Now showing items 1-15 of 15

    • Automated detection and enhancement of microcalcifications in mammograms using nonlinear subband decomposition 

      Ansari, R.; Gürcan, M. Nafi; Yardımcı, Yasemin; Çetin, A. Enis (IEEE, 1997)
      In this paper, computer-aided detection and enhancement of microcalcifications in mammogram images are considered. The mammogram image is first decomposed into subimages using a `subband' decomposition filter bank which ...
    • A color and shape based algorithm for segmentation of white blood cells in peripheral blood and bone marrow images 

      Arslan, S.; Ozyurek, E.; Gunduz Demir, C. (John Wiley & Sons, Inc., 2014)
      Computer-based imaging systems are becoming important tools for quantitative assessment of peripheral blood and bone marrow samples to help experts diagnose blood disorders such as acute leukemia. These systems generally ...
    • Engineering nonlinear response of nanomaterials using Fano resonances 

      Turkpence, D.; Akguc G.B.; Bek, A.; Tasgin, M.E. (Institute of Physics Publishing, 2014)
      We show that nonlinear optical processes of nanoparticles can be controlled by the presence of interactions with a molecule or a quantum dot. By choosing the appropriate level spacing for the quantum emitter, one can either ...
    • A hybrid classification model for digital pathology using structural and statistical pattern recognition 

      Ozdemir, E.; Gunduz-Demir, C. (Institute of Electrical and Electronics Engineers, 2013)
      Cancer causes deviations in the distribution of cells, leading to changes in biological structures that they form. Correct localization and characterization of these structures are crucial for accurate cancer diagnosis and ...
    • Iterative H-minima-based marker-controlled watershed for cell nucleus segmentation 

      Koyuncu, Can Fahrettin; Akhan, Ece; Ersahin, T.; Cetin Atalay, R.; Gunduz Demir, Çiğdem (John Wiley & Sons, Inc., 2016)
      Automated microscopy imaging systems facilitate high-throughput screening in molecular cellular biology research. The first step of these systems is cell nucleus segmentation, which has a great impact on the success of the ...
    • Nanosecond pulsed laser ablated sub-10 nm silicon nanoparticles for improving photovoltaic conversion efficiency of commercial solar cells 

      Rasouli, H. R.; Ghobadi, A.; Ghobadi, T. G. U.; Ates, H.; Topalli, K.; Okyay, Ali Kemal (Institute of Physics Publishing Ltd., 2017)
      In this paper, we demonstrate the enhancement of photovoltaic (PV) solar cell efficiency using luminescent silicon nanoparticles (Si-NPs). Sub-10 nm Si-NPs are synthesized via pulsed laser ablation technique. These ultra-small ...
    • Orbital magnetization of single and double quantum dots in a tight-binding model 

      Aldea, A.; Moldoveanu, V.; Niţǎ, M.; Manolescu, A.; Gudmundsson, V.; Tanatar, Bilal (American Physical Society, 2003)
      We calculate the orbital magnetization of single and double quantum dots coupled both by Coulomb interaction and by electron tunneling. The electronic states of the quantum dots are calculated in a tight-binding model, and ...
    • Osmanlıca kelimeleri eşleme 

      Ataer, Esra; Duygulu, Pınar (IEEE, 2007-06)
      Osmanlı arşivleri dünyanın pek çok yerinden araştırmacının ilgi alanına girmektedir. Fakat bu belgelerin elle çevirisi zor bir iş olduğu için, bu arşivler kullanılamaz durumdadır. Otomatik çeviri gerekmektedir, fakat ...
    • Projections onto convex sets (POCS) based optimization by lifting 

      Çetin, A. Enis; Bozkurt, Alican; Günay, Osman; Habiboglu, Yusuf Hakan; Köse, K.; Onaran, İbrahim; Tofighi, Mohammad; Sevimli, Rasim Akın (IEEE, 2013)
      A new optimization technique based on the projections onto convex space (POCS) framework for solving convex and some non-convex optimization problems are presented. The dimension of the minimization problem is lifted by ...
    • Resim arama sonuçlarının çizge tabanlı bir yöntemle yeniden sıralanması 

      Sevil, Sare; Zitouni, Hilal; İkizler, Nazlı; Özkan, D.; Duygulu, Pınar (IEEE, 2008-04)
      Arama motorları aracılığı ile arama yapmak günümüzde internetin en yaygın kullanım amaçlarından biridir. Ancak sorgu sonuçları, özellikle resim arama sorgularında, çoğu zaman sorgu ile ilgli olmayan sonuçlar da içerebilmektedir. ...
    • Resolution enhancement of low resolution wavefields with POCS algorithm 

      Çetin, A. Enis; Özaktaş, H.; Haldun M. Özaktaş (The Institution of Engineering and Technology, 2003)
      The problem of enhancing the resolution of wavefield or beam profile measurements obtained using low resolution sensors is addressed by solving the problem of interpolating signals from partial fractional Fourier transform ...
    • Semantic scene classification for image annotation and retrieval 

      Çavuş, Özge; Aksoy, Selim (Springer, 2008-12)
      We describe an annotation and retrieval framework that uses a semantic image representation by contextual modeling of images using occurrence probabilities of concepts and objects. First, images are segmented into regions ...
    • System for MR image-guided prostate interventions: Canine study 

      Susil, R. C.; Krieger, A.; Derbyshire, J. A.; Tanacs, A.; Whitcomb, L. L.; Fichtinger, G.; Atalar, Ergin (Radiological Society of North America, Inc.Radiological Society of North America, Inc., 2003)
      The purpose of this study was to demonstrate the use of a transrectal system that enables precise magnetic resonance (MR) image guidance and monitoring of prostate interventions. The system used a closed-bore 1.5-T MR ...
    • Three-dimensional motion and dense-structure estimation using convex projections 

      Alatan, A. Aydın; Erdem, A. Tanju; Onural, Levent (SPIE, 1997-02)
      We propose a novel method for estimating the 3D motion and dense structure of an object form its two 2D images. The proposed method is an iterative algorithm based on the theory of projections onto convex sets (POCS) that ...
    • Video gözetleme uygulamalarında kamera sabotaj sezimi 

      Aksay, A.; Temizel, A.; Çetin, A. Enis (IEEE, 2007-06)
      Son yıllarda video gözetim uygulamaları için kullanılan kamera sayılarında kayda değer artış olmuştur. Bu kameraların amaçlandığı gibi çalışıyor olması anlamlı bilgi yakalaması önemlidir. Suç işleyecek kişiler kamera önünü ...