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Steganography is the art of dissimulating information into a digital signal like audio, image, or video. It is the technique of hiding secret data into a carrier to convey messages. Digital images are one of the media that is suitable to convey messages due to several reasons. Firstly, digital images are often transmitted over the Internet which would arouse little suspicion. Secondly, the high correlation...
The recognition of an expression seems obvious and easy when classified by the human brain. However, it is clearly difficult for a computer to detect human face, extract all of the components characterizing the facial expression and then determine its classification from a single image. Moreover, based on videos, the process becomes even more complex because it must take simultaneously into account...
SMEs are the growth engine of a developing country's economy. It is actively contributing to GDP and employment. In consequence, SMEs financing support, ICT adoption promotion and SME's favorable evolution environment creation by policy makers, help reduce the digital divide in this era of the knowledge economy. High penetration and lower costs of Internet connectivity, Web technologies standardization,...
Ensuring an acceptable Quality of Experience (QoE) for all users is a fundamental requirement to the economical development of the Massively Multiplayers Online Gaming (MMOG) companies. However, the high load variability of such MMOG services makes hard to satisfy a good QoE. This paper aims to contribute to this effort, by proposing a proactive dynamic provisioning approach which predicts future...
Indoor localization has been an active research field for decades. Location determination is normally accomplished using the Global Positioning System (GPS) for outdoor environment. For indoor environment GPS does not work due to the lack of the sight line to satellite. Several technologies are deployed to construct an efficient indoor positioning system. A compromise between cost, accuracy and time...
60 GHz suffers from high free space loss which limits the area coverage to few meters. The increasing demand of large area coverage and high broadband wireless connection make Radio over Fiber (RoF) and Multiple Input and Multiple Output (MIMO) antennas a promising solution. In order to combine these technologies, we have proposed in this paper a 2×2 MIMO RoF architecture at 60 GHz. The MIMO system...
In this paper, we introduce a novel edge directed image detail preserving impulse noise removal algorithm. Our approach is based on local image directionality features. Local edge features are analysed on both a downsampled version of the image and the noisy image, and both soft an sharp edges are considered for selective noise removal. Experimental results on a set of standard images show our technique...
Compatibility of GNSS systems becomes an important issue. The most complex factors, which influence this compatibility, are signal structure and mutual interference between the several GNSS systems signals, caused by the finite satellite navigation spectrum.
Automatic detection of human in a video sequence is a canonical instance of object detection. It's considered as a nonrigid object; it has many appearances at different perspectives. Different approaches are used by several methods to combine what is specific to the pedestrian detection, and what is common to the object recognition. A robust solution to this problem would have numerous applications...
In this article, we present a modeling of Direct Torque Control to improve the whole inconvenient by a system with discrete events, which is used to control asynchronous machines. This model is designed through the description of three-phase to two-phase transformation, torque and flux estimator, stator flux comparator, stator flux position detector, switching table and machine model. The complications...
Polar codes are proven capacity-achieving and are shown to have equivalent or even better finite length performance than turbo/LDPC codes under some improved decoding algorithm over the Additive White Gaussian Noise (AWGN) channels. Polar coding is based on the so-called channel polarization phenomenon induced by a transform over the underlying binary-input channel. The channel polarization is found...
This paper presents the implementation of an adaptive contour detection filter and tumor Characterization on field programmable gate array (FPGA) using a combination of hardware and software components. The proposed system locates contours from a calculation of Gradient in preferred directions while quantifying the importance of the outline with a wise thresholding. The dedicated algorithm is implemented...
Long Term Evolution (LTE) is spreading and becoming the dominant cellular networking technology. This revolution of telecommunication network implementation methodology from its circuit-switched pattern towards a packet-switched network that resembles the ordinary packet-based networks, like Internet. Moreover, cellular network operators have adopted a new mechanism, in order to handle voice calls...
In this paper, we apply the bag of features method to the car make and model recognition problem. In our implementation of the method, we use the LARS algorithm to optimize the quadratic problem known as the Lasso and by doing so we generate the dictionary of words. That dictionary is then used in conjuction to an image database to obtain a feature vector (each image yields one feature vector), said...
This paper purposes to present a sensorless indirect field oriented control (IFOC) commanded by a space vector algorithm (SV) in goal to guarantee fast response in one hand, and to improve the dynamic performance of a three-phase squirrel cage induction motor drive (SCIM) in the other hand. This numerical algorithm is used by the pulse width modulation (PWM) in order to obtain a control sequence of...
This paper presents the design of Novel Dielectric Resonator Antenna (NDRA) feed by a micro-strip line for anti-collision radar SRR application at 24 GHz. The proposed NDRA operates at a frequency of 24 GHz with a dielectric constant of 18. The simulated NDRA has a high gain (12.24 dB) and a high radiation efficiency (94 %). The return loss, radiation pattern and gain of the proposed antenna are evaluated...
Expectations and requirements for wireless communication systems continue to grow rapidly. Reliability is one of the most challenging criterions. Soft combined turbo codes technique aims to improve the error correction capability of turbo codes by using soft combining principle, at bit level, inside the turbo decoder. In particular, this approach is based on weight factors which are key elements that...
This paper describes the development of 4×4 wideband compact Butler matrix operating between 1.6 GHz and 2.4 GHz. In order to attain wideband characteristics, the matrix uses microstrip-slot technology, which involves two microstrip dielectric layers with a shared ground plane and a coupling slot. The multilayer beamforming network design is compact in size and avoids the use of crossovers, which...
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