Electrical - Electronic Engineering / Elektrik - Elektronik Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/11

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  • Conference Object
    Citation - Scopus: 3
    Sahne Aydınlatmasında Kullanılan Işık Kaynağının Renklilik Değerlerinin Tek İmge Kullanılarak Kestirimi
    (IEEE, 2011) Ozan, Şükrü; Gümüştekin, Şevket
    In this study, main goal is to estimate scene illuminant chromaticity values for each of the three color channels (red, green, blue). It is found that analysis of the pixel values, which are expressed by dichromatic reflection and inverse-intensity chromaticity space definitions, with appropriate statistical methods gives aproximate values for light source chromaticity within an acceptable error range. Single image of a scene is sufficient for calculations. We saw that chromaticity values of light sources with different colors can be approximately calculated. © 2011 IEEE.
  • Conference Object
    Ölçülmüş Çydf Verilerinin Lafortune Modeli ile Etkin Gösterimi
    (IEEE, 2010) Ozan, Şükrü; Gümüştekin, Şevket
    The bi-directional reflectance distribution function (BRDF) describes the appearance of a material by its interaction with light. In this study, Lafortune BRDF model is fitted to densely sampled measured BRDF data by using Levenberg - Marquardt Algorithm. The obtained results are visualised by a physically based ray tracing software and the proposed method is analysed. ©2010 IEEE.