Browsing by Author "Bayazıt, Uluğ"
Now showing items 1-13 of 13
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3-B nesne bilgilerinin vektor nicemleme yöntemleri ile sıkıştırılması
Orcay, Özgür; Konur, Umut; Bayazıt, Uluğ; Gürgen, Sadık Fikret (IEEE, 2004)Bu çalışmanın amacı, bağlanırlık kodlaması için gerçeklenmiş [I]'deki algoritmayı bazı yenilikler ile uygulamak ve koordinat sıkıştırması için 3-B (3 Boyutlu) nesne gösterimleri alanında kullanımı kısıtlı olan kayıplı bir ... -
3-D Mesh geometry compression with set partitioning in the spectral domain
Bayazıt, Uluğ; Konur, Umut; Ateş, Hasan Fehmi (IEEE-INST Electrical Electronics Engineers Inc, 2010-02)This paper explains the development of a highly efficient progressive 3-D mesh geometry coder based on the region adaptive transform in the spectral mesh compression method. A hierarchical set partitioning technique, ... -
Algorithmic modifications to SPIHT
Bayazıt, Uluğ; Pearlman, William A. (IEEE, 2001)This paper proposes several low complexity algorithmic modifications to the SPIHT (Set Partitioning in Hierarchical Trees) image coding method of [3] The modifications exploit universal traits common to the real world ... -
Classification-based macroblock layer rate control for low delay transmission of H.263 video
Bayazıt, Uluğ (IS & T - Soc Imaging Science Technology, 2003-07)Puri and Aravind's method of macroblock bit count estimation for video rate control is based on the classification of the macroblock data into discrete classes and assigning a unique non-linear estimate for each class and ... -
Cluster based sensors scheduling in a target tracking application with particle filter method
Özfidan, Özgür (Işık Üniversitesi, 2006)In multisensor applications, management of sensors is neccessary for the classification of data they produce and for the efficient use of sensors as well. One of the most important aspects in sensor management is the sensor ... -
Linear filtering of image subbands for low complexity postprocessing of decoded color images
Bayazıt, Uluğ (SPIE-Int Soc Optical Engineering, 2005)In [1], image adaptive linear minimum mean squared error (LMMSE) filtering was proposed as an enhancement layer color image coding technique that exploited the statistical dependencies among the luminance/chrominance or ... -
New approaches for channel estimation in wireless communications
Şenol, Habib (Işık Üniversitesi, 2006-03-10)This thesis first proposes a conputationally efficient, pilot-aided linear minimum mean square error (MMSE) batch channel estimation algorthm for the orthogonal frequency division multiplexing OFDM systems in unkonown ... -
Postprocessing of decoded color images by adaptive linear filtering
Bayazıt, Uluğ (Elsevier Science, 2003-02)This paper presents an image adaptive linear filtering method for the reconstruction of the RGB (red, blue, green) color coordinates of a pixel from the lossy compressed luminance/chrominance color coordinates. In the ... -
Predictive vector quantization of 3-D mesh geometry by representation of vertices in local coordinate systems
Bayazıt, Uluğ; Orcay, Özgür; Konur, Umut; Gürgen, Sadık Fikret (Elsevier Inc, 2007)In predictive 3-D mesh geometry coding, the position of each vertex is predicted from the previously coded neighboring vertices and the resultant prediction error vectors are coded. In this work, the prediction error vectors ... -
Predictive vector quantization of 3-D polygonal mesh geometry by representation of vertices in local coordinate systems
Bayazıt, Uluğ; Orcay, Özgür; Konur, Umut; Gürgen, Fikret Sadık (IEEE, 2005)A large family of lossy 3-D mesh geometry compression schemes operate by predicting the position of each vertex from the coded neighboring vertices and encoding the prediction error vectors. In this work, we first employ ... -
Significance map pruning and other enhancements to SPIHT image coding algorithm
Bayazıt, Uluğ (Elsevier Science, 2003-10)This paper proposes several enhancements to the Set Partitioning in Hierarchical Trees (SPIHT) image coding algorithm without changing the original algorithm's general skeleton. First and foremost, a method for significance ... -
Spektral yöntemler ve küme bölüntüleme yaklaşımlarıyla 3B nesne bilgilerinin sıkıştırılması
Konur, Umut; Bayazıt, Uluğ; Gürgen, Fikret; Orcay, Özgür (IEEE, 2006)Spekral dönüşümle elde edilen katsayıları küme bölüntüleme yaklaşımlarıyla işleyerek 3B nesne geometrilerini kodlayan bir yöntem öneriyoruz. [1]' de anlatılan spektral yöntem düzensiz tel filelerde yüksek hız-bozunum ... -
Vektör uzayında sıradüzensel ağaç yapısı ile düzenlenmiş metin veri tabanlarının çoklu yollar üzerinden sorgulanması
Ayan, Uğur; Bayazıt, Uluğ; Gürgen, Fikret (IEEE, 2004)Web sayfaları, makaleler, kitap veya dergi isimlerinden oluşan büyük doküman yığınları üzerinde sorgulama yaparken dokümanları vektörlere ve doküman topluluklarını matrislere indirgemek sorgulamaları çok daha hızlandırır ...
