Browsing Conference papers by Title

Now showing items 16-35 of 40

  • Generalized setting equations for the memory elements of sequential machines. Self-independence criteria. 

    Philokyprou, G.; Gaitanis, N. (Informatica, 1976)
    This paper is concerned with formal derivation of generalized setting (excitation) equations of the flip-flop memory elements of a sequential machine. The equations are expressed in terms of four normalized transition ...

  • Golden Retriever - A Java Based Open Source Image Retrieval Engine 

    Tsochatzidis, Lazaros T.; Iakovidou, Chrysanthi; Chatzichristofis, Savvas A.; Boutalis, Yiannis (ACM, 2013)
    Golden Retriever Image Retrieval Engine (GRire) is an open source light weight Java library developed for Content Based Image Retrieval (CBIR) tasks, employing the Bag of Visual Words (BOVW) model. It provides a complete ...

  • 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 ...

  • 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 ...

  • 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 ...

  • 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 ...

  • 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 ...

  • Mobility in WSNs for Critical Applications 

    Silva, Ricardo; Zinonos, Zinon; Sá Silva, Jorge; Vassiliou, Vasos (IEEE, 2011)
    Recent critical application sectors of sensor networks like military, health care, and industry require the use of mobile sensor nodes, something that poses unique challenges in aspects like handoff delay, packet loss, and ...

  • Multimedia Search with Noisy Modalities: Fusion and Multistage Retrieval 

    Arampatzis, Avi; Chatzichristofis, Savvas A.; Zagoris, Konstantinos (ImageClef, Wikipedia Retrieval Task, 2010)
    We report our experiences from participating to the controlled experiment of the ImageCLEF 2010 Wikipedia Retrieval task. We built an experimental search engine which combines multilingual and multi-image search, employing ...

  • The NOPTILUS project overview: A fully-autonomous navigation system of teams of AUVs for static/dynamic underwater map construction 

    Kapoutsis, A. Ch.; Salavasidis, G. V.; Chatzichristofis, Savvas A.; Braga, J.; Pinto, J.; Borges de Sousa, Joao; Kosmatopoulos, E. B. (IFAC (International Federation of Automatic Control), 2015)
    Within the project NOPTILUS, a fully functional system/methodology had been developed that allows the cooperative, fully-autonomous navigation of teams of AUVs when deployed in Static or Dynamic Underwater Map Construction ...

  • Performance Study of the Most Commonly Used Image Retrieval Evaluation Methods 

    Chatzichristofis, Savvas A.; Boutalis, Yiannis (ACTA PRESS, 2010)
    One of the most significant problems in the field of image retrieval results from the lack of a common test bed for the evaluation of the systems. So far, many of the methods used in the field of information retrieval ...

  • Quantifying integration quality using feedback on mapping results 

    Serrano, Fernando R. S.; Fernandes, Alvaro A. A.; Christodoulou, Klitos (iiWAS2017, 2017)
    Traditional data integration delivers high integration quality but requires significant upfront effort because of the need for expensive experts to be involved. The pay-as-you-go approach to data integration aims to reduce ...

  • Searching Images with MPEG-7 (& MPEG-7-like) Powered Localized dEscriptors: The SIMPLE answer to effective Content Based Image Retrieval 

    Iakovidou, Chrysanthi; Anagnostopoulos, Nektarios; Kapoutsis, Athanasios Ch.; Boutalis, Yiannis (IEEE (Computer Society), 2014)
    In this paper we propose and evaluate a new technique that localizes the description ability of the well established MPEG-7 and MPEG-7-like global descriptors. We employ the SURF detector to define salient image patches ...

  • Selection of the Proper Compact Composite Descriptor for Improving Content based Image Retrieval 

    Chatzichristofis, Savvas A.; Boutalis, Yiannis; Lux, Mathias (ACTA Press, Canada, 2009)
    Compact Composite Descriptors (CCD) are global image features capturing both, color and texture characteristics, at the same time in a very compact representation. In this paper we propose a combination of two recently ...

  • SFly: Swarm of Micro Flying Robots 

    Achtelik, Markus; Achtelik, Michael; Brunet, Yorick; Chli, Margarita; Chatzichristofis, Savvas A. (IEEE (Computer Society), 2012)
    The SFly project is an EU-funded project, with the goal to create a swarm of autonomous vision controlled micro aerial vehicles. The mission in mind is that a swarm of MAV’s autonomously maps out an unknown environmen ...

  • SPCD - SPATIAL COLOR DISTRIBUTION DESCRIPTOR - A Fuzzy Rule based Compact Composite Descriptor Appropriate for Hand Drawn Color Sketches Retrieval 

    Chatzichristofis, Savvas A.; Boutalis, Yiannis; Lux, Mathias (SCITEPRESS, 2010)
    In this paper, a new low level feature suitable for Hand Drawn Color Sketches retrieval is presented. The proposed feature structure combines color and spatial color distribution information. The combination of these two ...

  • The TREC files: the (ground) truth is out there 

    Chatzichristofis, Savvas A.; Zagoris, Konstantinos; Arampatzis, Avi (Association for Computing Machinery (ACM), United States, 2011)
    Traditional tools for information retrieval (IR) evaluation, such as TREC’s trec_eval, have outdated command-line interfaces with many unused features, or ‘switches’, accumulated over the years. They are usually seen ...