The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Automatic iris recognition is becoming increasingly important technique for identity management and hence security. In the computer vision domain and mainly in the image recognition applications, the possibility to compare affined images, which could be distinguished just through small differences, is highly important. Using local image descriptors, similar images could be identified, although they...
Many studies have been made in order to propose automatic diagnostic in medical fields. This paper proposes a new approach to deal with the problem of spectral clustering for signal extracted from brain MRI images. The tool-chain developed during this study can be easily implemented for the extraction and the analysis of information from perfusion MRI. In order to prove this, a reliable program which...
Visual matching is essential in Bags-of-Words model based image retrieval, in which two descriptors are considered as a match pair only if they are quantized to the identical visual word. Considering some defects of SIFT descriptor itself, coupled Multi-Index (c-MI) is firstly proposed, in which color feature is extracted as the mean vector of each pixel in according local patch proportional to scale...
This paper presents a comprehensive security framework designed for vehicular ad hoc networks (VANETs) to address problems related to traffic efficiency and public transport operations. The framework includes mechanisms for exchanging messages in a secured manner. Additionally, it provides means to monitor and to secure routing protocols, as well as to detect and remove untrusted nodes from the network.
Transparent objects play important roles in different sectors, e.g., they are employed in high precision optical systems or to guide laser beams in surgery. Hence, transparent materials have to meet high quality requirements. However, most of the existing elaborated automated inspection approaches are not applicable for the inspection of transparent materials—especially with respect to scattering...
Deep venous thrombosis (DVT) occurs when a blood clot appear within a deep vein, usually in the legs. The main complication is pulmonary embolism (PE) which is the third cause of vascular death after myocardial infarction and cardiovascular event. DVT onset is multifactorial (immobilization, surgery, age, cancers, genetic variations) and it is mostly diagnosed via ultrasound. In our project, we are...
In this paper, we focus on the 3D SC model reconstruction from data with wide azimuthal aperture at a single elevation. Since the existing method is difficult to implement for high-frequency signal or large-size target, we propose a novel method to solve this problem. In our approach, the 3D positions of the SCs are estimated from the 1D SCs via a randomized Hough transform (RHT) method. Then the...
Gait analysis is an important research field in neurodegenerative disease diagnosis. Various IMU-based and vision-based methods have been developed for measuring joint angles during walking process. Dynamic Vision Sensor (DVS) is a neuromorphic engineering product which outputs sequences of events describing the level of brightness change at the pixel level in an asynchronized manner, instead of discrete...
This paper describes a new method to extract rotation invariant local features. The features are invariant not only to a global rotation but also to a local rotation. In addition, a similar trademark retrieval system is proposed, which is based on the rotation invariant local features. By experiment, it is shown that we can find the similar trademark with high probability by checking only higher ranked...
The presented work approaches the topic of method development for automated feature extraction and ECG analysis. The MATLAB-based toolbox ecgFEAT (ECG Feature Extraction and Analysis Toolbox) includes a comprehensive set of algorithms to extract temporal, morphological and statistical information for time analysis and heart rate variability (HRV) analysis. The implemented feature extraction concept...
The possibility of detecting Alzheimer's Disease (AD) was examined using the pupil light reflex (PLRs). PLRs for chromatic stimuli were recorded for 14 AD patients and 21 healthy participants, and some features of the waveform shapes in their PLRs were extracted. Though there were no significant differences in the features between the two participant groups, most healthy participants were predicted...
In this paper a new method for information hiding in club music is introduced. The method called StegIbiza is based on using the music tempo as a carrier. The tempo is modulated by hidden messages with a 3-value coding scheme, which is an adoption of Morse code for StegIbiza. The evaluation of the system was performed for several music samples (with and without StegIbiza enabled) on a selected group...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.