Yazar "Gerek, Ömer Nezih" için listeleme
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A 2 dimensional solar radiation model [2 Boyutlu bir güneş işinim şiddeti modeli]
In this study solar radiation data obtained from Eskisehir region is mathematically modeled using a two dimentional (2D) approach. The approach and model is novel in the literature of solar radiation modeling. The analysis ... -
2-D analysis and compression of power-quality event data
Gerek, Ömer Nezih; Ece, Dugan Gökhan (IEEE-Inst Electrical Electronics Engineers Inc, 2004)This paper introduces a novel two-dimensional (2-D) representation of the power quality event data. 2-D discrete-time wavelet transform is applied to the 2-D representation of real-life event data. The proposed representation ... -
A 2-D orientation-adaptive prediction filter in lifting structures for image coding
Gerek, Ömer Nezih; Çetin, A. E. (2006)Lifting-style implementations of wavelets are widely used in image coders. A two-dimensional (2-D) edge adaptive lifting structure, which is similar to Daubechies 5/3 wavelet, is presented. The 2-D prediction filter predicts ... -
A 2D representation for analysis and coding of power quality events
Gerek, Ömer Nezih; Ece, Dugan Gökhan (IEEE, 2003)In this work, we demonstrate examples about uses of practical image processing techniques over a new interpretation of power quality event data. Power quality event data are 1D data obtained from a real life system with ... -
A 3D Lifting Based Method Augmented by Motion Compensation for Video Coding
Telceken, Sedat; Görgülü, Şükrü; Gerek, Ömer Nezih (IEEE, 2009)This study introduces a spatio-temporal lifting based algorithm to be used in compression of video signals. The temporal correlation of consecutive frames causes temporal redundancies, which are subject to lifting-like ... -
A 3D Lifting Based Motion Compensation Augmented Video Coder
Telceken, Sedat; Görgülü, Şükrü; Gerek, Ömer Nezih (IEEE, 2009)This study introduces a video compression method that uses spatio - temporal lifting based algorithms to compress the video signals. The temporal correlation of consecutive frames causes temporal redundancies, which are ... -
A 3D lifting based motion compensation augmented video coder [Hareket dengeleme katkili 3B yükseltmeye dayali video kodlayici]
This study introduces a video compression method that uses spatio - temporal lifting based algorithms to compress the video signals. The temporal correlation of consecutive frames causes temporal redundancies, which are ... -
Adaptive filter banks for lossless image compression
Öktem, R.; Gerek, Ömer Nezih; Çetin, E.; Öktem, L.; Egiazarian, K. (2001)A subband decomposition based lossless image compression algorithm based on adaptive is described. The decomposition is achieved by a two-channel adaptive filter bank. The resulting coefficients are lossy coded first, and ... -
Adaptive polyphase subband decomposition structures for image compression
Gerek, Ömer Nezih; Çetin, AE (IEEE-Inst Electrical Electronics Engineers Inc, 2000)Subband decomposition techniques have been extensively used for data coding and analysis. In most filter banks, the goal is to obtain subsampled signals corresponding to different spectral regions of the original data. ... -
An adaptive statistical method for power quality analysis
Gerek, Ömer Nezih; Ece, Dugan Gökhan (IEEE-Inst Electrical Electronics Engineers Inc, 2005)Digital fault recorders installed for monitoring current and/or voltage waveforms acquire and store vast amount of waveform data for post processing. Because of this, effective offline automated event detection from acquired ... -
Automatic recognition of scenes with power line wires in real life aerial images using DCT-based features
Yetgin, Ömer Emre; Gerek, Ömer Nezih (Academic Press Inc Elsevier Science, 2018)This paper presents results of power line scene detection methods that use new feature extraction/selection strategies based on Discrete Cosine Transform (DCT) of scenes obtained from aircraft-based cameras. Whenever a ... -
A biorthogonal wavelet design technique using Karhunen-Loeve transform approximation
Kale, Mehmet Cemil; Ataç, Gizem; Gerek, Ömer Nezih (Academic Press Inc Elsevier Science, 2016)The lifting style biorthogonal wavelet implementation has a nice property of enabling flexible design; it is immediately reversible and has a simple relation to subband filters. In this work, we present a method to design ... -
Biorthogonal Wavelet Vanishing Moment Increment Technique
Kale, Mehmet Cemil; Ataç, Gizem; Gerek, Ömer Nezih (IEEE, 2015)Among several lifting style biorthogonal wavelets, Daubechies and Sweldens wavelets provide the maximum number of vanishing moments for the shortest filter length. In this research we propose a method to increase the number ... -
Biorthogonal wavelet vanishing moment increment technique [Çiftdikgen Dalgaciklar Için Yokolan Momenti Arttirma Tekni?i]
Kale, Mehmet Cemil; Ataç, Gizem; Gerek, Ömer Nezih (Institute of Electrical and Electronics Engineers Inc., 2015)Among several lifting style biorthogonal wavelets, Daubechies and Sweldens wavelets provide the maximum number of vanishing moments for the shortest filter length. In this research we propose a method to increase the number ... -
Bir elektronik-belediyecilik uygulaması : su ücretlerinin internet üzerinden ödenmesi
Onarcan, Ahmet Okan (Anadolu Üniversitesi, 2002)Bu tezde, elektronik belediyecilik yöntemleri kullanılarak su ücretlerinin internet üzerinden ödenmesi gerçekleştirilmiştir. Bunun için Kent Bilgi Sistemi açıklanmış ve Türkiye'de elektronik belediyeciliğin durumu ... -
Cable and Wire Detection System for Aircrafts
Yetgin, Ömer Emre; Gerek, Ömer Nezih (IEEE, 2013)EDlines is a robust and accurate line segment detector that is known to run 11 times faster than the popular (and fastest known) method of LSD, while avoiding necessity of parameter adjustments. In this work, this detector ... -
Cable and wire detection system for aircrafts [Hava araçlari için tel ve kablo tespit sistemi]
Yetgin, Ömer Emre; Gerek, Ömer Nezih (2013)EDlines is a robust and accurate line segment detector that is known to run 11 times faster than the popular (and fastest known) method of LSD, while avoiding necessity of parameter adjustments. In this work, this detector ... -
Carbon and energy footprint of electrochemical vinegar wastewater treatment
Gerek, Emine Esra; Yılmaz, Seval; Koparal, Ali Savaş; Gerek, Ömer Nezih (E D P Sciences, 2017)Electrochemical treatment of wastewaters that are rich in organic compounds is a popular method, due to its acidic nature that avoids biological treatment. In many cases, the pollution hazard is considered as the chemical ... -
Circular Uncertainty method for range-only localization with imprecise sensor positions
Uluskan, Seçkin; Filik, Tansu; Gerek, Ömer Nezih (Springer, 2018)This study provides an effective new method to solve the range-only localization in the presence of sensor position errors. In practice, the sensors can stay only within a limited region whereas the target can be far from ... -
Classifier-based offline feature selection and evaluation for visual tracking of sea-surface and aerial targets
Çakır, Serdar; Aytaç, Tayfun; Yıldırım, Alper; Gerek, Ömer Nezih (Spie-Soc Photo-Optical Instrumentation Engineers, 2011)An offline feature selection and evaluation mechanism is used in order to develop a robust visual tracking scheme for sea-surface and aerial targets. The covariance descriptors, known to constitute an efficient signature ...
