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Mutual usage of vehicles as well as car sharing became more and more attractive during the last years. Especially in urban environments with limited parking possibilities and a higher risk for traffic jams, car rentals and sharing services may save time and money. But when renting a vehicle it could already be damaged (e.g., scratches or bumps inflicted by a previous user) without the damage being...
While the mechanism and scope of cyberspace is progressing on a daily basis, risk factors and the ability to process cyberspace data in less time and using less effort are proving to be major roadblocks to achieve the desired outcomes. The defensive methods currently applied to counter these evolving attacks are not sufficient due to their preventive and reactive nature so an active posture is required...
This paper investigates the evaluation of a spectrum sensing techniques from the point of view of detection degradation caused by the transceiver front-end imperfections. Two spectrum sensing detectors (an energy detector and a goodness of fit detector) have been evaluated with the selected single carrier modulation formats for four different types of front-ends — two of them designed for the currently...
This paper presents the method of graphical data steganographic protection based on binary operations applied to both secret data bits and the most significant bits of a cover image in order to define values of the least significant bits to be embedded into the cover according to LSB-steganography approach. The method demonstrates an appropriate level of robustness against attacks. The secret data...
Biomedical engineering is a unique area that allows fusion between two distinct fields of engineering and medicine. The integration of efforts from both fields promises progress through acquisition of information from tissues, cells, and organs through non-invasive methods of assessment. Here we investigate the ability of a hyperspectral device in extracting data from tissues through the wavelength...
Fundus images are suitable for automatic evaluation in the current clinical practice. The detection and localization of important areas such as the vascular bed, yellow spot (fovea) and optical disc are necessary for following pathological changes detection. After image preprocessing we use very rapid method based on gradients called Fast radial symmetry transform — FRST to find approximately circular...
This paper addresses the orientation estimation in digital images using gradient-based methods. In particular, the second-moment matrix is used to extract the information about the local orientation and the degree of anisotropy in the image, mainly in structured and sinusoid-like textured images. Keeping in mind that the extent of gradient fields smoothing should be decent to extract as faithfully...
This paper describes an implemented solution to automatically detect and recognize in real-time both speed limit warning signs and speed limit signs in railway travel videos recorded from the driver's cab. The lack of available high-quality videos to train this kind of systems and the involved complexity of the rail scenes, with non-controlled illumination conditions, make it challenging the considered...
Recognition of emotions by analyzing the facial expressions has been an important research area in last decade. Existing studies in the literature mostly seek for a classification model that is linking the emotions with the facial expressions that are defined by the basic components of face (such as eyes, mouth, and ear). In this regard, Artificial Neural Networks (ANN) has been a widely employed...
This paper presents work related to tennis stroke detection and classification. For arm movement acquisition a miniature wearable IMU device, positioned on the player's forearm (right above the wrist) is proposed and presented. The device uses a MEMS-based accelerometer and gyroscope with 6-DOF. For reliable and accurate tennis stroke detection the information obtained from the accelerometer data...
Spoken dialog represents a comfortable way of the human-machine cooperation. Dialogue technology is language-dependent due to its relationship to the natural language processing. For a long time, there did not exist any resources for designing advanced dialogue interaction in the Slovak language. Therefore, the new corpus of human-human dialogues started to be prepared. Suitable dialogue interactions...
Mutual information (MI) is a very important concept in medical image registration for a diagnosis. During the past decade, there have been a large number of studies on multimodal image registration. This extensive attention is due to its high performance in terms of accuracy and robustness. However, there are so many different perspectives on MI that have been discussed and proposed during the last...
In recent times there is an increasing number of publications that explore potential of partial differential equations (PDEs) as image compression methods. PDEs are frequently used for interpolation problems even when data is sparse. In PDE-based image compression only a part of data is stored by various sparsification methods while in decompression stage missing data is restored. Goal of the presented...
Automatic detection of fish welfare related parameters is a very important step in the process of aquaculture production control. Poor handling, and lack of control of the state of the biomass in production plants, may lead to various disease outbreaks, chronic stress and physical trauma, which can influence mortality, which is directly related to profit loss. Automated and objective splash detection...
Inspecting the quality of printed texts has its own importance in many industrial applications. To do so, this paper proposes a grading system which evaluates the performance of the printing task using some quality measures for each character and symbols. The purpose of these grading system is two-folded: for costumers of the printing and verification system, the overall grade used to verify if the...
Image mosaicing is a powerful mean for obtaining a larger view of a scene than the available within a human eyes view or compact camera view. Homography matrix is the most suitable transformation model which is needed to create mosaiced images, and the estimation of the parameters of that model using RANSAC (Random Sample Consensus) is a key step in feature matching as it improves the stability of...
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