Browsing Articles by Issue Date

Now showing items 41-60 of 69

  • What, Where and How? Introducing pose manifolds for industrial object manipulation 

    Kouskouridas, R.; Amanatiadis, A.; Chatzichristofis, Savvas A.; Gasteratos, A. (Elsevier, 2015)
    In this paper we propose a novel method for object grasping that aims to unify robot vision techniques for 24 efficiently accomplishing the demanding task of autonomous object manipulation. Through ontological 25 concepts, ...

  • Image Moment Invariants as Local Features for Content Based Image Retrieval using the Bag-of-Visual-Words Model 

    Karakasis, Evangelos G.; Amanatiadis, Angelos; Gasteratos, Antonios; Chatzichristofis, Savvas A. (Elsevier, 2015)
    This paper presents an image retrieval framework that uses affine image moment invariants as descriptors of local image areas. Detailed feature vectors are generated by feeding the produced moments into a Bag-of-Visual-Words ...

  • Versatile Query Scrambling for Private Web Search 

    Arampatzis, Avi; Drosatos, George; Efraimidis, Pavlos S. (Springer Link, 2015-05-16)
    We consider the problem of privacy leaks suffered by Internet users when they perform web searches, and propose a framework to mitigate them. In brief, given a ‘sensitive’ search query, the objective of our work is to ...

  • Real-time adaptive multi-robot exploration with application to underwater map construction 

    Kapoutsis, Athanasios Ch.; Chatzichristofis, Savvas A.; Doitsidis, Lefteris; Borges de Sousa, João; Pinto, Jose; Braga, Jose; Kosmatopoulos, Elias B. (Springer, 2016)
    This paper deals with the problem of autonomous exploration of unknown areas using teams of Autonomous X Vehicles (AXVs)—with X standing for Aerial, Underwater or Sea-surface—where the AXVs have to autonomously navigate ...

  • A Novel Image Retrieval Based on Visual Words Integration of SIFT and SURF 

    Ali, Nouman; Bajwa, Khalid Bashir; Sablatnig, Robert; Chatzichristofis, Savvas A.; Iqbal, Zeshan; Rashid, Muhammad; Habib, Hafiz Adnan (2016)
    With the recent evolution of technology, the number of image archives has increased exponentially. In Content-Based Image Retrieval (CBIR), high-level visual information is represented in the form of low-level features. ...

  • A Privacy-by-Design Contextual Suggestion System for Tourism 

    Efraimidis, Pavlos S.; Drosatos, George; Arampatzis, Avi; Stamatelatos, Giorgos; Athanasiadis, Ioannis N. (MDPI, 2016-05-05)
    We focus on personal data generated by the sensors and through the everyday usage of smart devices and take advantage of these data to build a non-invasive contextual suggestion system for tourism. The system, which we ...

  • DARP: Divide Areas Algorithm for Optimal Multi-Robot Coverage Path Planning 

    Kapoutsis, Athanasios Ch.; Chatzichristofis, Savvas A.; Kosmatopoulos, Elias B. (Springer, 2017)
    This paper deals with the path planning problem of a team of mobile robots, in order to cover an area of interest, with prior-defined obstacles. For the single robot case, also known as single robot coverage path planning ...

  • A Real-time Targeted Recommender System for Supermarkets 

    Christodoulou, Panayiotis; Christodoulou, Klitos; Andreou, Andreas S. (SciTePress-Publication, 2017)
    Supermarket customers find it difficult to choose from a large variety of products or be informed for the latest offers that exist in a store based on the items that they need or wish to purchase. This paper presents a ...

  • Euroscepticism and Nationalist Populism 

    Klapsis, Antonis; Kakolyris, Panagiotis (Wilfried Martens Centre for European Studies, 2017)
    In recent years Eurosceptic parties have gained significant ground in national and European Parliament elections in many EU countries. This trend is related to the effects of the ongoing economic crisis, which has drastically ...

  • Privacy-Enhanced Television Audience Measurements 

    Drosatos, George; Tasidou, Aimilia; Efraimidis, Pavlos S. (2017-02)
    Internet-enabled television systems (SmartTVs) are a development that introduces these devices into the interconnected environment of the Internet of Things. We propose a privacy-preserving application for computing ...

  • Remote monitoring of the Bactrocera oleae (Gmelin) (Diptera: Tephritidae) population using an automated McPhail trap 

    Doitsidis, Lefteris; Fouskitakis, George N.; Varikou, Kyriaki N.; Rigakis, Iraklis I.; Chatzichristofis, Savvas A.; Papafilippaki, Androniki K.; Birouraki, Athanasia E. (Elsevier, 2017-05)
    Remote pest population monitoring is of major importance within the context of precision agriculture. Information acquired from the field has been proved essential for proper decision making and pest management against ...

  • A LoCATe‐based visual place recognition system for mobile robotics and GPGPUs 

    Bampis, Loukas; Chatzichristofis, Savvas A.; Iakovidou, Chryssanthi; Gasteratos, Antonios; Boutalis, Yiannis; Amanatiadis, Angelos (John Wiley & Sons Ltd, 2017-05)
    In this paper, a novel visual Place Recognition approach is evaluated based on a visual vocabulary of the Color and Edge Directivity Descriptor (CEDD) to address the loop closure detection task. Even though CEDD was initially ...

  • Integrated visualisation of wearable sensor data and risk models for individualised health monitoring and risk assessment to promote patient empowerment 

    Zhao, Youbing; Parvinzamir, Farzad; Wilson, Stephen; Wei, Hui; Deng, Zhikun; Portokallidis, Nick; Third, Allan; Drosatos, George; Liu, Enjie; Dong, Feng; Marozas, Vaidotas; Lukosevicius, Arunas; Kaldoudi, Eleni; Clapworthy, Gordon (Springer Link, 2017-05)
    Patient empowerment delivers health and social care services that enable people to gain more control of their healthcare needs. With the advancement of sensor technologies, it is increasingly possible to monitor people’s ...

  • CoMo: A Compact Composite Moment-Based Descriptor for Image Retrieval 

    Vassou, Sotiris A.; Anagnostopoulos, Nektarios; Amanatiadis, Angelos; Christodoulou, Klitos; Chatzichristofis, Savvas A. (ACM, 2017-06-19)
    Low level features play a vital role in image retrieval. Image moments can effectively represent global information of image content while being invariant under translation, rotation, and scaling. This paper briefly presents ...

  • CoMo: a scale and rotation invariant compact composite moment-based descriptor for image retrieval 

    Vassou, S. A.; Anagnostopoulos, N.; Amanatiadis, A.; Chatzichristofis, Savvas A.; Christodoulou, Klitos (Springer International Publishing, 2018-03-01)
    Low level features play a significant role in image retrieval. Image moments can effectively represent global information of image content while being invariant under translation, rotation, and scaling. This paper presents ...

  • Image classification by addition of spatial information based on histograms of orthogonal vectors 

    Zafar, Bushra; Ashraf, Rehan; Ali, Nouman; Ahmed, Mudassar; Jabbar, Sohail; Chatzichristofis, Savvas A. (PLOS ONE, 2018-06-08)
    The Bag-of-Visual-Words (BoVW) model is widely used for image classification, object recognition and image retrieval problems. In BoVW model, the local features are quantized and 2-D image space is represented in the form ...

  • A Blockchain-Based Notarization Service for Biomedical Knowledge Retrieval 

    Kleinaki, Athina-Styliani; Mytis-Gkometh, Petros; Drosatos, George; Efraimidis, Pavlos S.; Kaldoudi, Eleni (Elsevier Ltd., 2018-08)
    Biomedical research and clinical decision depend increasingly on scientific evidence realized by a number of au-thoritative databases, mostly public and continually enriched via peer scientific contributions. Given the ...

  • Randomblocks: A transparent, verifiable blockchain-based system for random numbers 

    Christodoulou, Klitos; Chatzichristofis, Savvas A.; Sirakoulis, Georgios Ch.; Christodoulou, Panayiotis (Old City Publishing, Inc, 2019)
    Games-of-chance require high-levels of trust between participants that is often uncertain and difficult to enforce. The unique characteristics introduced by the blockchain technology can be leveraged to inform a verifiable ...

  • Composite description based on Salient Contours and Color information for CBIR tasks 

    Iakovidou, C.; Anagnostopoulos, N.; Lux, M.; Christodoulou, Klitos; Boutalis, Y.; Chatzichristofis, Savvas A. (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    This paper introduces a novel image descriptor for content based image retrieval tasks that integrates contour and color information into a compact vector. Loosely inspired by the human visual system and its mechanisms in ...

  • Blockchain Applications in the Biomedical Domain: A Scoping Review 

    Drosatos, George; Kaldoudi, Eleni (Computational and Structural Biotechnology Journal, 2019)
    Blockchain is a distributed, immutable ledger technology introduced as the enabling mechanism to support cryptocurrencies. Blockchain solutions are currently being proposed to address diverse problems in different domains. ...