Kurum Yazarı "Gerek, Ömer Nezih" Bildiri Koleksiyonu İçin Listeleme
-
Lossless image compression using an edge adapted lifting predictor
Gerek, Ömer Nezih; Çetin, AE (IEEE, 2005)We present a novel and computationally simple prediction stage in a Daubechies 5/3 - like lifting structure for lossless image compression. In the 5/3 wavelet, the prediction filter predicts the value of an odd-indexed ... -
A Motion Adaptive Wavelet-Denoising for Frame-Rate Up-Conversion
Görgülü, Şükrü; Gerek, Ömer Nezih (IEEE, 2016)This study introduces a method that employs a wavelet zerotree-based shrinkage algorithm motion-adaptively-combined with optical flow estimation for video frame rate up-conversion. In the method, an optical flow estimation ... -
A motion adaptive wavelet-denoising for frame-rate up-conversion [ÇerçEve Hizi Artirimi için Hareket Duyarli Dalgacik Düzeltme]
Görgülü, Şükrü; Gerek, Ömer Nezih (Institute of Electrical and Electronics Engineers Inc., 2016)This study introduces a method that employs a wavelet zerotree-based shrinkage algorithm motion-adaptively-combined with optical flow estimation for video frame rate up-conversion. In the method, an optical flow estimation ... -
Mycielski Algoritması ile Rüzgar Hızı Tahmini
Rüzgar hız tahmini, rüzgar ile ilgili mühendislik problemlerinde önemli bir yer tekil eder. Fakat her meteorolojik olay gibi rüzgar da rastsal davranışlar sergilemektedir. Dolayısıyla bilinen istatistiksel yöntemlerle duyarl ... -
Mycielski Approach for Synthetic Wind Speed Data Generation
Hocaoğlu, Fatih Onur; Fidan, Mehmet; Gerek, Ömer Nezih (IEEE, 2009)In this paper, a novel Mycielski based approach for wind speed data generation is developed and presented. The efficincy of the proposed approach is tested using hourly wind speed data obtained from Izmir region. To test ... -
Mycielski approach for synthetic wind speed data generation [Yapay rüzgar hizi verisi üretiminde mycielski yaklaşimi]
In this paper, a novel Mycielski based approach for wind speed data generation is developed and presented. The efficincy of the proposed approach is tested using hourly wind speed data obtained from İzmir region. To test ... -
The Mycielski78 compression algorithm
Gerek, Ömer Nezih; Fidan, Mehmet (IEEE, 2006)The Mycielski predictor is a prediction algorithm that utilizes the infinite past of a data sequence. The algorithm resembles the LZ77 compression method. LZ78, on the other hand, is a dictionary based lossless compression ... -
The mycielski78 compression algorithm [Mycielski78 sikiştirma algori·tmasi]
Gerek, Ömer Nezih; Fidan, Mehmet (2006)The Mycielski predictor is a prediction algorithm that utilizes the infinite past of a data sequence. The algorithm resembles the LZ77 compression method. LZ78, on the other hand, is a dictionary based lossless compression ... -
A novel 2-d model approach for the prediction of hourly solar radiation
Hocaoğlu, Fatih Onur; Gerek, Ömer Nezih; Kurban, Mehmet (Springer-Verlag Berlin, 2007)In this work, a two-dimensional (2-D) representation of the hourly solar radiation data is proposed. The model enables accurate forecasting using image prediction methods. One year solar radiation data that is acquired and ... -
A novel feature vector consisting of Ar-Ma model parameters for motor fault classification
Ece, Doğan Gökhan; Gerek, Ömer Nezih (IEEE, 2006)In this work, AR-MA parameters corresponding to zeros and poles of the z-plane model are extracted from the sampled current waveform spectra, and considered as elements of a feature vector to classify faulty motors. The ... -
A novel lossless image compression approach: "Cooperative prediction"
Topal, Cihan; Gerek, Ömer Nezih (2007)Conditional predictive image coders (such as LOCO, CALIC, etc.) split the prediction rule into logical cases (channels) and produce prediction residuals for each case. It is a known fact that the distributions of these ... -
On feature extraction for spam e-mail detection
Günal, Serkan; Ergin, Semih; Gülmezoğlu, M. Bilginer; Gerek, Ömer Nezih (Springer-Verlag Berlin, 2006)Electronic mail is an important communication method for most computer users. Spam e-mails however consume bandwidth resource, fill-up server storage and are also a waste of time to tackle. The general way to label an ... -
On the orthogonality of block wavelet transforms
Doğan, Muzaffer; Gerek, Ömer Nezih (IEEE, 2006)In this paper, orthogonality of Block Wavelet Transforms (BWT) is shown. First the orthogonality of one-stage and two-stage Block Wavelet Transforms is shown, then the result is generalized for multi-stage Block Wavelet Transform. -
On the orthogonality of block wavelet transforms [Blok dalgacik dönüşümlerinin dikligi üzerine]
Doğan, M.; Gerek, Ömer Nezih (2006)In this paper, orthogonality of Block Wavelet Transforms (BWT) is shown. First the orthogonality of one-stage and two-stage Block Wavelet Transforms is shown, then the result is generalized for multi-stage Block Wavelet Transform -
Pdf sharpening for multichannel predictive coders
Topal, Cihan; Gerek, Ömer Nezih (2006)Predictive coders that split the prediction decision into con-texts depending on the local image behaviour have proved to be practically useful and successful in image coding applications. Such predictive coders can be ... -
PLD : Power Line Detection System for Aircrafts
Yetgin, Ömer Emre; Gerek, Ömer Nezih (IEEE, 2017)Power Line Detection (PLD) is still an important issue for aircraft safety. In this study, two simple PLD algorithms are developed that utilize two alternative line detection algorithms (EDLines and LSD) and feed their ... -
PLD: Power line detection system for aircrafts
Yetgin, Ömer Emre; Gerek, Ömer Nezih (Institute of Electrical and Electronics Engineers Inc., 2017)Power Line Detection (PLD) is still an important issue for aircraft safety. In this study, two simple PLD algorithms are developed that utilize two alternative line detection algorithms (EDLines and LSD) and feed their ... -
Poverty level characterization via feature selection and machine learning
Mohamud, J. H.; Gerek, Ömer Nezih (Institute of Electrical and Electronics Engineers Inc., 2019)A persistent socio-cultural problem of mankind is 'poverty', which requires accurate characterization in order to construct well designed policies for intervention. Unfortunately, the categorization along the poverty - ... -
Power quality event detection using joint 2-D-wavelet subspaces
Ece, Doğan Gökhan; Gerek, Ömer Nezih (IEEE-Inst Electrical Electronics Engineers Inc, 2004)In this work, we present a novel two-dimensional (2-D) representation of power system waveforms for the automatic analysis and detection of transient events. The representation is composed of a matrix whose rows are formed ... -
Power quality event detection using joint 2D-wavelet subspaces
Gerek, Ömer Nezih; Ece, Dugan Gökhan (IEEE, 2003)In this work, we present a novel 2D representation of power system waveforms for the automatic analysis of transients. The representation is composed of a matrix whose rows are formed by time segments of digital waveforms. ...