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Mobile sinks are proposed for load-balancing and achieving uniform energy-consumption in wireless sensor networks. However, advertising the location of the mobile sink to the network introduces an overhead in terms of energy consumption and packet delays. In this paper, we propose a new routing protocol, Ring Routing, which aims to minimize this overhead while preserving the advantages of mobile sinks...
Nowadays, deployment of forensic document investigation systems that employ hyperspectral image processing is being widespread. The reason such systems are being preferred is mainly due to their non-destructive nature of document investigation, fast processing time, and the ability to reveal erased and covered writings, and details. On the other hand, analyzing hyperspectrum, obtained after a document...
In this study a proposal is made to classify the maqams of songs in Turkish Maqam Music. The MIRToolbox (a toolbox for MATLAB) is used to extract the features which are used in audio and music processing. Obtained data are preprocessed by principal component analysis. The songs are clustered by k-means algorithm and classified by feed forward artificial neural networks according to their maqams.
Full Search video stabilization method is implemented on FPGA to realize its real time performance. Also, the method is implemented and tested in MATLAB. FPGA results are compared with MATLAB's to see the accuracy performance. The input video is PAL which frame period is 40 ms. The FPGA implementation is capable of producing new stabilization data at every PAL frame which allows the implementation...
Pattern identification algorithms can be exploited for single-class or multi-class identification problems. In conventional applications, identification algorithms are based on functions of measured features. However in some cases, we already have an identification algorithm but the measured features are different from the features expected by the algorithm. In such cases, we can first estimate the...
In this paper, a flame detection system using a differential Pyro-electric Infrared (PIR) sensor is proposed. A differential PIR sensor is only sensitive to sudden temperature variations within its viewing range and it produces a time-varying signal. The wavelet transform of the differential PIR sensor signal is used for feature extraction and feature vectors are fed to Markov models trained with...
We consider bit and power allocation in a multicast system based on Orthogonal Frequency DivisionMultiplexing. In this system the base station determines the bit loading for each subchannel and using erasure codes the users are able to obtain the original message if they are able to decode a fraction of sent subchannels. Multicast rate maximization problem in such a system has been recently studied,...
Wireless technologies which are the most important development areas in the twenty-first century and Wireless Body Sensor Networks which are developed for use in health care continues to be the focus on attention of researchers. Wireless Body Sensor Networks are used for monitoring health signals such as body temperature, heart pulse, EEG, and ECG of the people who are old, chronic illness or weak...
This paper introduces a homogeneous Gabor feature based face recognition approach under uncontrolled conditions such as unexpected illumination changes, pose changes, blurring and facial expression changes. The system uses curvature Gabor features instead of conventional Gabor features, and the classifiers are obtained by applying PCLDA to the selected features. By combining some of the obtained classifiers...
This research work proposes a satellite image enhancement system consisting of image denoising and illumination enhancement technique based on dual tree complex wavelet transform (DT-CWT). The technique firstly decomposes the noisy input image into different frequency subbands by using DT-CWT and denoises these subbands by using local adaptive bivariate shrinkage function (LA-BSF) which assumes the...
In this paper a new CMOS realization of ZC-CG-CDBA (Z Copy-Controlled Gain-Current Differencing Buffered Amplifier), a recently published active element, is proposed. In addition, the performance of the circuit designed is demonstrated on a second order single input-three output filter example employing two ZC-CG-CDBA elements. The natural frequency and the quality factor of the filter are adjustable...
In this study, compressed sensing concepts are applied to multi-view video coding. Existing work from single view video is utilized to develop efficient GOP patterns and reference framing for stereo coding. It has been observed that the most typical choice of pattern improved the characteristics 0.4 dB with respect to the model that do not benefit from interview sparsity for all frames. Alternatives...
In this study, a simulation environment has been developed to simulate signal characteristics of both underwater ambient noise and naval vehicles. This simulation environment will be used to develop algorithms for detection and classification of different naval vehicles. In the simulations, the ambient noise is modeled as Gaussian and non-stationary random process. Target radiated noise signals of...
In this work, Symbol Error Probability (SEP) and Outage Probability (OP) expressions for 2×1 and 2×2 Alamouti Space-Time coded Orthogonal Frequency Division Multiplexing (OFDM) signals over Nakagami-m fading channels are derived and validated by simulations. First, the probability density functions (PDF) at the output of antennas are derived, then their moment generating functions are taken to obtain...
In video sequences, some techniques such as frame repetition or linear interpolation for reconstruction of skipped, lost or nonexistent frames within video streams, in an attempt to generate more fluid video sequences and slow motion playback, result in undesirable artifacts, noise and unnatural effects. An effective technique called motion compensated temporal interpolation (MCTI) is used to interpolate...
A P300 speller is designed, that is implemented with Turkish characters. The designed P300 speller is used as a brain computer interface via electroencephalogram (EEG). For this speller, the visual stimulus has been prepared for two different letter placements. The first of these placements, which is very common in the literature, is the square formed letter sequence. The second placement of letters...
The binary quantization method which is used in random projection based biometric hashing systems reduces the authentication performance of these systems. In this paper, we propose new statistical quantization methods for biometric hashing systems. Our proposed quantization methods use Gaussian mixture model and Gaussian distributions to determine quantization threshold value. Therefore, we improve...
The WiMAX which is a technology of OFDM base provides wireless communication from one-point to multi-point. In this study, for fixed and mobile WiMAX systems performance analysis of different modulation types and Zigzag encoder schemes is investigated. One of the important advantages of the error correction codes has no need re-transmission of data packets. The results of proposed Zigzag-coded modulation...
A configuration for the realization of voltage mode second-order filters employing a single second generation inverting current conveyor as the active element is presented. This topology can synthesize lowpass, highpass, bandpass, notch and allpass filtering functions. Theoretical analysis is verified with SPICE simulation results.
Here we consider generic object localization in digital images where the goal is to find a tight bounding box enclosing the instances of object of interest. Traditional object localization methods treat this problem as building a binary classification that distinguishes between the object class and the background. The trained classifier is usually turned into a detector by sliding it across the image...
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