segmentations of articulated objects without supervision. In contrast to keypoints, part segmentations provide information about part localizations on the level of individual pixels. Capturing both…

Computer Vision and Pattern Recognition · Computer Science 2020-09-11 Sandro Braun , Patrick Esser , Björn Ommer

Recent years have seen rapid development in Information Extraction, as well as its subtask, Relation Extraction. Relation Extraction is able to detect semantic relations between entities in sentences. Currently, many efficient approaches…

Computation and Language · Computer Science 2024-03-19 Zhuang Li

Existing topic modeling and text segmentation methodologies generally require large datasets for training, limiting their capabilities when only small collections of text are available. In this work, we reexamine the inter-related problems…

Information Retrieval · Computer Science 2021-05-26 Qiong Wu , Adam Hare , Sirui Wang , Yuwei Tu , Zhenming Liu , Christopher G. Brinton , Yanhua Li

The lack of labeled data is a major obstacle to learning high-quality sentence embeddings. Recently, self-supervised contrastive learning (SCL) is regarded as a promising way to address this problem. However, the existing works mainly rely…

Computation and Language · Computer Science 2022-03-01 Junhan Yang , Zheng Liu , Shitao Xiao , Jianxun Lian , Lijun Wu , Defu Lian , Guangzhong Sun , Xing Xie

Word embeddings are trained to predict word cooccurrence statistics, which leads them to possess different lexical properties (syntactic, semantic, etc.) depending on the notion of context defined at training time. These properties manifest…

Computation and Language · Computer Science 2020-11-06 Jingyi He , KC Tsiolis , Kian Kenyon-Dean , Jackie Chi Kit Cheung

Existing works on semantic segmentation typically consider a small number of labels, ranging from tens to a few hundreds. With a large number of labels, training and evaluation of such task become extremely challenging due to correlation…

Computer Vision and Pattern Recognition · Computer Science 2018-08-21 Yufei Wang , Zhe Lin , Xiaohui Shen , Jianming Zhang , Scott Cohen

Unsupervised image captioning is a challenging task that aims at generating captions without the supervision of image-sentence pairs, but only with images and sentences drawn from different sources and object labels detected from the…

Computation and Language · Computer Science 2021-06-02 Ukyo Honda , Yoshitaka Ushiku , Atsushi Hashimoto , Taro Watanabe , Yuji Matsumoto

In the last few years, neural networks have been intensively used to develop meaningful distributed representations of words and contexts around them. When these representations, also known as "embeddings", are learned from unsupervised…

Computation and Language · Computer Science 2019-08-07 Giuseppe Marra , Andrea Zugarini , Stefano Melacci , Marco Maggini

The ability to quickly annotate medical imaging data plays a critical role in training deep learning frameworks for segmentation. Doing so for image volumes or video sequences is even more pressing as annotating these is particularly…

Computer Vision and Pattern Recognition · Computer Science 2021-07-20 Laurent Lejeune , Raphael Sznitman

Topic segmentation of meetings is the task of dividing multi-person meeting transcripts into topic blocks. Supervised approaches to the problem have proven intractable due to the difficulties in collecting and accurately annotating large…

Machine Learning · Computer Science 2021-06-25 Alessandro Solbiati , Kevin Heffernan , Georgios Damaskinos , Shivani Poddar , Shubham Modi , Jacques Cali

While current approaches for neural network training often aim at improving performance, less focus is put on training methods aiming at robustness towards varying noise conditions or directed attacks by adversarial examples. In this paper,…

Computer Vision and Pattern Recognition · Computer Science 2020-04-24 Marvin Klingner , Andreas Bär , Tim Fingscheidt

We propose a semi-supervised text classifier based on self-training using one positive and one negative property of neural networks. One of the weaknesses of self-training is the semantic drift problem, where noisy pseudo-labels accumulate…

Computation and Language · Computer Science 2024-01-02 Payam Karisani

Aspect-based sentiment analysis (ABSA) is a fine-grained sentiment analysis task which aims to extract the aspects from sentences and identify their corresponding sentiments. Aspect term extraction (ATE) is the crucial step for ABSA. Due to…

Computation and Language · Computer Science 2022-02-01 Xiang Chen , Xiaojun Wan

Feature selection aims to identify the optimal feature subset for enhancing downstream models. Effective feature selection can remove redundant features, save computational resources, accelerate the model learning process, and improve the…

Machine Learning · Computer Science 2024-12-19 Nanxu Gong , Wangyang Ying , Dongjie Wang , Yanjie Fu

To minimize the annotation costs associated with the training of semantic segmentation models, researchers have extensively investigated weakly-supervised segmentation approaches. In the current weakly-supervised segmentation methods, the…

Computer Vision and Pattern Recognition · Computer Science 2019-11-13 Wataru Shimoda , Keiji Yanai

The unsupervised pretraining of object detectors has recently become a key component of object detector training, as it leads to improved performance and faster convergence during the supervised fine-tuning stage. Existing unsupervised…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Ioannis Maniadis Metaxas , Adrian Bulat , Ioannis Patras , Brais Martinez , Georgios Tzimiropoulos

Topic models are frequently used in machine learning owing to their high interpretability and modular structure. However, extending a topic model to include a supervisory signal, to incorporate pre-trained word embedding vectors and to…

Machine Learning · Statistics 2019-09-17 Ryohei Hisano
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