Browsing School of Information Sciences by Title

Now showing items 71-90 of 162

  • Hybrid scheme for fast and accurate image retrieval based on color descriptors 

    Chatzichristofis, Savvas A.; Boutalis, Yiannis (ACTA Press, Canada, 2007)
    This paper proposes a new image retrieval system, thatuses only color features and it's based on a hybrid scheme which combines crisp and fuzzy techniques, in order to retrieve color based similar images. The system ...

  • Identification and Retrieval of DNA Genomes Using Binary Image Representations Produced by Cellular Automata 

    Konstantinidis, K.; Amanatiadis, A.; Chatzichristofis, Savvas A.; Sandaltzopoulos, R.; Sirakoulis, G. Ch. (IEEE (Computer Society), 2014)
    We have developed a novel method for the identification and retrieval of DNA sequences which are represented as binary images. This type of representation emanates from the evolution of one-dimensional nucleotide arrays ...

  • 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 ...

  • Image Encryption using the Recursive Attributes of the eXclusive-OR Filter 

    Chatzichristofis, Savvas A.; Marques, Oge; Lux, Mathias; Boutalis, Yiannis (Springer, 2014)
    This paper describes a visual multimedia content encryption approach based on cellular automata (CA), expanding the work proposed in [4]. The presented algorithm relies on an attribute of the eXclusive-OR (XOR) filter, ...

  • 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 ...

  • img(Anaktisi): A Web Content Based Image Retrieval System 

    Zagoris, Konstantinos; Chatzichristofis, Savvas A. (IEEE, 2009)
    img(Anaktisi) is a C#/.NET content base image retrieval application suitable for the web. It provides efficient retrieval services for various image databases using as a query a sample image, an image sketched by the ...

  • Img(Rummager): An Interactive Content Based Image Retrieval System 

    Chatzichristofis, Savvas A.; Boutalis, Yiannis; Lux, Mathias (IEEE (Institute of Electrical and Electronics Engineers , United States), 2009)
    This paper presents an image retrieval suite called img(Rummager) which brings into effect a number of new as well as state of the art descriptors. The application can execute an image search based on a query image, either ...

  • 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 ...

  • Integrating Medical Scientific Knowledge with the Semantically Quantified Self 

    Third, Allan; Gkotsis, George; Kaldoudi, Eleni; Drosatos, George; Portokallidis, Nick; Roumeliotis, Stefanos; Domingue, John (International Semantic Web Conference, 2016-09-23)
    The assessment of risk in medicine is a crucial task, and depends on scientific knowledge derived by systematic clinical studies on factors affecting health, as well as on particular knowledge about the current status of ...

  • Inter-Mobility Support in Controlled 6LoWPAN Networks 

    Zinonos, Zinon; Vassiliou, Vasos (IEEE, 2011)
    The research and industrial community started to think of more complex application scenarios for wireless sensor networks, where the use of mobile sensor nodes is essential. The support of mobile sensor nodes in such ...

  • Investigate via internet the personal values in life and how determine the consumer's environmental behavior 

    Oikonomou, Stefanos; Drosatos, George; Papadopoulos, Theocharis; Oikonomou, Maria (2009-10)
    Everyday the following question is posed: Are businesses more successful when they adapt green strategies in producing and marketing their products?. To address this issue, we should investigate to what determines the ...

  • Investigating the Behavior of Compact Composite Descriptors in Early Fusion, Late Fusion and Distributed Image Retrieval 

    Chatzichristofis, Savvas A.; Arampatzis, Avi; Boutalis, Yiannis S. (2010)
    In Content-Based Image Retrieval (CBIR) systems, the visual content of the images is mapped into a new space named the feature space. The features that are chosen must be discriminative and sufficient for the description ...

  • “IoT Device Firmware Update over LoRa: The Blockchain Solution” 

    Anastasiou, A.; Christodoulou, Panayiotis; Christodoulou, Klitos; Vassiliou, V.; Zinonos, Zinon (IEEE, 2020-06-17)
    More and more Internet of Things (IoT) devicesare deployed around the world, due to the convenience andextra functionality they enable. This growth, while great forthe industry as a whole, has ...

  • Known Unknowns in an Era of Technological and ViralDisruptions—Implications for Theory,Policy, and Practice 

    Carayannis, Elias G.; Christodoulou, Klitos; Christodoulou, Panayiotis; Chatzichristofis, Savvas A.; Zinonos, Zinon (Springer Verlag, 2021-02-10)
    Technology is composed of the words “Techne” and “Logos” that refer to the artistic/ creative and the logical/scientific aspects of its dualism. And so inherent this Promethean concept lie the concepts of the Schumpeterian ...

  • Late fusion of compact composite descriptors for retrieval from heterogeneous image databases 

    Chatzichristofis, Savvas A.; Arampatzis, Avi (Association for Computing Machinery (ACM), United States, 2010)
    Compact composite descriptors (CCDs) are global image features, capturing more than one types of information at the same time in a very compact representation. Their quality has so far been evaluated in retrieval from ...

  • Linear-testable and C-testable Nx~x Ny~ modified Booth multipliers 

    Gizopoulos, Dimitris; Paschalis, A.; Nikolos, D. (Institution of Engineering and Technology (IET), 1996)
    The testability of modified Booth multipliers is examined with respect to the cell fault model, an implementation-independent fault model. This is especially useful in design environments where the cell realisations are ...

  • LIRe: Lucene Image Retrieval - An Extensible Java CBIR Library 

    Lux, Mathias; Chatzichristofis, Savvas A. (Association for Computing Machinery (ACM), United States, 2008)
    LIRe (Lucene Image Retrieval) is a light weight open source Java library for content based image retrieval. It provides common and state of the art global image features and offers means for indexing and retrieval. Due ...

  • Localized Global Descriptors for Image Retrieval: An Extensive Evaluation on Adaptations to the Simple Model 

    Anagnostopoulos, Nektarios; Iakovidou, Chrysanthi; Chatzichristofis, Savvas A.; Boutalis, Yiannis; Lux, Mathias (IEEE (Computer Society), 2016)
    SIMPLE (Searching Images with MPEG-7 (& MPEG-7-like) Powered Localized dEscriptors) is a model that proposes the reuse of well-established global descriptors by localizing their description mechanism on image patches located ...

  • Localizing global descriptors for content-based image retrieval 

    Iakovidou, Chryssanthi; Anagnostopoulos, Nektarios; Kapoutsis, Athanasios; Boutalis, Yiannis; Lux, Mathias; Chatzichristofis, Savvas A. (Springer, 2015)
    In this paper, we explore, extend and simplify the localization of the description ability of the well-established MPEG-7 (Scalable Colour Descriptor (SCD), Colour Layout Descriptor (CLD) and Edge Histogram Descriptor ...

  • 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 ...