Lambros Makris - Academia.edu (original) (raw)

Papers by Lambros Makris

Ο παγκόσμιος ιστός είναι μία σχετικά καινούργια εξέλιξη στο χώρο της Πληροφορικής επιστήμης, η οπ... more Ο παγκόσμιος ιστός είναι μία σχετικά καινούργια εξέλιξη στο χώρο της Πληροφορικής επιστήμης, η οποία βασίζεται σε πληθώρα προϋπαρχουσών αλλά και νέων τεχνολογιών. Η πολυπλοκότητα ενός πλήρους δυναμικού πληροφοριακού συστήματος είναι ιδιαίτερα μεγάλη λόγω του αριθμού των τεχνολογιών που πρέπει να ολοκληρωθούν ώστε αυτό να γίνει λειτουργικό. Το πρόβλημα μεγεθύνεται όταν είναι απαραίτητη η διασύνδεση του και με παλαιότερα συστήματα πληροφοριών (legacy systems). Εξαιτίας της ιδιαίτερης δυναμικής του χώρου έχει ήδη πραγματοποιηθεί σημαντική έρευνα η οποία περιλαμβάνει τις παραμέτρους κωδικοποίησης και των πρωτοκόλλων επικοινωνίας. Ένα σημαντικό πρόβλημα όμως το οποίο συνεχίζει να ταλανίζει την απρόσκοπτη εφαρμογή των συστημάτων αυτών είναι η ίδια η πολυπλοκότητά τους και η προσπάθεια ολοκλήρωσης που απαιτείται. Στη συνέχεια είναι επίσης απαραίτητη η καταβολή σημαντικής προσπάθειας για την διατήρηση και την ανανέωσή τους. Στόχος της παρούσας διατριβής είναι η παρουσίαση μιας ενοποιημένης ...

Proceedings of the Third International Conference on Computer Graphics Theory and Applications, 2008

The customization level of vehicles is growing in order to deal with increasing user needs. Web b... more The customization level of vehicles is growing in order to deal with increasing user needs. Web browsers are becoming the focal point of vehicle customization, forming personalized market places where users can select and preview various setups. However the state of the art for the completion of the transaction is still very much characterized by a face-to-face sales situation. Direct sales over the internet, without sales person contacts, are still a small segment of the market, of only a few percent, for European manufacturers. This paper presents an Intelligent DIY e-commerce system for vehicle design, based on 3D Visualization and Ontologies that aims at enabling a suitable representation of products with the most realistic possible visualization outcome in order to help prospective customers in their decision. The platform, designed for the vehicle sector, includes all the practicable electronic commerce variants and its on-line product configuration process is controlled by an ontology that was created using the OWL Web Ontology Language.

In this paper, the MKLab interactive video retrieval system is described. image and submitted to ... more In this paper, the MKLab interactive video retrieval system is described. image and submitted to the index structure. Subsequently, the set of resulting images is ranked using custom distance metrics between their feature vectors.

The state of the art in vehicle configuration is still very much characterized by a face-to-face ... more The state of the art in vehicle configuration is still very much characterized by a face-to-face sales situation. In addition, web browsers are becoming market places. But direct sales over the internet, without contact with a sales person constitute still a small segment of the market, of only a few percent for European manufacturers. The internet is more used as a medium to gather information. A standardised DIYD vehicle configuration is thus a must for European manufacturers today. This paper presents an Intelligent DIY e-commerce system for vehicle design, based on Ontologies and 3D Visualization, that aims at enabling a suitable representation of products with the most realistic possible visualisation outcome. The platform, designed for the automotive sector, includes all the practicable electronic commerce variants and its on-line product configuration process is controlled by an ontology, that was created using the OWL Web Ontology Language.

2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society

ABSTRACT Presents the design and implementation of a system providing personalized access of mobi... more ABSTRACT Presents the design and implementation of a system providing personalized access of mobile devices like personal digital assistants (PDA) or cellular phones to a web-based health-care system. Specifically, a web-based system was designed and implemented to support not only web-access but also mobile access through the use of the WAP protocol. Personalized access to the system is also supported in both Web and WAP based access tools. Application screenshots of the developed application are presented in the results section.

Proceedings of the international conference on Multimedia - MM '10, 2010

Content searching and downloading are the two dominant actions of the Internet users today, despi... more Content searching and downloading are the two dominant actions of the Internet users today, despite the fact that the Internet was not originally architected to serve such actions. Content Centric Networking is the new trend in the research community to build network architectures that route content by name and not by the host's network address so as to efficiently deal with content persistence, availability and authenticity issues. In this work we propose an extension to the Content Centric Network protocol in order to support content search as a native process of the network. By using object descriptors to represent the actual content objects and integrate these descriptors in the network protocol we manage to search and retrieve content from the network not only by name but also by the content itself. In this approach, searching for information is a process distributed to the reachable network. Moreover, content aggregation is handled by the end user and not by content aggregation portals, thematic content search engines or information curators. By doing so, search is not any more an application but part of the network and can pave the way for many novel applications which have never been thought until today.

Proceeding of the ACM International Conference on Image and Video Retrieval - CIVR '09, 2009

In this paper, the MKLab interactive video retrieval system is described.

Lecture Notes in Computer Science

The E-MuniS (Electronic Municipal Information Services — Best Practice Transfer and Improvement) ... more The E-MuniS (Electronic Municipal Information Services — Best Practice Transfer and Improvement) Project aims to improve the best practices of the European Union municipalities regarding the use of information technology in municipal administration working processes and services to citizens and to transfer those results to South-Eastern European municipalities in particular from the Balkan region thus integrating it to the EU municipal network. The project consortium involves as participants couples of local municipality—IT-company partnerships from EU countries and from South East European countries. Within the project solutions for an e-municipality office (as back-office system) and prototypes of e-services to citizens and business (as front-office system) will be developed and implemented.

Informatics for Health and Social Care, 1997

The maturing of telecommunication technologies has ushered in a whole new era of applications and... more The maturing of telecommunication technologies has ushered in a whole new era of applications and services in the health care environment. Teleworking, teleconsultation, mutlimedia conferencing and medical data distribution are rapidly becoming commonplace in clinical practice. As a result, a set of problems arises, concerning data confidentiality and integrity. Public computer networks, such as the emerging ISDN technology, are vulnerable to eavesdropping. Therefore it is important for telemedicine applications to employ end-to-end encryption mechanisms securing the data channel from unauthorized access of modification. We propose a network access and encryption system that is both economical and easily implemented for integration in developing or existing applications, using well-known and thoroughly tested encryption algorithms. Public-key cryptography is used for session-key exchange, while symmetric algorithms are used for bulk encryption. Mechanisms for session-key generation and exchange are also provided.

IEEE Transactions on Information Technology in Biomedicine, 1998

The present paper describes methods for the design of both synchronous and asynchronous computer-... more The present paper describes methods for the design of both synchronous and asynchronous computer-supported cooperative work (CSCW) procedures suitable for the medical application area and specifically for the purpose of medical teleconsultation and remote diagnosis support. The experimental implementation of a CSCW system built upon a PC/Windows platform is detailed as an example of a low-cost system suitable for adoption in a wide range of medical teleconsultation applications.

IEEE Communications Magazine, 2011

The recent emergence of user generated content requires new content creation tools that will be b... more The recent emergence of user generated content requires new content creation tools that will be both easy to learn and easy to use. These new tools should enable the user to construct new high-quality content with minimum effort; it is essential to allow existing multimedia content to be reused as building blocks when creating new content. In this work we present a new tool for automatically constructing virtual worlds with minimum user intervention. Users can create these worlds by drawing a simple sketch, or by using interactively segmented 2D objects from larger images. The system receives as a query the sketch or the segmented image, and uses it to find similar 3D models that are stored in a Content Centric Network. The user selects a suitable model from the retrieved models, and the system uses it to automatically construct a virtual 3D world.

This paper provides an overview of the tasks submitted to TRECVID 2009 by ITI-CERTH. ITI-CERTH pa... more This paper provides an overview of the tasks submitted to TRECVID 2009 by ITI-CERTH. ITI-CERTH participated in the high-level feature extraction task and the search task. In the high-level feature extraction task, techniques are developed that combine motion information with existing wellperforming descriptors such as SIFT and Bag-of-Words and the use of compressed video information to form a Bag-of-Words model for shot representation is studied. The search task is based on an interactive retrieval application combining retrieval functionalities in various modalities (i.e. textual, visual and concept search) with a user interface supporting interactive search over all queries submitted. Evaluation results on the submitted runs for this task provide interesting conclusions regarding the comparison of the involved retrieval functionalities as well as the strategies in interactive video search.

TREC online proceedings, Oct 27, 2008

In this paper, we give an overview of the four tasks submitted to TRECVID 2008 by COST292. The hi... more In this paper, we give an overview of the four tasks submitted to TRECVID 2008 by COST292. The high-level feature extraction framework comprises four systems. The first system transforms a set of low-level descriptors into the semantic space using Latent Semantic Analysis and utilises neural networks for feature detection. The second system uses a multi-modal classifier based on SVMs and several descriptors. The third system uses three image classifiers based on ant colony optimisation, particle swarm optimisation and ...

International Journal of Metadata, Semantics and Ontologies, 2008

This paper introduces a hybrid multimedia retrieval model that is capable of retrieving cultural ... more This paper introduces a hybrid multimedia retrieval model that is capable of retrieving cultural heritage multimedia content, based on their semantic annotation with the help of an ontology and on low level visual features with a view to finding similar content. The main novelty is the way in which these techniques cooperate transparently during the evaluation of a single query in a hybrid fashion, making recommendations to the user. A search engine has been developed implementing this model, which is capable of searching through cultural heritage multimedia collections, and indicative examples are discussed, along with insights into its performance.

This paper presents a new Web tool for converting text to Sign Language notation and correspondin... more This paper presents a new Web tool for converting text to Sign Language notation and corresponding VRML ani- mation sequences for H-anim compliant avatars. The tool can be used both as a sign language dictionary as well as a text to sign language translator. It is based on a Sign Language dictionary written in the well-known Sign- Writing system. More specifically, the entries of the dictionary are in SWML (SignWriting Markup Language), an XML-based format, which has recently been developed for the storage, indexing and processing of SignWriting notation. For sign synthesis, each sign box (basic sign) is first converted to a sequence of Body Animation Pa- rameters (BAPs) of the MPEG-4 standard corresponding to the represented gesture. These sequences, which can also be coded and/or reproduced by MPEG-4 BAP players, are then used to animate H-anim compliant VRML avatars, reproducing the exact gestures represented in sign language notation. Envisaged applications include the developme...

Encyclopedia of Multimedia, 2008

International Journal of Metadata, Semantics and Ontologies, 2008

Nowadays, an increasingly growing demand for advanced multimedia search engines is arising, as hu... more Nowadays, an increasingly growing demand for advanced multimedia search engines is arising, as huge amounts of digital visual content are becoming available. The contribution of this paper is the introduction of a hybrid multimedia retrieval model accompanied by the presentation of a search engine that is capable of retrieving visual content from cultural heritage multimedia libraries as in three modes: (i) based on their semantic annotation with the help of an ontology; (ii) based on the visual features with a view to finding similar content; and (iii) based on the combination of these two strategies in order to produce recommendations. To achieve this, the retrieval model is composed of two different parts, a low-level visual feature analysis and retrieval and a high-level ontology infrastructure. The main novelty is the way in which these two co-operate transparently during the evaluation of a single query in a hybrid fashion, making recommendations to the user and retrieving content that is both visually and semantically similar. A search engine has been developed implementing this model which is capable of searching through digital libraries of cultural heritage collections, and indicative examples are discussed, along with insights into its performance.

Ο παγκόσμιος ιστός είναι μία σχετικά καινούργια εξέλιξη στο χώρο της Πληροφορικής επιστήμης, η οπ... more Ο παγκόσμιος ιστός είναι μία σχετικά καινούργια εξέλιξη στο χώρο της Πληροφορικής επιστήμης, η οποία βασίζεται σε πληθώρα προϋπαρχουσών αλλά και νέων τεχνολογιών. Η πολυπλοκότητα ενός πλήρους δυναμικού πληροφοριακού συστήματος είναι ιδιαίτερα μεγάλη λόγω του αριθμού των τεχνολογιών που πρέπει να ολοκληρωθούν ώστε αυτό να γίνει λειτουργικό. Το πρόβλημα μεγεθύνεται όταν είναι απαραίτητη η διασύνδεση του και με παλαιότερα συστήματα πληροφοριών (legacy systems). Εξαιτίας της ιδιαίτερης δυναμικής του χώρου έχει ήδη πραγματοποιηθεί σημαντική έρευνα η οποία περιλαμβάνει τις παραμέτρους κωδικοποίησης και των πρωτοκόλλων επικοινωνίας. Ένα σημαντικό πρόβλημα όμως το οποίο συνεχίζει να ταλανίζει την απρόσκοπτη εφαρμογή των συστημάτων αυτών είναι η ίδια η πολυπλοκότητά τους και η προσπάθεια ολοκλήρωσης που απαιτείται. Στη συνέχεια είναι επίσης απαραίτητη η καταβολή σημαντικής προσπάθειας για την διατήρηση και την ανανέωσή τους. Στόχος της παρούσας διατριβής είναι η παρουσίαση μιας ενοποιημένης ...

Proceedings of the Third International Conference on Computer Graphics Theory and Applications, 2008

The customization level of vehicles is growing in order to deal with increasing user needs. Web b... more The customization level of vehicles is growing in order to deal with increasing user needs. Web browsers are becoming the focal point of vehicle customization, forming personalized market places where users can select and preview various setups. However the state of the art for the completion of the transaction is still very much characterized by a face-to-face sales situation. Direct sales over the internet, without sales person contacts, are still a small segment of the market, of only a few percent, for European manufacturers. This paper presents an Intelligent DIY e-commerce system for vehicle design, based on 3D Visualization and Ontologies that aims at enabling a suitable representation of products with the most realistic possible visualization outcome in order to help prospective customers in their decision. The platform, designed for the vehicle sector, includes all the practicable electronic commerce variants and its on-line product configuration process is controlled by an ontology that was created using the OWL Web Ontology Language.

In this paper, the MKLab interactive video retrieval system is described. image and submitted to ... more In this paper, the MKLab interactive video retrieval system is described. image and submitted to the index structure. Subsequently, the set of resulting images is ranked using custom distance metrics between their feature vectors.

The state of the art in vehicle configuration is still very much characterized by a face-to-face ... more The state of the art in vehicle configuration is still very much characterized by a face-to-face sales situation. In addition, web browsers are becoming market places. But direct sales over the internet, without contact with a sales person constitute still a small segment of the market, of only a few percent for European manufacturers. The internet is more used as a medium to gather information. A standardised DIYD vehicle configuration is thus a must for European manufacturers today. This paper presents an Intelligent DIY e-commerce system for vehicle design, based on Ontologies and 3D Visualization, that aims at enabling a suitable representation of products with the most realistic possible visualisation outcome. The platform, designed for the automotive sector, includes all the practicable electronic commerce variants and its on-line product configuration process is controlled by an ontology, that was created using the OWL Web Ontology Language.

2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society

ABSTRACT Presents the design and implementation of a system providing personalized access of mobi... more ABSTRACT Presents the design and implementation of a system providing personalized access of mobile devices like personal digital assistants (PDA) or cellular phones to a web-based health-care system. Specifically, a web-based system was designed and implemented to support not only web-access but also mobile access through the use of the WAP protocol. Personalized access to the system is also supported in both Web and WAP based access tools. Application screenshots of the developed application are presented in the results section.

Proceedings of the international conference on Multimedia - MM '10, 2010

Content searching and downloading are the two dominant actions of the Internet users today, despi... more Content searching and downloading are the two dominant actions of the Internet users today, despite the fact that the Internet was not originally architected to serve such actions. Content Centric Networking is the new trend in the research community to build network architectures that route content by name and not by the host's network address so as to efficiently deal with content persistence, availability and authenticity issues. In this work we propose an extension to the Content Centric Network protocol in order to support content search as a native process of the network. By using object descriptors to represent the actual content objects and integrate these descriptors in the network protocol we manage to search and retrieve content from the network not only by name but also by the content itself. In this approach, searching for information is a process distributed to the reachable network. Moreover, content aggregation is handled by the end user and not by content aggregation portals, thematic content search engines or information curators. By doing so, search is not any more an application but part of the network and can pave the way for many novel applications which have never been thought until today.

Proceeding of the ACM International Conference on Image and Video Retrieval - CIVR '09, 2009

In this paper, the MKLab interactive video retrieval system is described.

Lecture Notes in Computer Science

The E-MuniS (Electronic Municipal Information Services — Best Practice Transfer and Improvement) ... more The E-MuniS (Electronic Municipal Information Services — Best Practice Transfer and Improvement) Project aims to improve the best practices of the European Union municipalities regarding the use of information technology in municipal administration working processes and services to citizens and to transfer those results to South-Eastern European municipalities in particular from the Balkan region thus integrating it to the EU municipal network. The project consortium involves as participants couples of local municipality—IT-company partnerships from EU countries and from South East European countries. Within the project solutions for an e-municipality office (as back-office system) and prototypes of e-services to citizens and business (as front-office system) will be developed and implemented.

Informatics for Health and Social Care, 1997

The maturing of telecommunication technologies has ushered in a whole new era of applications and... more The maturing of telecommunication technologies has ushered in a whole new era of applications and services in the health care environment. Teleworking, teleconsultation, mutlimedia conferencing and medical data distribution are rapidly becoming commonplace in clinical practice. As a result, a set of problems arises, concerning data confidentiality and integrity. Public computer networks, such as the emerging ISDN technology, are vulnerable to eavesdropping. Therefore it is important for telemedicine applications to employ end-to-end encryption mechanisms securing the data channel from unauthorized access of modification. We propose a network access and encryption system that is both economical and easily implemented for integration in developing or existing applications, using well-known and thoroughly tested encryption algorithms. Public-key cryptography is used for session-key exchange, while symmetric algorithms are used for bulk encryption. Mechanisms for session-key generation and exchange are also provided.

IEEE Transactions on Information Technology in Biomedicine, 1998

The present paper describes methods for the design of both synchronous and asynchronous computer-... more The present paper describes methods for the design of both synchronous and asynchronous computer-supported cooperative work (CSCW) procedures suitable for the medical application area and specifically for the purpose of medical teleconsultation and remote diagnosis support. The experimental implementation of a CSCW system built upon a PC/Windows platform is detailed as an example of a low-cost system suitable for adoption in a wide range of medical teleconsultation applications.

IEEE Communications Magazine, 2011

The recent emergence of user generated content requires new content creation tools that will be b... more The recent emergence of user generated content requires new content creation tools that will be both easy to learn and easy to use. These new tools should enable the user to construct new high-quality content with minimum effort; it is essential to allow existing multimedia content to be reused as building blocks when creating new content. In this work we present a new tool for automatically constructing virtual worlds with minimum user intervention. Users can create these worlds by drawing a simple sketch, or by using interactively segmented 2D objects from larger images. The system receives as a query the sketch or the segmented image, and uses it to find similar 3D models that are stored in a Content Centric Network. The user selects a suitable model from the retrieved models, and the system uses it to automatically construct a virtual 3D world.

This paper provides an overview of the tasks submitted to TRECVID 2009 by ITI-CERTH. ITI-CERTH pa... more This paper provides an overview of the tasks submitted to TRECVID 2009 by ITI-CERTH. ITI-CERTH participated in the high-level feature extraction task and the search task. In the high-level feature extraction task, techniques are developed that combine motion information with existing wellperforming descriptors such as SIFT and Bag-of-Words and the use of compressed video information to form a Bag-of-Words model for shot representation is studied. The search task is based on an interactive retrieval application combining retrieval functionalities in various modalities (i.e. textual, visual and concept search) with a user interface supporting interactive search over all queries submitted. Evaluation results on the submitted runs for this task provide interesting conclusions regarding the comparison of the involved retrieval functionalities as well as the strategies in interactive video search.

TREC online proceedings, Oct 27, 2008

In this paper, we give an overview of the four tasks submitted to TRECVID 2008 by COST292. The hi... more In this paper, we give an overview of the four tasks submitted to TRECVID 2008 by COST292. The high-level feature extraction framework comprises four systems. The first system transforms a set of low-level descriptors into the semantic space using Latent Semantic Analysis and utilises neural networks for feature detection. The second system uses a multi-modal classifier based on SVMs and several descriptors. The third system uses three image classifiers based on ant colony optimisation, particle swarm optimisation and ...

International Journal of Metadata, Semantics and Ontologies, 2008

This paper introduces a hybrid multimedia retrieval model that is capable of retrieving cultural ... more This paper introduces a hybrid multimedia retrieval model that is capable of retrieving cultural heritage multimedia content, based on their semantic annotation with the help of an ontology and on low level visual features with a view to finding similar content. The main novelty is the way in which these techniques cooperate transparently during the evaluation of a single query in a hybrid fashion, making recommendations to the user. A search engine has been developed implementing this model, which is capable of searching through cultural heritage multimedia collections, and indicative examples are discussed, along with insights into its performance.

This paper presents a new Web tool for converting text to Sign Language notation and correspondin... more This paper presents a new Web tool for converting text to Sign Language notation and corresponding VRML ani- mation sequences for H-anim compliant avatars. The tool can be used both as a sign language dictionary as well as a text to sign language translator. It is based on a Sign Language dictionary written in the well-known Sign- Writing system. More specifically, the entries of the dictionary are in SWML (SignWriting Markup Language), an XML-based format, which has recently been developed for the storage, indexing and processing of SignWriting notation. For sign synthesis, each sign box (basic sign) is first converted to a sequence of Body Animation Pa- rameters (BAPs) of the MPEG-4 standard corresponding to the represented gesture. These sequences, which can also be coded and/or reproduced by MPEG-4 BAP players, are then used to animate H-anim compliant VRML avatars, reproducing the exact gestures represented in sign language notation. Envisaged applications include the developme...

Encyclopedia of Multimedia, 2008

International Journal of Metadata, Semantics and Ontologies, 2008

Nowadays, an increasingly growing demand for advanced multimedia search engines is arising, as hu... more Nowadays, an increasingly growing demand for advanced multimedia search engines is arising, as huge amounts of digital visual content are becoming available. The contribution of this paper is the introduction of a hybrid multimedia retrieval model accompanied by the presentation of a search engine that is capable of retrieving visual content from cultural heritage multimedia libraries as in three modes: (i) based on their semantic annotation with the help of an ontology; (ii) based on the visual features with a view to finding similar content; and (iii) based on the combination of these two strategies in order to produce recommendations. To achieve this, the retrieval model is composed of two different parts, a low-level visual feature analysis and retrieval and a high-level ontology infrastructure. The main novelty is the way in which these two co-operate transparently during the evaluation of a single query in a hybrid fashion, making recommendations to the user and retrieving content that is both visually and semantically similar. A search engine has been developed implementing this model which is capable of searching through digital libraries of cultural heritage collections, and indicative examples are discussed, along with insights into its performance.