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Learning decent representations from unlabeled time-series data with temporal dynamics is a very challenging task. In this paper, we propose an unsupervised Time-Series representation learning framework via Temporal and Contextual…

机器学习 · 计算机科学 2021-06-29 Emadeldeen Eldele , Mohamed Ragab , Zhenghua Chen , Min Wu , Chee Keong Kwoh , Xiaoli Li , Cuntai Guan

We compare different models for low resource multi-task sequence tagging that leverage dependencies between label sequences for different tasks. Our analysis is aimed at datasets where each example has labels for multiple tasks. Current…

计算与语言 · 计算机科学 2020-05-04 Jonas Pfeiffer , Edwin Simpson , Iryna Gurevych

Automatic Phoneme Recognition (APR) systems are often trained using pseudo phoneme-level annotations generated from text through Grapheme-to-Phoneme (G2P) systems. These G2P systems frequently output multiple possible pronunciations per…

音频与语音处理 · 电气工程与系统科学 2025-09-09 Henry Grafé , Hugo Van hamme

The transcription of handwritten text on images is one task in machine learning and one solution to solve it is using multi-dimensional recurrent neural networks (MDRNN) with connectionist temporal classification (CTC). The RNNs can contain…

人工智能 · 计算机科学 2019-08-28 G. Leifert , T. Strauß , T. Grüning , R. Labahn

In this paper we deal with the offline handwriting text recognition (HTR) problem with reduced training datasets. Recent HTR solutions based on artificial neural networks exhibit remarkable solutions in referenced databases. These deep…

计算机视觉与模式识别 · 计算机科学 2020-12-08 José Carlos Aradillas , Juan José Murillo-Fuentes , Pablo M. Olmos

Captcha are widely used to secure systems from automatic responses by distinguishing computer responses from human responses. Text, audio, video, picture picture-based Optical Character Recognition (OCR) are used for creating captcha.…

计算机视觉与模式识别 · 计算机科学 2024-02-09 Vaibhav Khatavkar , Makarand Velankar , Sneha Petkar

Automated Facial Expression Recognition (FER) has been a challenging task for decades. Many of the existing works use hand-crafted features such as LBP, HOG, LPQ, and Histogram of Optical Flow (HOF) combined with classifiers such as Support…

计算机视觉与模式识别 · 计算机科学 2020-04-17 Behzad Hasani , Mohammad H. Mahoor

Conditional Random Fields (CRFs) are undirected graphical models, a special case of which correspond to conditionally-trained finite state machines. A key advantage of these models is their great flexibility to include a wide array of…

机器学习 · 计算机科学 2012-12-12 Andrew McCallum

Typical human actions last several seconds and exhibit characteristic spatio-temporal structure. Recent methods attempt to capture this structure and learn action representations with convolutional neural networks. Such representations,…

计算机视觉与模式识别 · 计算机科学 2017-06-05 Gül Varol , Ivan Laptev , Cordelia Schmid

We have recently shown that deep Long Short-Term Memory (LSTM) recurrent neural networks (RNNs) outperform feed forward deep neural networks (DNNs) as acoustic models for speech recognition. More recently, we have shown that the performance…

计算与语言 · 计算机科学 2015-07-27 Haşim Sak , Andrew Senior , Kanishka Rao , Françoise Beaufays

Fine-grained action segmentation and recognition is an important yet challenging task. Given a long, untrimmed sequence of kinematic data, the task is to classify the action at each time frame and segment the time series into the correct…

计算机视觉与模式识别 · 计算机科学 2018-01-30 Effrosyni Mavroudi , Divya Bhaskara , Shahin Sefati , Haider Ali , René Vidal

Despite significant effort in understanding complex systems (CS), we lack a theory for modeling, inference, analysis and efficient control of time-varying complex networks (TVCNs) in uncertain environments. From brain activity dynamics to…

机器学习 · 计算机科学 2019-03-25 Gaurav Gupta , Sergio Pequito , Paul Bogdan

In this work we present a state-of-the-art approach for unconstrained natural scene text recognition. We propose a cascade approach that incorporates a convolutional neural network (CNN) architecture followed by a long short term memory…

计算机视觉与模式识别 · 计算机科学 2016-07-22 Ahmed Mamdouh A. Hassanien

Analyzing spatio-temporal data like video is a challenging task that requires processing visual and temporal information effectively. Convolutional Neural Networks have shown promise as baseline fixed feature extractors through transfer…

计算机视觉与模式识别 · 计算机科学 2017-11-06 Dillon Graham , Seyed Hamed Fatemi Langroudi , Christopher Kanan , Dhireesha Kudithipudi

Causal Temporal Representation Learning (Ctrl) methods aim to identify the temporal causal dynamics of complex nonstationary temporal sequences. Despite the success of existing Ctrl methods, they require either directly observing the domain…

机器学习 · 计算机科学 2024-09-06 Xiangchen Song , Zijian Li , Guangyi Chen , Yujia Zheng , Yewen Fan , Xinshuai Dong , Kun Zhang

This paper introduces a novel training framework called Focused Discriminative Training (FDT) to further improve streaming word-piece end-to-end (E2E) automatic speech recognition (ASR) models trained using either CTC or an interpolation of…

机器学习 · 计算机科学 2024-08-26 Adnan Haider , Xingyu Na , Erik McDermott , Tim Ng , Zhen Huang , Xiaodan Zhuang

Correlation filters are special classifiers designed for shift-invariant object recognition, which are robust to pattern distortions. The recent literature shows that combining a set of sub-filters trained based on a single or a small group…

计算机视觉与模式识别 · 计算机科学 2018-02-14 Baochang Zhang , Shangzhen Luan , Chen Chen , Jungong Han , Wei Wang , Alessandro Perina , Ling Shao

Temporal action segmentation tags action labels for every frame in an input untrimmed video containing multiple actions in a sequence. For the task of temporal action segmentation, we propose an encoder-decoder-style architecture named…

计算机视觉与模式识别 · 计算机科学 2022-12-22 Dipika Singhania , Rahul Rahaman , Angela Yao

In this paper we demonstrate continuous noisy speech recognition using connectionist temporal classification (CTC) model on limited Chinese vocabulary using electroencephalography (EEG) features with no speech signal as input and we further…

音频与语音处理 · 电气工程与系统科学 2020-03-02 Gautam Krishna , Co Tran , Yan Han , Mason Carnahan , Ahmed H Tewfik

Clinical Named Entity Recognition (CNER) aims to identify and classify clinical terms such as diseases, symptoms, treatments, exams, and body parts in electronic health records, which is a fundamental and crucial task for clinical and…

计算与语言 · 计算机科学 2018-11-28 Jiahui Qiu , Qi Wang , Yangming Zhou , Tong Ruan , Ju Gao