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  • Variable linkage for multimedia metadata schema matching

     Nin Guerrero, Jordi; Tous Liesa, Ruben; Delgado Mercé, Jaime
    Multimedia tools and applications
    Date of publication: 2014-02-01
    Journal article

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    Today there are many media sharing applications that use diverse metadata formats to describe media resources. This leads to interoperability issues in cataloguing, searching and annotation. This situation poses schema matching algorithms in the eye of the storm of metadata interoperability. In this paper we present two different solutions for multimedia metadata schema matching using variable linkage algorithms. These methods consist in directly comparing the data values stored in the different metadata variables, allowing to overcome the inherent limitations of schema-level matching approaches. We show the feasibility of these methods through some experiments with real metadata information extracted from the image hosting websites Deviantart, Flickr and Picasa.

  • La influencia del orden de las preguntas en los exámenes de primer curso

     Lopez Alvarez, David; Cortes Martinez, Jordi; Fernandez Barta, Montserrat; Parcerisa Bundó, Joan Manuel; Tous Liesa, Ruben; Tubella Murgadas, Jordi
    Jornadas de Enseñanza Universitaria de la Informática
    Presentation's date: 2013-07-10
    Presentation of work at congresses

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    El orden de las preguntas en un examen no debería tener influencia en sus resultados. Sin embargo, los autores tenemos la sensación de que los estudiantes de primero suelen ser secuenciales a la hora de resolver los exámenes. ¿Lo son realmente?, y si lo son ¿afecta esta manera de contestar los exámenes a los resultados finales? En este artículo analizamos estas cuestiones con un experimento realizado en la asignatura Estructura de Computadores, de primer curso del grado en Ingeniería Informática.

  • JPEG's JPsearch standard: harmonizing image management and search

     Doller, Mario; Tous Liesa, Ruben; Temmermans, Frederik; Yoon, Kyoungro; Park, Jeho; Kim, Youngseop; Stegmaier, Florian; Delgado Mercé, Jaime
    IEEE multimedia
    Date of publication: 2013-10
    Journal article

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    Triggered by the rise of social networks, community-based image sharing platforms are emerging at an increasing rate. Currently, almost every repository offers a different interaction interface and metadata description format. Unfortunately, this prevents unified and efficient access to these repositories. Consequently, data exchange between systems is often cumbersome. In this context, ISO/IEC JTC1 SC29 WG1 (more commonly known as JPEG) initiated the JPSearch framework standardization, which aims to foster the interaction with and among image repositories. The standard focuses on three main cornerstones supporting repository synchronization, search and access, and image collection creation and maintenance. This article discusses the main concepts, parts, and achievements of the JPSearch framework and demonstrates its use through a set of substantial case studies.

  • Standards for query formalization in mobile visual search

     Tous Liesa, Ruben; Delgado Mercé, Jaime
    Date of publication: 2012-05-04
    Book chapter

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    The research around visual search is gaining relevance due to the evolution in the generation and usage of digital images. A significant push comes from the mobile visual search topic, due to the widespread proliferation of camera enabled mobile devices. The new scenarios are increasing the urgency of novel solutions for challenging problems such as the efficient coding of compact visual descriptors and the interoperability of distributed visual search query interfaces. Currently, almost every visual search service offers a different retrieval interface and image metadata description format, preventing unified and efficient access. In this context, standardization groups such as ISO/IEC SC29/WG11 (MPEG) and ISO/IEC SC29/WG1 (JPEG) have been working to create unified interfaces for image repositories. In one hand, MPEG provides the ISO/IEC 15938-12 (MPEG Query Format, MPQF), which standardizes a query language for multimedia repositories and has also started an activity for standardizing compact descriptors for visual search (CDVS). On the other hand, JPEG is now finishing the ISO/IEC 24800 (JPSearch), which provides solutions to the image metadata interoperability problem. This paper analyzes how these standardization activities can be combined to satisfy the requirements posed by the mobile visual search scenario, which are their limitations and which are the necessary actions to be taken by the standardization committees in order to overcome them.

  • Computer-assisted diagnosis of confocal laser endomicroscopy (CLE) by a novel image analysis and semantic annotation method

     Tous Liesa, Ruben; Ballester Ripoll, Rafael; Delgado Mercé, Jaime; Kiesslich, Ralf; Goetz, Martin
    Gastrointestinal endoscopy
    Date of publication: 2012-04
    Journal article

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  • JPSearch: new international standard providing interoperable framework for image search and sharing

     Yoon, Kyoungro; Kim, Youngseop; Park, Je-Ho; Delgado Mercé, Jaime; Yamada, Akio; Dufaux, Frederic; Tous Liesa, Ruben
    Signal processing: image communication
    Date of publication: 2012-08
    Journal article

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    For the last 15 years, there have been various research and great advances in the field of content-based search and retrieval of images. In this paper, we present an overview of the JPSearch Standard, which is a recently published set of international standards providing interoperable framework for image search and sharing. The JPSearch standard is composed of six parts, which are Part 1: System framework and components, Part 2: Registration, identification and management of schema and ontology, Part 3: Query format, Part 4: File format for metadata embedded in image data (JPEG and JPEG 2000), Part 5: Data interchange format between image repositories, Part 6: Reference software. The Part 1 provides motivation and overview of the JPSearch framework. The Part 2 supports interoperability among various metadata specifications and social tagging using the specification of core metadata and translation rule description language. The Part 3 provides powerful image query language for interoperability among multiple image databases. The Part 4 specifies a file format based on JPEG and JPEG 2000 file format in which arbitrary number of metadata description of a image can be embedded. The Part 5 supports interoperability in interchanging images with metadata between image repositories. Finally, the Part 6 provides reference and utility softwares based on which the JPSearch compliant systems can be easily developed. In this paper, summaries and usage examples for each part of the JPSearch standard are presented.

  • The anatomy of an optical biopsy semantic retrieval system

     Tous Liesa, Ruben; Delgado Mercé, Jaime; Zinkl, Thomas; Toran, Pere; Alcalde Pérez, Alma Gabriela; Goetz, Martin; Ferrer-Roca, Olga
    IEEE multimedia
    Date of publication: 2012-02
    Journal article

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  • PROTECCION, BUSQUEDA E INTEROPERABILIDAD DE CONTENIDOS MULTIMEDIA: NUEVAS TECNICAS Y APLICACIONES

     Llorente Viejo, Silvia; Tous Liesa, Ruben; Rodriguez Luna, Eva; Gallego Fernandez, M. Isabel; Rodriguez Doncel, Victor; Alcalde Pérez, Alma Gabriela; Torres Urgell, Luis; Tarres Ruiz, Francisco; Nin Guerrero, Jordi; Toran, Pere; Delgado Mercé, Jaime
    Participation in a competitive project

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  • Uniform query formalization in mobile visual search: from standards to practice

     Tous Liesa, Ruben; Delgado Mercé, Jaime
    Signal processing: image communication
    Date of publication: 2012-09
    Journal article

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  • Approaches and standards for metadata interoperability in distributed image search and retrieval

     Tous Liesa, Ruben; Nin Guerrero, Jordi; Delgado Mercé, Jaime; Toran, Pere
    International Conference on Database and Expert Systems Applications
    Presentation's date: 2011
    Presentation of work at congresses

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    Standards for query formalization in mobile visual search  Open access

     Tous Liesa, Ruben; Delgado Mercé, Jaime
    International ICST Mobile Multimedia Communications Conference
    Presentation's date: 2011-11-06
    Presentation of work at congresses

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    The research around visual search is gaining relevance due to the evolution in the generation and usage of digital images. A signifi cant push comes from the mobile visual search topic, due to the widespread proliferation of camera enabled mobile devices. The new scenarios are increasing the urgency of novel solutions for challenging problems such as the effi cient coding of compact visual descriptors and the interoperability of distributed visual search query interfaces. Currently, almost every visual search service off ers a different retrieval interface and image metadata description format, preventing unified and effi cient access. In this context, standardization groups such as ISO/IEC SC29/WG11 (MPEG) and ISO/IEC SC29/WG1 (JPEG) have been working to create uni fied interfaces for image repositories. In one hand, MPEG provides the ISO/IEC 15938-12 (MPEG Query Format, MPQF), which standardizes a query language for multimedia repositories and has also started an activity for standardizing compact descriptors for visual search (CDVS). On the other hand, JPEG is now finishing the ISO/IEC 24800 (JPSearch), which provides solutions to the image metadata interoperability problem. This paper analyzes how these standardization activities can be combined to satisfy the requirements posed by the mobile visual search scenario, which are their limitations and which are the necessary actions to be taken by the standardization committees in order to overcome them.

    Postprint (author’s final draft)

  • Optical biopsy data base content retrieval with a smartphone

     Tous Liesa, Ruben; Delgado Mercé, Jaime; Ferrer-Roca, Olga
    Winter Course of the CATAI
    Presentation's date: 2011-04-02
    Presentation of work at congresses

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  • Semantic Web for Reliable Citation Analysis in Scholarly Publishing

     Tous Liesa, Ruben; Guerrero Zapata, Manel; Delgado Mercé, Jaime
    Information technology and libraries
    Date of publication: 2011-03
    Journal article

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  • CBIR - Content based information retrieval in Optical Biopsies

     Tous Liesa, Ruben; Ferrer-Roca, Olga; Delgado Mercé, Jaime
    Winter Course of the CATAI
    Presentation's date: 2010
    Presentation of work at congresses

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    The present paper describes the design and usage of an Internet medical image search engine based on the queryby-example paradigm and the multimedia standard ISO-15938-12:2008. The system, which allows combining Content Based Information Retrieval (CBIR) techniques such as “query by image” with traditional XML metadata filtering, is applied to annotate and query Optical Biopsies-OB (in the present case Confocal endomicroscopy-CEM). The OB-CEM are taken by endoscopists, not trained in microscopic morphology which is the domain of the surgical pathology. To gain diagnostic confidence the endoscopists could consult the images to a pathologist or could use the system proposed in the paper. That is, to search for similar images to compare the diagnosis.

  • Query by image medical training: optical biopsy with confocal endoscopy (OB-CEM)

     Ferrer-Roca, Olga; Duval, Vinicius; Delgado Mercé, Jaime; Rolim, Claudio; Tous Liesa, Ruben
    International Conference on Health Informatics
    Presentation's date: 2010-01-21
    Presentation of work at congresses

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  • Standardized interoperable image retrieval

     Döller, Mario; Stegmaier, Florian; Kosch, Harald; Tous Liesa, Ruben; Delgado Mercé, Jaime
    ACM Symposium on Applied Computing
    Presentation's date: 2010
    Presentation of work at congresses

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    Digital still images are generated, distributed and stored worldwide at an ever increasing rate. Yet, the large number of available metadata description formats prevents consistent and efficient access to image repositories. Standardized solutions for unifying the access and the retrieval of image repositories are therefore strongly needed. The ISO/IEC SC29 WG1 (more commonly known as JPEG) established the JPSearch project, which aims to standardize interfaces of an abstract image retrieval framework. In this context, the paper introduces our contribution consisting of a reference metadata model, which in combination with the JPEG query format improves interoperable image retrieval for users. Second, a transformation rule declaration language for query reformulation is presented, which contributes to interoperability at the repository side.

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    Reliable scholarly objects search and interchange framework  Open access

     Torres, Victor; Tous Liesa, Ruben; Delgado Mercé, Jaime
    International Conference on Electronic Publishing
    Presentation's date: 2010-06-17
    Presentation of work at congresses

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    Authors of scholarly objects might fear that there is a potential risk that the original material they publish in online sites or that they submit for evaluation to scientific journals or conferences is used by others as their own material. In such cases, it would not be easy for the original authors to prove authorship of the original contribution. In similar circumstances, it is very difficult to prove the authorship or origin of some materials that are being distributed amongst social networks, private or institutional websites or any other means through the Internet, namely documents, papers, images, data, etc. Those materials can be easily plagiarised (e.g. partially or totally translated) and redistributed without any control and with no means to prove authorship. In this context, we propose an online framework for the registration, search, interchange and trade of scholarly objects, which helps to overcome the potential drawbacks of online distribution and publishing. This framework acts as an intellectual property repository and sales point, where people is able to register content and determine the way they want to trade it, while providing innovative search capabilities based on the MPEG Query Format standard [1]. Creative Commons (CC) [2] limitations are identified and overcome by means of a licensing approach that combines Rights Expression Languages and the MPEG-21 Media Value Chain Ontology [3].

  • A MPEG-Based Architecture for Generic Distributed Multimedia Scenarios

     Carreras, Anna; Tous Liesa, Ruben; Rodriguez Luna, Eva; Delgado Mercé, Jaime; Cordara, Giovanni; Francini, Gianluca; Gibellino, Diego
    Journal of digital information management
    Date of publication: 2010-02
    Journal article

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  • A standards-based generic approach for complex multimedia management

     Carreras Coch, Anna; Tous Liesa, Ruben; Rodriguez Luna, Eva; Delgado Mercé, Jaime; Cordara, Giovanni; Francini, Gianluca; Gibellino, Diego
    Journal of digital information management
    Date of publication: 2010-02
    Journal article

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  • Use of Metadata and Context for Enriching Adaptation and Search and Retrieval in Governed Distributed Multimedia Applications

     Carreras Coch, Anna
    Defense's date: 2010-07-05
    Department of Computer Architecture, Universitat Politècnica de Catalunya
    Theses

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  • Query formats for multimedia applications ISO/IEC 15938-12 (MPEG Query Format) & ISO/IEC 24800 (JPSearch)

     Tous Liesa, Ruben
    Winter Course of the CATAI
    Presentation's date: 2009
    Presentation of work at congresses

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    Digital images are being generated, distributed and stored worldwide at an ever increasing rate. This is increasing the urgency of solving and standardizing solutions for challenging questions surrounding image repositories. Currently, almost every repository offers a different retrieval interface and image metadata description format, preventing unified and efficient access to those repositories. In this context, ISO/IEC SC29WG11 (more commonly known as MPEG) and ISO/IEC SC29WG1 (more commonly known as JPEG) have been working to create standard interfaces for media repositories. In one hand, MPEG has recently finished the ISO/IEC 15938-12 a.k.a. MPEG Query Format (MPQF), which standardizes a query language for multimedia repositories. On the other hand, JPEG is now finishing the ISO/IEC 24800, a.k.a. JPSearch, which aims on standardizing interfaces of an abstract image retrieval framework. This framework should help to decouple the in general tightly coupled systems and provide interoperability during image search among JPSearch aware repositories.

  • Access to the full text
    How MPEG Query Format enables advanced multimedia functionalities  Open access

     Carreras Coch, Anna; Tous Liesa, Ruben; Delgado Mercé, Jaime
    International Workshop of the Multimedia Metadata Community on Semantic Multimedia Database Technologies
    Presentation's date: 2009-04-02
    Presentation of work at congresses

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    In December 2008, ISO/IEC SC29WG11 (more commonly known as MPEG) published the ISO/IEC 15938-12 standard, i.e. the MPEG Query Format (MPQF), providing a uniform search&retrieval interface for multimedia repositories. While the MPQF’s coverage of basic retrieval functionalities is unequivocal, it’s suitability for advanced retrieval tasks is still under discussion. This paper analyzes how MPQF addresses four of the most relevant approaches for advanced multimedia retrieval: Query By Example (QBE), Retrieval trough Semantic Indexing, Interactive Retrieval, and Personalized and Adaptive Retrieval. The paper analyzes the contribution of MPQF in narrowing the semantic gap, and the flexibility of the standard. The paper proposes several language extensions to solve the different identified limitations. These extensions are intended to contribute to the forthcoming standardization process of the envisaged MPQF’s version 2.

    Postprint (author’s final draft)

  • GESTION DE CICLO DE VIDA DE CONTENIDOS MULTIMEDIA

     Gallego Fernandez, M. Isabel; Llorente Viejo, Silvia; Tous Liesa, Ruben; Rodriguez Doncel, Victor; Rodriguez Luna, Eva; Nin Guerrero, Jordi; Delgado Mercé, Jaime
    Participation in a competitive project

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  • A Standards-Based Generic Approach for Complex Multimedia Management

     Carreras, Anna; Tous Liesa, Ruben; Rodriguez Luna, Eva; Delgado Mercé, Jaime; Giovanni, Cordara; Gianluca, Francini; Gibellino, Diego
    9th Workshop on Multimedia Metadata
    Presentation of work at congresses

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  • A LEGO-like metadata architecture for image search & retrieval

     Tous Liesa, Ruben; Delgado Mercé, Jaime
    International Conference on Database and Expert Systems Applications
    Presentation's date: 2009
    Presentation of work at congresses

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  • Semantic MPEG query format validation and processing

     Doeller, Mario; Tous Liesa, Ruben; Gruhne, M; Choi, Miran; Lim, Tae-Beom; Delgado Mercé, Jaime; Yakou, Armelle Natacha Ndjafa
    IEEE multimedia
    Date of publication: 2009-12
    Journal article

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  • Using the MPEG Query Format for Cross-Modal Identification

     Gruhne, Matthias; Dunker, Peter; Tous Liesa, Ruben
    Journal of multimedia
    Date of publication: 2009-10
    Journal article

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  • Semantic-Driven Multimedia Retrieval with the MPEG Query Format

     Tous Liesa, Ruben; Delgado Mercé, Jaime
    Lecture notes in computer science
    Date of publication: 2008-12
    Journal article

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  • The MPEG Query Format: Unifying Access to Multimedia Retrieval Systems

     Doller, M; Tous Liesa, Ruben; Gruhne, M; Yoon, K; Sano, M; Burnett, Is
    IEEE multimedia
    Date of publication: 2008-12
    Journal article

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  • Cómo mejorar el feedback mediante una herramienta de corrección automática

     Alvarez Martinez, Carlos; Jimenez Gonzalez, Daniel; Lopez Alvarez, David; Alonso López, Javier; Tous Liesa, Ruben; Parcerisa Bundó, Joan Manuel; Barlet Ros, Pere; Fernandez Barta, Montserrat; Tubella Murgadas, Jordi; Pérez, Christian
    Jornades de Docència del Departament d'Arquitectura de Computadors
    Presentation's date: 2008-02-15
    Presentation of work at congresses

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  • Data Integration with XML and Semantic Web Technologies

     Tous Liesa, Ruben
    Date of publication: 2008-01
    Book

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  • Still Image Copy Detection Algorithm Robust to Basic Image Modifications

     Tous Liesa, Ruben
    50th International Symposium ELMAR-2008
    Presentation's date: 2008-09-10
    Presentation of work at congresses

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  • SISA-EMU: feedback automático para ensamblador

     Alvarez Martinez, Carlos; Jimenez Gonzalez, Daniel; Lopez Alvarez, David; Alonso López, Javier; Tous Liesa, Ruben; Parcerisa Bundó, Joan Manuel; Barlet Ros, Pere; Fernandez Barta, Montserrat; Tubella Murgadas, Jordi; Christian, Pérez
    Jornadas de Enseñanza Universitaria de la Informática
    Presentation of work at congresses

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  • Work in Progress-Improving Feedback Using an Automatic Assessment Tool

     Jimenez Gonzalez, Daniel; Alvarez Martinez, Carlos; Lopez Alvarez, David; Parcerisa Bundó, Joan Manuel; Alonso López, Javier; Christian, Pérez; Tous Liesa, Ruben; Barlet Ros, Pere; Fernandez Barta, Montserrat; Tubella Murgadas, Jordi
    Frontiers in Education Conference 2008
    Presentation's date: 2008-10-22
    Presentation of work at congresses

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  • Una herramienta automática de feedback para ensamblador

     Alvarez Martinez, Carlos; Jimenez Gonzalez, Daniel; Lopez Alvarez, David; Alonso López, Javier; Tous Liesa, Ruben; Parcerisa Bundó, Joan Manuel; Barlet Ros, Pere; Fernandez Barta, Montserrat; Tubella Murgadas, Jordi; Christian, Pérez
    Date: 2008-10
    Report

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  • An Architecture for TV Content Distributed Search and Retrieval Using the MPEG Query Format

     Tous Liesa, Ruben; Carreras, A; Delgado Mercé, Jaime; Cordara, G; Gianluca, F; Peig, E; Dufaux, F; Galinski, G
    1st International Workshop on Ambient Media Delivery and Interactive Television
    Presentation of work at congresses

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  • Enriching search and retrieval of multimedia information with DRM services and context-based content adaptation

     Tous Liesa, Ruben
    19th International Workshop on Database and Expert Systems Applications. DEXA 2008
    Presentation's date: 2008-09-01
    Presentation of work at congresses

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  • The MPEG Query Format, a new standard for querying digital content. Usage in scholarly literature search and retrieval

     Tous Liesa, Ruben
    ELPUB 2008. 12th International Conference on Electronic Publishing
    Presentation's date: 2008-06-25
    Presentation of work at congresses

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  • A TV Digital Assets Interchange Framework Based on Emerging Standards

     Tous Liesa, Ruben; Delgado Mercé, Jaime; Carreras, Anna; Rodriguez Luna, Eva
    ISCE 2008. 12th Annual IEEE International Symposium on Consumer Electronics
    Presentation of work at congresses

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  • Distributed Cross-Modal Search with the MPEG Query Format

     Gruhne, M; Dunker, P; Döller, M; Tous Liesa, Ruben
    9th International Workshop on Image Analysis for Multimedia Interactive Services
    Presentation of work at congresses

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  • A Search and Retrieval Framework for the management of copyrighted audiovisual content

     Tous Liesa, Ruben
    50th International Symposium ELMAR-2008
    Presentation's date: 2008-09-10
    Presentation of work at congresses

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  • Semantic-Driven Multimedia Retrieval with the MPEG Query Format

     Tous Liesa, Ruben; Delgado Mercé, Jaime
    SEMANTIC MULTIMEDIA. Third International Conference on Semantic and Digital Media Technologies.
    Presentation of work at congresses

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  • L7, an MPEG-7 Query Framework

     Delgado Mercé, Jaime; Tous Liesa, Ruben
    Third International Conference on Automated Production of Cross Media Content for Multi-Channel Distribution (AXMEDIS'07)
    Presentation's date: 2007
    Presentation of work at congresses

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  • Seguretat i Confiança en la Societat de la Informació (Segur@)

     Delgado Mercé, Jaime; Rodriguez Luna, Eva; Gallego Fernandez, M. Isabel; Tous Liesa, Ruben; Rodriguez Doncel, Victor
    Participation in a competitive project

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  • E2E RM (End to End Rights Management)

     Rodriguez Luna, Eva; Delgado Mercé, Jaime; Tous Liesa, Ruben; Llorente Viejo, Silvia
    Participation in a competitive project

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  • Computer systems science and engineering

     Tous Liesa, Ruben
    Collaboration in journals

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  • The MPEG-7 Query Format: A New Standard in Progress for Multimedia Query by Content

     Adistambha, Kevin; Doeller, Mario; Tous Liesa, Ruben; Gruhne, Matthias; Sano, Masanori; Tsinaraki, Chrisa; Christodoulakis, Stavros; Yoon, Kyoungro; H. Ritz, Christian; Burnett, Ian S.
    7th International Symposium on Communications and Information Technologies (ISICT 2007) ; First Ambient Networks Workshop on Mobility, Multi-Access and Network Management (M2NM'07)
    Presentation's date: 2007-10-16
    Presentation of work at congresses

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  • MP7QF: An MPEG-7 Query Format

     Gruhne, Matthias; Tous Liesa, Ruben; Doeller, Mario; Delgado Mercé, Jaime; Kosch, Harald
    Third International Conference on Automated Production of Cross Media Content for Multi-Channel Distribution (AXMEDIS'07)
    Presentation of work at congresses

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  • A Vector Space Model for Semantic Similarity Calculation and OWL Ontology Alignment

     Tous Liesa, Ruben; Delgado Mercé, Jaime
    Lecture notes in computer science
    Date of publication: 2006-09
    Journal article

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  • Data Integration with XML and Semantic Web Technologies

     Tous Liesa, Ruben
    Defense's date: 2006-10-04
    UPF
    Theses

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