Now showing items 1-20 of 55

    • 3D human pose search using oriented cylinders 

      Pehlivan, S.; Duygulu P. (2009)
      In this study, we present a representation based on a new 3D search technique for volumetric human poses which is then used to recognize actions in three dimensional video sequences. We generate a set of cylinder like 3D ...
    • Attributes2Classname: a discriminative model for attribute-based unsupervised zero-shot learning 

      Demirel, B.; Cinbis, R. G.; Ikizler-Cinbis, N. (Institute of Electrical and Electronics Engineers Inc., 2017)
      We propose a novel approach for unsupervised zero-shot learning (ZSL) of classes based on their names. Most existing unsupervised ZSL methods aim to learn a model for directly comparing image features and class names. ...
    • Camera-based virtual environment interaction on mobile devices 

      Çapin, T.; Haro, A.; Setlur, V.; Wilkinson, S. (Springer Verlag, 2006)
      Mobile virtual environments, with real-time 3D and 2D graphics, are now possible on smart phone and other camera-enabled devices. Using computer vision, the camera sensor can be treated as an input modality in applications ...
    • Combined filtering and key-frame reduction of motion capture data with application to 3DTV 

      Önder O.; Erdem Ç.; Erdem, T.; Güdükbay, U.; Özgüç, B. (2006)
      A new method for combined filtering and key-frame reduction of motion capture data is proposed. Filtering of motion capture data is necessary to eliminate any jitter introduced by a motion capture system. Key-frame reduction, ...
    • Computationally efficient wavelet affine invariant functions for 2D object recognition 

      Bala, E.; Cetin, A. E. (IEEE, 2003)
      In this paper, an affine invariant function is presented for object recognition from wavelet coefficients of the object boundary. In previous works, undecimated wavelet transform was used for affine invariant functions. ...
    • Computer vision based analysis of potato chips-A tool for rapid detection of acrylamide level 

      Gökmen, V.; Senyuva, H. Z.; Dülek, B.; Çetin, E. (Wiley - VCH Verlag GmbH & Co. KGaA, 2006)
      In this study, analysis of digital color images of fried potato chips were combined with parallel LCMS based analysis of acrylamide in order to develop a rapid tool for the estimation of acrylamide during processing. Pixels ...
    • Computer vision based forest fire detection 

      Uǧur Töreyin, B.; Enis Çetin, A. (2008)
      Lookout posts are commonly installed in the forests all around Turkey and the world. Most of these posts have electricity. Surveillance cameras can be placed on to these surveillance towers to detect possible forest fires. ...
    • Computer vision based method for real-time fire and flame detection 

      Töreyin, B. U.; Dedeoǧlu, Y.; Güdükbay U.; Çetin, A. E. (Elsevier BV, 2006-01-01)
      This paper proposes a novel method to detect fire and/or flames in real-time by processing the video data generated by an ordinary camera monitoring a scene. In addition to ordinary motion and color clues, flame and fire ...
    • Computer vision based text and equation editor for LATEX 

      Öksüz Ö.; Güdükbay, U.; Çetin, E. (2004)
      In this paper, we present a computer vision based text and equation editor for LATEX. The user writes text and equations on paper and a camera attached to a computer records actions of the user. In particular, positions ...
    • Computer vision based unistroke keyboard system and mouse for the handicapped 

      Erdem, M.E.; Erdem I.A.; Atalay V.; Cetin, A.E. (IEEE Computer Society, 2003)
      In this paper, a unistroke keyboard based on computer vision is described for the handicapped. The keyboard can be made of paper or fabric containing an image of a keyboard, which has an upside down U-shape. It can even ...
    • Content-based image retrieval in store catalogs 

      Baysal, S.; Kurt, M.C.; Aydogdu G.; Damc P.; Telmen I.; Duygulu P. (2009)
      In this paper, an overview of an application, which aims to make significant improvements on access methods to the online shopping catalogs, is presented. In current online shopping sites, only browsing and semantic based ...
    • Detection of tree trunks as visual landmarks in outdoor environments 

      Yıldız, Tuğba (Bilkent University, 2010)
      One of the basic problems to be addressed for a robot navigating in an outdoor environment is the tracking of its position and state. A fundamental first step in using algorithms for solving this problem, such as various ...
    • A discussion on homography between stationary multi-camera systems and the soccer field model 

      Baysal, S.; Duygulu P.; Kayalar, C. (2012)
      Computer vision based athlete tracking systems use different methods to segment players from the background and then track them automatically throughout the video. It is insufficient to know a player's position on the image ...
    • Entropy functional based adaptive decision fusion framework 

      Günay, O.; Töreyin, B. U.; Köse K.; Çetin, A. E. (2012)
      In this paper, an entropy functional based online adaptive decision fusion framework is developed for image analysis and computer vision applications. In this framework, it is assumed that the compound algorithm consists ...
    • Exploiting architectural features of a computer vision platform towards reducing memory stalls 

      Mustafa, Naveed Ul; O’Riordan, M. J.; Rogers, S.; Ozturk, O. (Springer Verlag, 2018)
      Computer vision applications are becoming more and more popular in embedded systems such as drones, robots, tablets, and mobile devices. These applications are both compute and memory intensive, with memory bound stalls ...
    • FAME: Face Association through Model Evolution 

      Golge, E.; Duygulu P. (IEEE Computer Society, 2014)
      We attack the problem of building classifiers for public faces from web images collected through querying a name. The search results are very noisy even after face detection, with several irrelevant faces corresponding to ...
    • Fire detection and 3D fire propagation estimation for the protection of cultural heritage areas 

      Dimitropoulos, K.; Köse, K.; Grammalidis, N.; Cetin, E. (International Society for Photogrammetry and Remote Sensing, 2010)
      Beyond taking precautionary measures to avoid a forest fire, early warning and immediate response to a fire breakout are the only ways to avoid great losses and environmental and cultural heritage damages. To this end, ...
    • Flexible test-bed for unusual behavior detection 

      Petrás I.; Beleznai, C.; Dedeolu, Y.; Pards, M.; Kovács L.; Szlávik, Z.; Havasi L.; Szirányi, T.; Töreyin, B.U.; Güdükbay, U.; Çetin, A.E.; Canton-Ferrer, C. (2007)
      Visual surveillance and activity analysis is an active research field of computer vision. As a result, there are several different algorithms produced for this purpose. To obtain more robust systems it is desirable to ...
    • GCap: Graph-based automatic image captioning 

      Pan J.-Y.; Yang H.-J.; Faloutsos C.; Duygulu, P. (IEEE Computer Society, 2004)
      Given an image, how do we automatically assign keywords to it? In this paper, we propose a novel, graph-based approach (GCap) which outperforms previously reported methods for automatic image captioning. Moreover, it is ...
    • Gibbs random field model based 3-D motion estimation from video sequences 

      Alatan, A. A.; Levent, O. (IEEE, 1994)
      In contrast to previous global 3D motion concept, a Gibbs random field based method, which models local interactions between motion parameters defined at each point on the object, is proposed. An energy function which gives ...