Welcome to the


The Pattern Recognition and Human Language Technology (PRHLT) research center is composed by researchers from the Universitat Politècnica de València (UPV) in the areas of Multimodal Interaction, Pattern Recognition, Image Processing (Image Analysis, Computer Vision, Handwritten Text Recognition, Document Analysis) and Language Processing (Speech Recognition and Understanding, Machine Translation, Information Retrieval).

The PRHLT center is an active research entity with important ongoing research projects, technology transfer activities, and research publications.


Big data and deep learning

“Machine Learning is the new electricity” Deep Learning is a technique that belongs to the Machine Learning Field. Machine Learning techniques learns from data. Nowadays the amount of data grows exponentially year after year. Therefore machine learning techniques obtain a great potential to solve very complex problems. Big-data is the perfect partner and deep learning techniques are becoming a standard thanks to the hardware and software advances. In PRHLT we have [...]

Read more


Speech processing and dialogue systems

Speech-to-speech translation or text-to-text translation for limited domains fall within these kind of projects. Finite-state and statistical transducers are used as the basis of the machine translation systems. These models can be learnt automatically from real examples of translation. Some applications included (but are not limited to) translation of technical reports, hotel services, Speech interaction with mobile devices Speaker and domain adaptation Statistical dialogue annotation models Multimodal speech recognition

Read more


Handwritten Text Recognition

Both off-line (document images) and on-line HTR (tablet or e-pen signals) are considered. No prior character or word segmentation is needed. Technology, borrowed from Speech Recognition, relies on character Hidden Markov Models, Finite State word models, and syntactic N-Grams. After model training, for each given text line image, a holistic (“Viterbi”) search provides both an optimal transcription and the corresponding word and character segmentations. Applications: Transcription of ancient and legacy [...]

Read more


Computer vision

General Statistical and Syntactic Pattern Recognition techniques for image analysis and recognition. Some applications: OCR and document analysis, medical diagnosis, biometric identification, image and video retrieval. Relevance-based Image Retrieval Biometrics

Read more


Language translation

The activities of the Machine Translation group began some years ago with the use of finite-state models for speech-to-speech translation and for text-to-text translation in limited domains. This group has developped a number of translation models with the corresponding learning algorithms and a number of prototypes for speech translation and computer-assisted translation. Currently, the Machine Translation group is devoted to the development of new interactive-predictive techniques for computer-assisted translation, techniques for [...]

Read more


Natural Language Processing

For many languages that use non-Roman based indigenous scripts (e.g., Arabic, Greek and Indic languages) one can often find a large amount of user generated transliterated content on the Web in the Roman script. IR in such space is challenging because queries written in either the native or the Roman scripts need to be matched to the documents written in both the scripts. Moreover, transliterated content features extensive spelling variations. [...]

Read more

Current Projects

READ: Recognition and Enrichment of Archival Documents

The overall objective of READ is to implement a Virtual Research Environment where archivists, humanities scholars, computer scientists and volunteers are collaborating with the ultimate goal of boosting research, innovation, development and usage of cutting edge technology for the automated recognition, transcription, indexing and enrichment of handwritten archival documents. This Virtual Research Environment will not be built from the ground up, but will benefit from research, tools, data and [...]

Duration: 1 February 2017 to 30 June 2019
Read more

ALMAMATER: Adaptive Learning and MultimodAlity in MAchine Translation and tExt tRanscription

ALMAMATER pretende seguir impulsando y llegar a consolidar el marco de investigación que pretende explorar los retos y oportunidades que ofrece la adaptación de la tecnología existente de Reconocimiento de Formas (RF) en un entorno de interacción con el usuario. Concretamente, a partir de los trabajos realizados hasta ahora en el proyecto PROMETEO sobre el aprovechamiento de la realimentación proporcionada por el usuario en cada interacción, se va a trabajar [...]

Duration: 1 January 2014 to 31 December 2017
Read more

HIMANIS: HIstorical MANuscript Indexing for user-controlled Search

Manuscripts are among the most important witnesses to our European shared cultural heritage. In recent years, large quantities of historical handwritten documents are being scanned and made available through web portals. Yet, the wealth of information conveyed by the text captured in these images remains largely inaccessible. General users and researchers more and more expect to query handwritten resources in plain text like printed books, but current handwritten text recognition [...]

Duration: 1 November 2015 to 31 October 2017
Read more

SomEMBED: SOcial Media language understanding-EMBEDing contexts

SomEMBED (SOcial Media language understanding – EMBEDing contexts) is a coordinated project whose goal is to advance in the area of Computational Linguistics (CL) and in Natural Language Processing (NLP) in order to deal with and solve the challenges posed by the use of language in the social media: (i) from CL, our goal is to develop techniques and methods for modeling non-standard language from representative corpus of the social [...]

Duration: 1 January 2016 to 31 December 2018
Read more

CoMUN-HaT: Contexto, multimodalidad y colaboración del usuario en procesado de texto manuscrito

Processing of handwritten documents is a task that is of wide interest for many purposes, such as those related to preserve cultural heritage. Handwritten text recognition techniques have been successfully applied during the last decade to obtain transcriptions of handwritten documents, and keyword spotting techniques have been applied for searching specific terms in image collections of handwritten documents. However, results on transcription and indexing are far from perfect, although models [...]

Duration: 1 January 2016 to 31 December 2018
Read more

Arabic Author Profiling for Cyber-Security

Cyber-security has evolved to a key priority for Qatar and all nations over the world. Malicious actors from anywhere misuse the cyberspace to perpetrate various crimes such as phishing, Cyber-blackmailing, Cyber-bullying, and communicating or planning terrorist attacks using social media. For instance, there is a tendency from these cybercriminals to use similar writing styles in their messages, which makes it possible for security experts to detect and stop these threats [...]

Duration: 4 February 2017 to 4 February 2020
Members: P. Rosso
Read more

Latest News

More news

Valencia acoge el mayor encuentro europeo de Lingüística Computacional

La 15ª edición de la conferencia de la European Chapter of the Association for Computational Linguistics (EACL), que se celebra en el Palacio de Congresos de Valencia, es uno de [...]

Laia: A deep learning toolkit for HTR

Three members of this center, Joan Puigcerver, Daniel Martin-Albo and Mauricio Villegas, have released the first version of an open source deep learning toolkit for handwritten text recognition. Good job! Find [...]

BDVA 2016 Valencia Summit

La Universitat Politècnica de València acogerá la tercera edición del Summit, organizado por la Big Data Value Association (BDVA), que tendrá lugar en Valencia del 29 de noviembre al 2 [...]


PRHLT Research Center
Universitat Politècnica de València
Ciudad Politécnica la Innovación
Edif. 8B Acceso N Planta 0
Camí de Vera, s/n
46022 Valencia (VLC), Spain
(+34) 96 387 81 70
Contact form

Write the text below (required)