Yazar "Boyraz, Ömer Faruk" için listeleme
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Design and implementation of a new memristive chaotic system with application in touchless fingerprint encryption
Lai, Qiang; Wan, Zhiqiang; Akgül, Akif; Boyraz, Ömer Faruk; Yıldız, Mustafa Zahid (Elsevier, 2020)In this paper, a new memristive chaotic system was constructed from three-dimensional Lorenztype system. The system has infinitely many equilibria and exhibits coexisting attractors. The dynamic evolution corresponds to ... -
Development of a low-cost microcomputer based vein imaging system
Yıldız, Mustafa Zahid; Boyraz, Ömer Faruk (Elsevier Science Bv, 2019)In this study, a low-cost microcomputer based dorsal hand-vein imaging system was developed by utilizing noninvasive near infrared imaging technology for the patients having hand vein visibility problems. On the microcomputer, ... -
Doğrusal olmayan yeni bir sistem ile damar görüntülerinin mikrobilgisayar tabanlı olarak şifrelenmesi
Akgül, Akif; Yıldız, Mustafa Zahid; Boyraz, Ömer Faruk; Güleryüz, Emre; Kaçar, Sezgin; Güvercin, Bilal (2020)Bu çalışmada yeni bir kaotik sistem ile mikrobilgisayar tabanlı olarak el üstü damar görüntülerininşifrelenerek, güvenli bir şekilde veri tabanında saklanması ve kullanılması amaçlanmıştır. Çalışmakapsamında öncelikle ... -
Görüntü İşleme Tabanlı Kutu Sayma Yöntemi ile Fraktal Boyut Hesabı için Arayüz Tasarımı
Çimen, Murat Erhan; Boyraz, Ömer Faruk; Garip, Zeynep B.; Pehlivan, İhsan; Yıldız, Mustafa Zahid; Boz, Ali Fuat (2021)Öklid geometrisi kullanılarak düzensiz ve kompleks şekillerin modellenmesi eksik kalmaktadır. Fraktal geometri düzensiz,karmaşık ve kompleks yapıların matematiksel olarak ifade edilebilmesine imkan vermektedir. Fraktal ... -
An Interface Design for Calculation of Fractal Dimension
Pehlivan, İhsan; Boyraz, Ömer Faruk; Boz, Ali Fuat; Çimen, Murat Erhan; Yıldız, Mustafa Zahid; Garip, Zeynep (2020)Partially insufficient is the modelling of irregular and complex forms using Euclidean geometry. On the other hand, fractal geometry allows irregular complex forms and structures to be expressed in mathematical terms. While ... -
Lorenz Kaotik Sisteminin Doğrusal Geri Beslemeli, Yüksek Kazanç, Yüksek Frekans ve Model Öngörülü Kontrol ile Denetlenmesi
Çimen, Murat Erhan; Pala, Muhammed Ali; Boyraz, Ömer Faruk; Garip, Zeynep B.; Akgül, Akif; Yıldız, Mustafa Zahid; Boz, Ali Fuat (2021)Günümüze kadar gelişen ve geliştirilmeye devam edilen, doğrusal veya doğrusal olmayan, zamanla değişen veya zamanla değişmeyen sistemler için birçok kontrol yöntemleri bulunmaktadır. Bu çalışmada doğrusal olmayan Lorenz ... -
A new dorsal hand vein authentication system based on fractal dimension box counting method
Çimen, Murat Erhan; Boyraz, Ömer Faruk; Yıldız, Mustafa Zahid; Boz, Ali Fuat (Elsevier Gmbh, 2021)Dorsal hand vein pattern is a physiological feature that can distinguish and define one person from another. Feature extraction from images is considered as the most important step in bio-metric systems. In this study, a ... -
A Novel Encryption Method for Dorsal Hand Vein Images on a Microcomputer
Yıldız, Mustafa Zahid; Boyraz, Ömer Faruk; Güleryüz, Emre; Akgül, Akif; Hussain, Iqtadar (IEEE-Inst Electrical Electronics Engineers Inc, 2019)In this paper, a Lorenz-like chaotic system was developed to encrypt the dorsal hand patterns on a microcomputer. First, the dorsal hand vein images were taken from the subjects via an infrared camera. These were subjected ... -
A simple fractional-order chaotic system based on memristor and memcapacitor and its synchronization application
Akgül, Akif; Rajagopal, Karthikeyan; Durdu, Ali; Pala, Muhammed Ali; Boyraz, Ömer Faruk; Yıldız, Mustafa Zahid (Pergamon-Elsevier Science Ltd, 2021)Memelements play an important part in the design of high density memory systems and low power memory. In this paper, we created a novel fractional-order chaotic circuit with a memristor and a memcapacitor with a linear ... -
An unforced megastable chaotic oscillator and its application on protecting electrophysiological signals
Akgül, Akif; Boyraz, Ömer Faruk; Rajagopal, Karthikeyan; Güleryüz, Emre; Yıldız, Mustafa Zahid; Kutlu, Mustafa (Walter De Gruyter Gmbh, 2020)In this paper, we introduce a novel 3D chaotic oscillator which shows megastability without any external excitation. Some important dynamical properties of the proposed novel system were derived and investigated. Data ...