Now showing items 1-20 of 20

    • 3-Boyutlu orman yangını yayılımı sistemi 

      Köse, Kıvanç; Yılmaz, E.; Grammalidis, N.; Aktuğ, B.; Çetin, A. Enis; Aydın, İ. (IEEE, 2008)
      In the last few years, due to the global warming and draught related to it, there is an increase in the number of forest fires. Forest fire detection is mainly done by people but there exists some automated systems in this ...
    • 3D forest fire propagation simulation 

      Köse, Kıvanç; Grammalidis, N.; Yılmaz, E.; Çetin, A. Enis (IEEE, 2008-05)
      The increase in the number of forest fires in the last few years dispatch governments to take precautions. Besides prevention, early intervention is also very important in fire fighting. If the firefighters know where the ...
    • 3D model compression using image compression based methods 

      Köse, Kıvanç (Bilkent University, 2007)
      A Connectivity-Guided AdaptiveWavelet Transform (CGAWT) based mesh compres- sion algorithm is proposed. On the contrary to previous work, the proposed method uses 2D image processing tools for compressing the mesh models. ...
    • Baǧlanırlıkla yönlendirilmiş uyarlamalı dalgacık dönüşümü ile üç boyutlu model sıkıştırılması 

      Köse, Kıvanç; Çetin, A. Enis; Güdükbay, Uğur; Onural, Levent (IEEE, 2007-06)
      Dikdörtgensel olmayan dalgacık dönüşümüne dayalı çok çözünürlüklü üç boyutlu model sıkıştırılması için iki yöntem önerilmektedir. Bunlar Sıradüzensel Ağaç Yapılarının Kümelere Bölütlenmesi (Set Partitioning In Hierarchical ...
    • Connectivity-guided adaptive lifting transform for image like compression of meshes 

      Köse, Kıvanç; Çetin, A. Enis; Güdükbay, Uğur; Onural, Levent (IEEE, 2007-05)
      We propose a new connectivity-guided adaptive wavelet transform based mesh compression framework. The 3D mesh is first transformed to 2D images on a regular grid structure by performing orthogonal projections onto the image ...
    • Content-adaptive color transform for image compression 

      Suhre, Alexander; Köse, Kıvanç; Çetin, A. Enis; Gürcan, Metin N. (IEEE, 2011)
      In this paper, an adaptive color transform for image compression is introduced. In each block of the image coefficients of the color transform are determined from the previously compressed neighboring blocks using weighted ...
    • Entropi fonsiyonuna dayalı uyarlanır karar tümleştirme yapısı 

      Günay, Osman; Töreyin, B. U.; Köse, Kıvanç; Çetin, A. Enis (2012-04)
      Bu bildiride, resim analizi ve bilgisayarla görü uygulamalarında kullanılmak üzere entropi fonksiyonuna dayanan uyarlanır karar tümleştirme yapısı geliştirilmiştir. Bu yapıda bileşik algoritma, herbiri güven derecesini ...
    • Entropy minimization based robust algorithm for adaptive networks 

      Köse, Kıvanç; Çetin, A. Enis; Gunay O. (IEEE, 2012)
      In this paper, the problem of estimating the impulse responses of individual nodes in a network of nodes is dealt. It was shown by the previous work in literature that when the nodes can interact with each other, fusion ...
    • Filtered Variation method for denoising and sparse signal processing 

      Köse, Kıvanç; Cevher V.; Çetin, A. Enis (IEEE, 2012)
      We propose a new framework, called Filtered Variation (FV), for denoising and sparse signal processing applications. These problems are inherently ill-posed. Hence, we provide regularization to overcome this challenge by ...
    • Fire detection and 3D fire propagation estimation for the protection of cultural heritage areas 

      Dimitropoulos, K.; Köse, Kıvanç; Grammalidis, N.; Çetin, A. Enis (Copernicus GmbH, 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, ...
    • Flame detection for video-based early fire warning for the protection of cultural heritage 

      Dimitropoulos, K.; Günay, Osman; Köse, Kıvanç; Erden, Fatih; Chaabene, F.; Tsalakanidou, F.; Grammalidis, N.; Çetin, Enis (2012-10-11)
      Cultural heritage and archaeological sites are exposed to the risk of fire and early warning is the only way to avoid losses and damages. The use of terrestrial systems, typically based on video cameras, is currently the ...
    • Fractional wavelet transform using an unbalanced lifting structure 

      Habiboǧlu, Y. Hakan; Köse, Kıvanç; Çetin, A. Enis (SPIE, 2011)
      In this article, we introduce the concept of fractional wavelet transform. Using a two-channel unbalanced lifting structure it is possible to decompose a given discrete-time signal x[n] sampled with period T into two ...
    • Image feature extraction using compressive sensing 

      Eleyan, A.; Köse, Kıvanç; Çetin, A. Enis (Springer, 2014)
      In this paper a new approach for image feature extraction is presented. We used the Compressive Sensing (CS) concept to generate the measurement matrix. The new measurement matrix is different from the measurement matrices ...
    • Motion based clustering of model animations using PCA 

      Köse, Kıvanç; Çetin, A. Enis (IEEE, 2009)
      In the last few years, there is great increase in capture and representation of real 3-Dimensonal scenes using 3D animation models. The 3D signals are then compressed, transmitted to the client side and reconstructed for ...
    • A multi-sensor network for the protection of cultural heritage 

      Grammalidis, N.; Çetin, A. Enis; Dimitropoulos, K.; Tsalakanidou F.; Köse, Kıvanç; Günay, Osman; Gouverneur, B.; Torri, D.; Kuruoglu, E.; Tozzi, S.; Benazza, A.; Chaabane F.; Kosucu, B.; Ersoy, C. (IEEE, 2011)
      The paper presents a novel automatic early warning system to remotely monitor areas of archaeological and cultural interest from the risk of fire. Since these areas have been treasured and tended for very long periods of ...
    • Nonrectangular wavelets for multiresolution mesh analysis and compression 

      Köse, Kıvanç; Çetin, A. Enis; Güdükbay, Uğur; Onural, Levent (IEEE, 2006)
      We propose a new Set Partitioning In Hierarchical Trees (SPIHT) based mesh compression framework. The 3D mesh is first transformed to 2D images on a regular grid structure. Then, this image-like representation is wavelet ...
    • Nonrectangular wavelets for multiresolution mesh analysis and compression 

      Köse, Kıvanç; Çetin, A. Enis; Güdükbay, Uğur; Onural, Levent (SPIE, 2006)
      We propose a new Set Partitioning In Hierarchical Trees (SPIHT) based mesh compression framework. The 3D mesh is first transformed to 2D images on a regular grid structure. Then, this image-like representation is wavelet ...
    • Progressive compression of digital elevation data using meshes 

      Köse, Kıvanç; Yılmaz, E.; Çetin, A. Enis (IEEE, 2009-07)
      In this paper a new Digital Elevation Map (DEM) image compression algorithm is proposed. DEM image can be threated as a grayscale image, whose pixel values are the elevation values of the map points. The grayscale DEM image ...
    • Signal and image processing algorithms using interval convex programming and sparsity 

      Köse, Kıvanç (Bilkent University, 2012)
      In this thesis, signal and image processing algorithms based on sparsity and interval convex programming are developed for inverse problems. Inverse signal processing problems are solved by minimizing the ℓ1 norm or the ...
    • Sıkıştırılmış algılama kullanarak yeni bir yüz gösterimi 

      Eleyan, A.; Köse, Kıvanç; Çetin, A. Enis (IEEE, 2011-04)
      Bu bildiride yüz resimleri için yeni bir tanımlayıcı sunulmaktadır. Sıkıştırılmış Algılama (Compressive Sensing) fikri kullanılarak, yüz imgelerinden öznitelikler çıkarılmıştır. Öznitelik çıkarımı sırasında Rastgele Gauss ...