Browsing by Author "Öztürk, Aydin"

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    Article
    Citation - WoS: 34
    Citation - Scopus: 40
    A General BRDF Representation Based on Tensor Decomposition
    (WILEY, 2011) Ahmet Bilgili; Aydin Ozturk; Murat Kurt; Kurt, Murat; Bilgili, Ahmet; Öztürk, Aydin
    Generating photo-realistic images through Monte Carlo rendering requires efficient representation of lightsurface interaction and techniques for importance sampling. Various models with good representation abilities have been developed but only a few of them have their importance sampling procedure. In this paper we propose a method which provides a good bidirectional reflectance distribution function (BRDF) representation and efficient importance sampling procedure. Our method is based on representing BRDF as a function of tensor products. Four-dimensional measured BRDF tensor data are factorized using Tucker decomposition. A large data set is used for comparing the proposed BRDF model with a number of well-known BRDF models. It is shown that the underlying model provides good approximation to BRDFs.
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    Editorial
    Communications in Computer and Information Science: Preface
    (2011) Elena García-Barriocanal; Zeynel Cebeci; Mehmet Cudi Okur; Aydin Öztürk; García-Barriocanal, Elena; Cebeci, Zeynel; Okur, Mehmet C.; Öztürk, Aydin
    [No abstract available]
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    Conference Object
    Citation - Scopus: 1
    Metadata and semantic research: 5th international conference MTSR 2011 Izmir Turkey October 12-14 2011 proceedings
    (Springer Verlag, 2011) Elena García-Barriocanal; Zeynel Cebeci; Mehmet Cudi Okur; Aydin Öztürk; García-Barriocanal, Elena; Cebeci, Zeynel; Okur, Mehmet C.; Öztürk, Aydin
    [No abstract available]
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    Conference Object
    Mobile GPU-Based Importance Sampling
    (IEEE, 2014) Ozkan Anil Toral; Serkan Ergun; Murat Kurt; Aydin Ozturk; Ergun, Serkan; Kurt, Murat; Töral, Özkan Ami; Öztürk, Aydin
    In this paper we developed an interactive global illumination application for mobile devices and we show that interactive filtered importance sampling is possible even with a low-power mobile graphics processing unit (GPU). Taking the limited power and the screen size of mobile devices into account we designed a user interface that allows selecting different predefined objects environments and textures. With our implementation desired materials can be visualized interactively by changing the parameters of Bidirectional Reflectance Distribution Function (BRDF).
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    Conference Object
    Citation - Scopus: 1
    Modeling BRDF by a probability distribution
    (2010) Aydin Öztürk; Murat Kurt; Ahmet Bilgili; Kurt, Murat; Bilgili, Ahmet; Öztürk, Aydin
    In this work we investigate reciprocity and energy conservation properties of a BRDF model which is based on a probability distribution. Representational ability of underlined model is demonstrated using a measured BRDF data set. We show that our model satisfies both reciprocity and energy conservation properties of BRDF. © 2013 Elsevier B.V. All rights reserved.