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San Sebastián de los Reyes, Spain

Llaria A.,ESTIA | Terrasson G.,ESTIA | Arregui H.,Vicomtech | Hacala A.,ESTIA
Proceedings of the IEEE International Conference on Industrial Technology | Year: 2015

Nowadays, interconnected ubiquitous objects are more and more present in different applications as a technical solution to collect, every time and everywhere, great amounts of data which are accessible through the Internet. One interesting area of application is the monitoring of cattle, in order not only to improve the farming working conditions but also to better know the behavior of the animals. In this work, a geolocation and monitoring platform oriented to extensive farming in mountain environments is presented. The proposed solution is composed of low power long range communication geolocation devices and a dedicated interface, accessible by means of different portable devices, which allows users to access and study the collected data. © 2015 IEEE.

Marcos G.,Vicomtech | Illarramendi A.,University of the Basque Country | Olaizola I.G.,Vicomtech | Florez J.,Vicomtech
Multimedia Systems | Year: 2011

Nowadays the retrieval of multimedia assets is mainly performed by text-based retrieval systems with powerful and stable indexing mechanisms. Migration from those systems to content-aware multimedia retrieval systems is a common aim for companies from very diverse sectors. In this paper we present a semantic middleware designed to achieve a seamless integration with existing systems. This middleware outsources the semantic functionalities (e.g. knowledge extraction, semantic query expansion,⋯) that are not covered by traditional systems, thereby allowing the use of complementary content-based techniques. We include a list of key criteria to successfully deploy this middleware, which provides semantic support to many different steps of the retrieval process. Both the middleware and the design criteria are validated by two real complementary deployments in two very different industrial domains. © 2010 Springer-Verlag.

Olaizola I.G.,Vicomtech | Quartulli M.,Vicomtech | Florez J.,Vicomtech | Sierra B.,University of the Basque Country
IEEE Transactions on Multimedia | Year: 2014

Context categorization is a fundamental pre-requisite for multi-domain multimedia content analysis applications. Most feature extraction methods require prior knowledge to decide if they are suitable for a specific domain and to optimize their input parameters. In this paper, we introduce a new color image context categorization method (DITEC) based on the trace transform. The problem of dimensionality reduction of the obtained trace transform signal is addressed through statistical descriptors of its frequency representation that keep the underlying information. We also analyze the distortions produced by the parameters that determine the sampling of the discrete trace transform. Moreover, Feature Subset Selection (FSS) is applied to both, improve the classification performance and compact the final length of the descriptor that will be provided to the classifier. These extracted features offer a highly discriminant behavior for content categorization without prior knowledge requirements. The method has been experimentally validated through two different datasets. © 2014 IEEE.

Garcia A.,Vicomtech | Arbelaitz O.,University of the Basque Country | Vansteenwegen P.,Catholic University of Leuven | Souffriau W.,Catholic University of Leuven | Linaza M.T.,Vicomtech
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

The Time Dependent Orienteering Problem with Time Windows (TDOPTW) consists of a set of locations with associated time windows and scores. Visiting a location allows to collect its score as a reward. Traveling time between locations varies depending on the leave time. The objective is to obtain a route that maximizes the obtained score within a limited amount of time. In this paper we target the use of public transportation in a city, where users may move on foot or by public transportation. The approach can also be applied to the logistic sector, for example to the multimodal freight transportation. We apply an hybrid approach to tackle the problem. Experimental results for the city of San Sebastian show we are able to obtain valid routes in real-time. © 2010 Springer-Verlag.

Garcia A.,Vicomtech | Vansteenwegen P.,Ghent University | Arbelaitz O.,University of the Basque Country | Souffriau W.,Catholic University of Leuven | Linaza M.T.,Vicomtech
Computers and Operations Research | Year: 2013

Personalised electronic tourist guides (PETs) are mobile hand-held devices able to create tourist routes matching tourists' preferences. Transportation information has been identified as one of the most appreciated functionalities of a PET. We model the tourist planning problem, integrating public transportation, as the time-dependent team orienteering problem with time windows (TD-TOPTW) in order to allow PETs to create personalised tourist routes in real-time. We develop and compare two different approaches to solve the TD-TOPTW. Experimental results for the city of San Sebastian show that both approaches are able to obtain routes in real-time. © 2011 Elsevier Ltd.

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