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Handwritten text recognition has been developed rapidly in the recent years, following the rise of deep learning and its applications. Though deep learning methods provide notable boost in performance concerning text recognition,…

Computer Vision and Pattern Recognition · Computer Science 2024-04-18 George Retsinas , Giorgos Sfikas , Basilis Gatos , Christophoros Nikou

Handwritten character recognition (HCR) is a challenging problem for machine learning researchers. Unlike printed text data, handwritten character datasets have more variation due to human-introduced bias. With numerous unique character…

Computer Vision and Pattern Recognition · Computer Science 2024-03-28 Boris Kriuk , Fedor Kriuk

Handwritten Mathematical Expression Recognition (HMER) remains a persistent challenge in Optical Character Recognition (OCR) due to the inherent freedom of symbol layouts and variability in handwriting styles. Prior methods have faced…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Yu Li , Jin Jiang , Jianhua Zhu , Shuai Peng , Baole Wei , Yuxuan Zhou , Liangcai Gao

In this paper, we explore the class of the Hidden Semi-Markov Model (HSMM), a flexible extension of the popular Hidden Markov Model (HMM) that allows the underlying stochastic process to be a semi-Markov chain. HSMMs are typically used less…

Applications · Statistics 2023-01-26 Patrick Aschermayr , Konstantinos Kalogeropoulos

The anti-interference capability of wireless links is a physical layer problem for edge computing. Although convolutional codes have inherent error correction potential due to the redundancy introduced in the data, the performance of the…

Information Theory · Computer Science 2022-11-15 Haoyu Li , Xuan Wang , Tong Liu , Dingyi Fang , Baoying Liu

Identification of minimum number of local regions of a handwritten character image, containing well-defined discriminating features which are sufficient for a minimal but complete description of the character is a challenging task. A new…

Computer Vision and Pattern Recognition · Computer Science 2016-05-03 Ritesh Sarkhel , Amit K Saha , Nibaran Das

Handwritten mathematical expression recognition (HMER) is an important research direction in handwriting recognition. The performance of HMER suffers from the two-dimensional structure of mathematical expressions (MEs). To address this…

Computer Vision and Pattern Recognition · Computer Science 2020-07-21 Zhe Li , Lianwen Jin , Songxuan Lai , Yecheng Zhu

Hidden Markov Models (HMMs) are a ubiquitous tool to model time series data, and have been widely used in two main tasks of Automatic Music Transcription (AMT): note segmentation, i.e. identifying the played notes after a multi-pitch…

Machine Learning · Statistics 2017-04-13 D. Cazau , G. Nuel

Many different machine learning and deep learning techniques have been successfully employed for malware detection and classification. Examples of popular learning techniques in the malware domain include Hidden Markov Models (HMM), Random…

Cryptography and Security · Computer Science 2023-07-21 Ritik Mehta , Olha Jurečková , Mark Stamp

This paper deals with the task of practical and open source Handwritten Text Recognition (HTR) on German medieval manuscripts. We report on our efforts to construct mixed recognition models which can be applied out-of-the-box without any…

Computer Vision and Pattern Recognition · Computer Science 2022-01-20 Christian Reul , Stefan Tomasek , Florian Langhanki , Uwe Springmann

Sensors on mobile devices---accelerometers, gyroscopes, pressure meters, and GPS---invite new applications in gesture recognition, gaming, and fitness tracking. However, programming them remains challenging because human gestures captured…

Computer Vision and Pattern Recognition · Computer Science 2017-10-27 Diman Zad Tootaghaj , Adrian Sampson , Todd Mytkowicz , Kathryn S McKinley

The EM procedure is a principal tool for parameter estimation in the hidden Markov models. However, applications replace EM by Viterbi extraction, or training (VT). VT is computationally less intensive, more stable and has more of an…

Computation · Statistics 2008-12-18 Jüri Lember , Alexey Koloydenko

Handwriting Recognition has been a field of great interest in the Artificial Intelligence domain. Due to its broad use cases in real life, research has been conducted widely on it. Prominent work has been done in this field focusing mainly…

Computer Vision and Pattern Recognition · Computer Science 2023-03-07 Minhaz Kamal , Fairuz Shaiara , Chowdhury Mohammad Abdullah , Sabbir Ahmed , Tasnim Ahmed , Md. Hasanul Kabir

As deep neural networks continue to revolutionize various application domains, there is increasing interest in making these powerful models more understandable and interpretable, and narrowing down the causes of good and bad predictions. We…

Machine Learning · Statistics 2016-11-21 Viktoriya Krakovna , Finale Doshi-Velez

Recently, the hybrid convolutional neural network hidden Markov model (CNN-HMM) has been introduced for offline handwritten Chinese text recognition (HCTR) and has achieved state-of-the-art performance. However, modeling each of the large…

Computer Vision and Pattern Recognition · Computer Science 2019-09-23 Zi-Rui Wang , Jun Du , Jia-Ming Wang

Since the early days of digital communication, Hidden Markov Models (HMMs) have now been routinely used in speech recognition, processing of natural languages, images, and in bioinformatics. An HMM $(X_i,Y_i)_{i\ge 1}$ assumes observations…

Statistics Theory · Mathematics 2009-02-06 J. Lember , A. Koloydenko

The paper discusses an approach to decipher large collections of handwritten index cards of historical dictionaries. Our study provides a working solution that reads the cards, and links their lemmas to a searchable list of dictionary…

Computation and Language · Computer Science 2023-03-30 Jan Idziak , Artjoms Šeļa , Michał Woźniak , Albert Leśniak , Joanna Byszuk , Maciej Eder

Recognition of Arabic characters is essential for natural language processing and computer vision fields. The need to recognize and classify the handwritten Arabic letters and characters are essentially required. In this paper, we present…

Computer Vision and Pattern Recognition · Computer Science 2020-09-29 Mahmoud Shams , Amira. A. Elsonbaty , Wael. Z. ElSawy

We introduce a quantum Viterbi decoding algorithm for hidden quantum Markov models (HQMMs) motivated by quantum information processing and quantum algorithms. Given a finite sequence of measurement outcomes, the algorithm identifies hidden…

Recently, hidden Markov models (HMMs) have achieved promising results for offline handwritten Chinese text recognition. However, due to the large vocabulary of Chinese characters with each modeled by a uniform and fixed number of hidden…

Computer Vision and Pattern Recognition · Computer Science 2018-08-14 Wenchao Wang , Jun Du , Zi-Rui Wang