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Klaipeda, Lithuania

Artemciukas E.,Klaipeda University | Artemciukas E.,Klaipeda State College | Plestys R.,Klaipeda University | Andziulis A.,Klaipeda University | And 5 more authors.
Elektronika ir Elektrotechnika | Year: 2012

Real-time control and monitoring systems uses sensors (accelerometers and gyroscopes), that can be applied to design inertial mouse, object tracking, motion sensing, stabilization and other systems. In order to acquire high system accuracy, most of the implementations demands huge real-time computing. Therefore, the prototype of real-time control system was designed using sensor fusion algorithm that ensures accurate various systems controls with minimal computing resources. Accelerometer data read and accelerometer with gyroscope fusion algorithm results were compared and simple 3D visualization was presented to verify and visually demonstrate the efficiency of proposed real-time control system prototype. © Kauno technologijos universitetas, 2012.

Ruzgiene B.,Vilnius Gediminas Technical University | Ruzgiene B.,Klaipeda State College | Bagdziunaite R.,Vilnius Gediminas Technical University | Ruginyte V.,Zemaitija College
Geodesy and Cartography | Year: 2012

For scanning analog aerial photographs, digital photogrammetry requires specific and expensive photogrammetric scanners. However, we only have a simple A4 format scanner useful for solving some special photogrammetric tasks applied for analyzing the possibilities of scanning photographic material. The paper investigates the peculiarities of scanning analog aerial photos using the scanner processing pictures smaller than an A4 format. The achieved results are compared with digital data obtained using a professional photogrammetric scanner. Experimental photogrammetric measurements have showed that the results of aerial photographs scanned by a nonprofessional scanner satisfy accuracy requirements for topographic mapping at a scale of 1:5000. © 2012 Copyright Vilnius Gediminas Technical University (VGTU) Press Technika.

Ruzgiene B.,Vilnius Gediminas Technical University | Ruzgiene B.,Klaipeda State College | Aksamitauskas C.,Vilnius Gediminas Technical University | Daugela I.,UAB InfoEra | And 3 more authors.
Baltic Journal of Road and Bridge Engineering | Year: 2015

Recently, the interest of Unmanned Aerial Vehicle application in photogrammetric environment for roads observation and monitoring has increased in many countries, in Lithuania as well. The experimental object for demonstration of capability and efficiency of aerial vehicle-based remote sensing technology for road data collection was a western bypass of Vilnius. The platform of the model UX5 Trimble with mounted camera Sony NEX-5R was applied for gaining images. The implemented means are mobile and not expensive. Photogrammetric technique with software package Business Center Photogrammetry Module was applied for the modelling of images. The correctness of digital surface model generally depends on camera resolution, flight height and accuracy of ground control points. The coordinates of control points were determined using Global Positioning System Trimble R4. Paper demonstrates results of a new technology application possibilities for linear object (road) mapping and accuracy evaluation of spatial models. The road points positioning accuracy investigation was carried out in consideration with geodetic control measurements. The average root mean square error for the points coordinates is 2.94 cm, and standard deviations – 2.78 cm. Analyzing coincidence or mismatches of Vilnius western bypass project data with photogrammetric product, not significant discrepancies of road section features were determined. The cost consideration of Unmanned Aerial Vehicle in conjunction with photogrammetry employment at experimental object is presented. © 2015 Vilnius Gediminas Technical University (VGTU) Press Technika.

Banaitiene N.,Vilnius Gediminas Technical University | Banaitis A.,Vilnius Gediminas Technical University | Laucys M.,Klaipeda State College
Journal of Civil Engineering and Management | Year: 2015

In the construction industry of the Baltic States, the aftermath of the economic crisis poses new questions as to what occasioned the crisis. The paper analyses a causal relationship between foreign direct investment in construction (CFDI) and the contribution of the construction industry to gross domestic product (GDP) using data obtained in the Baltic States (Lithuania, Latvia and Estonia) for the period from 2000 to 2011. The conducted research includes the initial econometric analysis of variables, which involves the verification of seasonality and stationarity with the help of time series plots, a unit root test and Granger causality test. The study has found that, in the case of Lithuania and Estonia, CFDI is not the Granger cause of the construction industry's contribution to GDP growth; conversely, value added by the construction sector is not the Granger cause of FDI into the sector, and there is one-way causality from value added by the construction sector to CFDI, and the construction industry's contribution to GDP does not influence CFDI in Latvia. Copyright © 2015 Vilnius Gediminas Technical University (VGTU) Press.

Ruzgiene B.,Vilnius Gediminas Technical University | Xiang Q.Y.,Klaipeda State College | Xiang Q.Y.,Soochow University of China | Gecyte S.,Vilnius Gediminas Technical University
Geodesy and Cartography | Year: 2011

The rectification of high resolution digital aerial images or satellite imagery employed for large scale city mapping is modern technology that needs well distributed and accurately defined control points. Digital satellite imagery, obtained using widely known software Google Earth, can be applied for accurate city map construction. The method of five control points is suggested for imagery rectification introducing the algorithm offered by Prof. Ruan Wei (Tong Ji University, Shanghai). Image rectification software created on the basis of the above suggested algorithm can correct image deformation with required accuracy, is reliable and keeps advantages in flexibility. Experimental research on testing the applied technology has been executed using GeoEye imagery with Google Earth builder over the city of Vilnius. Orthophoto maps at the scales of 1:1000 and 1:500 are generated referring to the methodology of five control points. Reference data and rectification results are checked comparing with those received from processing digital aerial images using a digital photogrammetry approach. The image rectification process applying the investigated method takes a short period of time (about 4-5 minutes) and uses only five control points. The accuracy of the created models satisfies requirements for large scale mapping. © 2011 Vilnius Gediminas Technical University (VGTU) Press Technika.

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