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Tytuł:
Damage localization in truss girders by an application of the discrete wavelet transform
Autorzy:
Knitter-Piątkowska, Anna
Kawa, Olga
Guminiak, Michał Jan
Powiązania:
https://bibliotekanauki.pl/articles/2204501.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
truss structures
damage localization
finite element method
discrete wavelet transform
konstrukcja kratownicowa
lokalizacja uszkodzeń
metoda elementów skończonych
dyskretna transformata falkowa
Opis:
The paper demonstrates the potential of wavelet transform in a discrete form for structural damage localization. The efficiency of the method is tested through a series of numerical examples, where the real flat truss girder is simulated by a parameterized finite element model. The welded joints are introduced into the girder and classic code loads are applied. The static vertical deflections and rotation angles of steel truss structure are taken into consideration, structural response signals are computed at discrete points uniformly distributed along the upper or lower chord. Signal decomposition is performed according to the Mallat pyramid algorithm. The performed analyses proved that the application of DWT to decompose structural response signals is very effective in determining the location of the defect. Evident disturbances of the transformed signals, including high peaks, are expected as an indicator of the defect existence in the structure. The authors succeeded for the first time in the detection of breaking the weld in the truss node as well as proved that the defect can be located in the diagonals.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 1; art. no. e144581
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factors Influencing the Quality of Digital Game Localization
Autorzy:
Kabát, Marián
Powiązania:
https://bibliotekanauki.pl/articles/41310353.pdf
Data publikacji:
2023
Wydawca:
Univerzita sv. Cyrila a Metoda. Fakulta masmediálnej komunikácie
Tematy:
development
digital games
English
localization
Slovak
variable
Opis:
Software localization is an integral part of a business process as long as a company wants to sell their software products on a global scale. The purpose of the following article is to provide information about some key features of the development and publishing process that have a significant impact on digital game localization from English into Slovak. The selected features are based on a study by M. Kabát on localization aspects of non-gaming software that are here adapted to digital game localization, and on the author’s practical experience. Each key feature is briefly introduced and its impact on digital game localization is described. Where necessary, examples are provided. Other than presenting key features of digital game localization, the intent behind this paper is to spread information on digital game localization as I believe that, e.g., developers should be more informed on this topic to create more effective cooperation with localizers and in that way higher quality localization.
Źródło:
Acta Ludologica; 2023, 6, 1; 84-94
2585-8599
Pojawia się w:
Acta Ludologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Homography augmented particle filter SLAM
Autorzy:
Słowak, Paweł Leszek
Kaniewski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/27311746.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Simultaneous Localization and Mapping
SLAM
homography matrix
particle filter
robot navigation
visual-inertial systems
Opis:
The article presents a comprehensive study of a visual-inertial simultaneous localization and mapping (SLAM) algorithm designed for aerial vehicles. The goal of the research is to propose an improvement to the particle filter SLAM system that allows for more accurate and robust navigation of unknown environments. The authors introduce a modification that utilizes a homography matrix decomposition calculated from the camera frame-to-frame relationships. This procedure aims to refine the particle filter proposal distribution of the estimated robot state. In addition, the authors implement a mechanism of calculating a homography matrix from robot displacement, which is utilized to eliminate outliers in the frame-to-frame feature detection procedure. The algorithm is evaluated using simulation and real-world datasets, and the results show that the proposed improvements make the algorithm more accurate and robust. Specifically, the use of homography matrix decomposition allows the algorithm to be more efficient, with a smaller number of particles, without sacrificing accuracy. Furthermore, the incorporation of robot displacement information helps improve the accuracy of the feature detection procedure, leading to more reliable and consistent results. The article concludes with a discussion of the implemented and tested SLAM solution, highlighting its strengths and limitations. Overall, the proposed algorithm is a promising approach for achieving accurate and robust autonomous navigation of unknown environments.
Źródło:
Metrology and Measurement Systems; 2023, 30, 3; 423--439
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Invisibility of Game Localizers and the Status of Localization in Slovakia
Autorzy:
Koscelníková, Mária
Powiązania:
https://bibliotekanauki.pl/articles/41313216.pdf
Data publikacji:
2023
Wydawca:
Univerzita sv. Cyrila a Metoda. Fakulta masmediálnej komunikácie
Tematy:
digital game credits
game localization
localization training
translator crediting
Opis:
The standard industry practice in publishing or audiovisual translation should be mentioning the translators for their work in the credits. When it comes to technical texts, for example manuals or localized texts such as websites, translators or localizers are hardly ever mentioned, especially when translation agencies provide the entire process of translation or localization. Digital games usually do contain credits listing all people working on a digital game, but such lists tend to leave out translators or localizers. The paper aims to investigate the issue of crediting digital game translators or localizers in Slovak digital games and show different crediting practices. We inspect credits in digital games made by Slovak developers and show different crediting practices in the industry. We examine the use of credits in Slovak digital games and rationalize the situation by looking at the localization of digital games, localization training at Slovak universities, and language support for Slovak digital games. The paper contains reviews of 69 selected computer and mobile device games published by 34 studios or developers.
Źródło:
Acta Ludologica; 2023, 6, 2; 80-91
2585-8599
Pojawia się w:
Acta Ludologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of the acoustic wave scattering on the aircraft surface using the boundary element method
Autorzy:
Nowicki, Dawid
Suder-Dębska, Katarzyna
Czajka, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/24201977.pdf
Data publikacji:
2023
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
sound localization
boundary element method
sound scattering
noise
aircraft
Smart Acoustics
lokalizacja dźwięku
metoda elementów brzegowych
rozproszenie dźwięku
hałas
samolot
Opis:
Sound localization tools are important in the environmental protection and the human searches. The article is one of the stages of the implementation of the concept of using aircraft to localize sound sources. The use of a fixed-wing aircraft instead of a multirotor would increase the total flight time, and expand the surveyed area. It is important to determine the most favourable positions of the receivers on the surface of the aircraft. The scattering effects of the sound waves coming from the ground source and aircraft engine on the acoustic field on the aircraft surface are not homogeneous. In the article the authors present the modelling of the scattering of the sound waves over the airplane surface with the usage of boundary element methods. After determining the effects from the sound source on earth and from the aircraft engine the conclusion was made, that the influence from the engine noise is greater than that from the ground source, and in order to localize the low amplitude signals, the aircraft need to glide. Considering only the effects of the ground source, the optimal areas for the microphones placement were determined.
Źródło:
Vibrations in Physical Systems; 2023, 34, 1; art. no. 2023107
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Node Localization based on Anchor Placement using Fuzzy C-Means in a Wireless Sensor Network
Autorzy:
Irid, Sidi Mohammed Hadj
Hadjila, Mourad
Hachemi, Mohammed Hicham
Souiki, Sihem
Mosteghanemi, Reda
Mostefai, Chaima
Powiązania:
https://bibliotekanauki.pl/articles/2200723.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
WSN
localization algorithm
anchors
GM-SDP-2
WLS
CRLB
Fuzzy C-Means
RMSE
CDF
Opis:
Localization is one of the oldest mathematical and technical problems that have been at the forefront of research and development for decades. In a wireless sensor network (WSN), nodes are not able to recognize their position. To solve this problem, studies have been done on algorithms to achieve accurate estimation of nodes in WSNs. In this paper, we present an improvement of a localization algorithm namely Gaussian mixture semi-definite programming (GM-SDP-2). GMSDP is based on the received signal strength (RSS) to achieve a maximum likelihood location estimator. The improvement lies in the placement of anchors through the Fuzzy C-Means clustering method where the cluster centers represent the anchors’ positions. The simulation of the algorithm is done in Matlab and is based on two evaluation metrics, namely normalized root-mean-squared error (RMSE) and cumulative distribution function (CDF). Simulation results show that our improved algorithm achieves better performance compared to those using a predetermined placement of anchors.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 1; 99--104
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance Comparison of Several Algorithms for Localization of Wideband Sources
Autorzy:
Ougraz, Hassan
Safi, Said
Boumezzough, Ahmed
Frikel, Miloud
Powiązania:
https://bibliotekanauki.pl/articles/24200743.pdf
Data publikacji:
2023
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
coherent
DOA estimation
incoherent
localization
wideband sources
Opis:
In recent years, researchers have tried to estimate the direction-of-arrival (DOA) of wideband sources and several novel techniques have been proposed. In this paper, we compare six algorithms for calculating the DOA of broadband signals, namely coherent subspace signal method (CSSM), two-sided correlation transformation (TCT), incoherent multiple signal classification (IMUSIC), test of orthogonality of frequency subspaces (TOFS), test of orthogonality of projected subspaces (TOPS), and squared TOPS (S-TOPS). The comparison is made through computer simulations for different parameters, such as signal-to-noise ratio (SNR), in order to establish the efficiency and performance of the discussed methods in noisy environments. CSSM and TCT require initial values, but the remaining approaches do not need any preprocessing.
Źródło:
Journal of Telecommunications and Information Technology; 2023, 3; 21--29
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Datenerhebung im Lokalisierungsprozess von Computerspielen – zur Vorbereitung einer Studie
On data collection in the process of computer game localization: On preparation of a study
Autorzy:
Michoń, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/53367489.pdf
Data publikacji:
2022-12-11
Wydawca:
Oficyna Wydawnicza ATUT – Wrocławskie Wydawnictwo Oświatowe
Tematy:
translation process
eye tracking
game localization
source text
CAT
multimodality
Opis:
The paper aims to describe the current methods in process-oriented research of translation and to show the distinctive nature of computer game localization. A localization assignment confronts the translator with multi-modal material. On the one hand, it means concentration on the verbal content, but on the other hand this verbal layer and other semiotic channels interpenetrate one another and need to be taken into account together as equally important parts of the communicational goal. The paper evaluates the technical instruments and methods of translation process analysis. The study of such instruments and methods should be conducted in an environment that is as neutral and as close to the reality of the translation process as possible, with access to common tools used by translators, including digital sources and computer-bound translation aids. The translation process research data available today give an overview of the methods used for observing the steps in the process, the decisions made by the translators and the usability of their tools. The research focus here is on the decision making and perception in the transfer of verbal content to the multisemiotic and transmedia context. The examples provided in the paper refer to the specific problems encountered in the author’s pilot study simulating a translation task aimed at localizing narration and dialogues for a popular computer game that has been very successful worldwide.
Źródło:
Studia Translatorica; 2022, 13; 147-159
2084-3321
2657-4802
Pojawia się w:
Studia Translatorica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exploring potential drivers of innovation-related activities in Poland: evidence from Polish business clusters
Autorzy:
Kuczewska, Joanna
Tomaszewski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/22443142.pdf
Data publikacji:
2022
Wydawca:
Instytut Badań Gospodarczych
Tematy:
clusters
cooperation
innovativeness
cluster leader
cluster localization
Partial Least Squares-Structural Equation Modelling
PLS-SEM
Opis:
Research background: Innovations are introduced by competitive companies. One of the most common methods, increasingly used by companies, is organizing clusters or cluster initiatives operating within a specialized sector, competing with each other, exploiting the potential of cooperation and its impact on creating new business ideas. However, these efforts could be unviable due to the lack of an effective leader of the group. One should underline a crucial role of the leader in such an organized network, since the leader makes improvements and takes initiatives for all the network and its partners. These concepts prompt us to undertake the research on the role of clusters? characteristics on enhancing willingness to innovate in general. This study aims to point out the main characteristics of clusters and to investigate their impact on companies? innovativeness. The main problem to address is the magnitude of specific effects that might boost introducing new solutions in firms? networks. Purpose of the article: The purpose of this study is to investigate the impact of factors describing cluster environment (characteristics like cooperation within clusters and beyond them, incentives of a leader, and localization factors) that might affect the innovativeness of companies. Methods: The authors collected data using questionnaire. This type of primary source enables the authors to construct a model consisting of latent variables such as incentives of coordinator of cluster or cluster initiative, cooperation of firms with local authorities, cooperation between entrepreneurs, or localization. The results are subject to the Structural Equation Modelling (SEM) analysis. Findings & value added: The conducted analysis leads to several findings. Firstly, incentives provided by the cluster coordinator enable companies to increase the willingness to introduce innovations in general. Secondly, however, the influence of other cluster characteristics on the propensity to innovate for firms functioning within specific Polish business clusters is scant. These findings point to the fact that actions leading to assign the official coordinator of a cluster need to be done, as it should result in better flow of knowledge, more symmetric information among companies within cluster, and more productive and innovative way of functioning firms in general. Regarding innovation clusters (and regional innovation systems), these actions need to be supported by forming policy on regional level, because effective clusters would induce more competitive regional economy in long-term scenario.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2022, 17, 3; 775-801
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
History of video game localization in Poland
Autorzy:
Kudła, Dominik
Powiązania:
https://bibliotekanauki.pl/articles/53366583.pdf
Data publikacji:
2022-12-11
Wydawca:
Oficyna Wydawnicza ATUT – Wrocławskie Wydawnictwo Oświatowe
Tematy:
video game localization
video games in Poland
localization into Polish
video game distribution
Opis:
The primary focus of the present article is the development of practices aimed at creating new language versions of video games in Poland. The historical outline concentrates on various forms that video game localization practices took throughout the years and juxtaposes them with global localization trends. Firstly, the initial attempts in the 1980s are discussed. Some of those projects were just adaptations of video games developed outside Poland and were not officially called localizations. Next, the first official distributing companies in Poland of the 1990s are described. The topic of gaming magazine articles which in the final decade of 20th century resembled user manuals is also discussed. Then the focus is on the first official localizations involving voice acting. After that, the process of illegal video game localization in Poland is discussed with the multifarious forms it took, the manners of combatting this phenomenon and a variety of examples. Later the turn of the centuries is depicted. This period witnessed numerous successful Polish localizations, which were prepared with considerable attachment to the quality of translation. The first decade of 21st century was the time when most Polish localization companies were established. The change of localization approach at the beginning of the second decade of the 21st century is discussed further. The 2010s provided more examples for partial localizations. The possible reasons for such an approach are also provided. However, these were also the times of a constantly growing number of English localizations of games developed in Poland. Subsequently, the discrepancy between the localizations commissioned by larger and independent companies are compared. Finally, the developments of the early 2020s are shown.
Źródło:
Studia Translatorica; 2022, 13; 127-146
2084-3321
2657-4802
Pojawia się w:
Studia Translatorica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Localization of sound sources in binaural reproduction of first and third order ambisonics
Autorzy:
Sagasti, Amaia
Pietrzak, Agnieszka Paula
Martin, Ricardo
Eguinoa, Rubén
Powiązania:
https://bibliotekanauki.pl/articles/2202425.pdf
Data publikacji:
2022
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
ambisonics
localization
spatial audio
listening tests
ambisonia
lokalizacja
dźwięk przestrzenny
testy słuchania
Opis:
The use of higher-order ambisonics in spatial sound recordings makes it possible to increase the accuracy of recording information about the direction from which the sound comes to the listener. However, with binaural ambisonic sound reproduction, the listener's ability to locate the sound source accurately may be limited. This paper presents a comparison of the listener's ability to locate a sound source during binaural listening to recordings made with first and third order ambisonic microphones. The analysis was carried out for two types of signal: pink noise and ringing sound. The analysis of localization errors depending on the ambisonics order, azimuth and elevation angles as well as the type of signal is presented. The obtained data indicate that in binaural reproduction of the ambisonic sound the localization errors in the azimuth plane were smaller for the third order ambisonics, compared to the first order. In the elevation plane both for first and third order the errors were significant.
Źródło:
Vibrations in Physical Systems; 2022, 33, 2; art. no. 2022214
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microphone Based Acoustic Vector Sensor for Direction Finding with Bias Removal
Autorzy:
Wajid, Mohd
Kumar, Arun
Bahl, Rajendar
Powiązania:
https://bibliotekanauki.pl/articles/2141636.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acoustic measurements
acoustic sensor
acoustic vector sensor
direction-of-arrival estimation
finite element analysis
microphones
particle velocity
sound source localization
Opis:
The acoustic vector sensor (AVS) is used to measure the acoustic intensity, which gives the direction-of-arrival (DOA) of an acoustic source. However, while estimating the DOA from the measured acoustic intensity the finite microphone separation (d) in a practical AVS causes angular bias. Also, in the presence of noise there exists a trade off between the bias (strictly increasing function of d) and variance (strictly decreasing function of d) of the DOA estimate. In this paper, we propose a novel method for mitigating the angular bias caused due to finite microphone separation in an AVS. We have reduced the variance by increasing the microphone separation and then removed the bias with the proposed bias model. Our approach employs the finite element method (FEM) and curves fitting to model the angular bias in terms of microphone separations and frequency of a narrowband signal. Further, the bias correction algorithm based on the intensity spectrum has been proposed to improve the DOA estimation accuracy of a broadband signal. Simulation results demonstrate that the proposed bias correction scheme significantly reduces the angular bias and improves the root mean square angular error (RMSAE) in the presence of noise. Experiments have been performed in an acoustic full anechoic room to corroborate the effect of microphone separation on DOA estimation and the efficacy of the bias correction method.
Źródło:
Archives of Acoustics; 2022, 47, 2; 151-167
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Position Estimation in Mixed Indoor-Outdoor Environment Using Signals of Opportunity and Deep Learning Approach
Autorzy:
Urwan, Sebastian
Wysocka, Dominika R.
Pietrzak, Alicja
Cwalina, Krzysztof K.
Powiązania:
https://bibliotekanauki.pl/articles/2134050.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
radiolocalization
deep neural network
hybrid localization
Opis:
To improve the user’s localization estimation in indoor and outdoor environment a novel radiolocalization system using deep learning dedicated to work both in indoor and outdoor environment is proposed. It is based on the radio signatures using radio signals of opportunity from LTE an WiFi networks. The measurements of channel state estimators from LTE network and from WiFi network are taken by using the developed application. The user’s position is calculated with a trained neural network system’s models. Additionally the influence of various number of measurements from LTE and WiFi networks in the input vector on the positioning accuracy was examined. From the results it can be seen that using hybrid deep learning algorithm with a radio signatures method can result in localization error 24.3 m and 1.9 m lower comparing respectively to the GPS system and standalone deep learning algorithm with a radio signatures method in indoor environment. What is more, the combination of LTE and WiFi signals measurement in an input vector results in better indoor and outdoor as well as floor classification accuracy and less positioning error comparing to the input vector consisting measurements from only LTE network or from only WiFi network.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 3; 594-607
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on Airflow Background Noise Suppression for Aeroacoustic Wind Tunnel Testing
Autorzy:
Li, Yuanwen
Li, Min
Feng, Daofang
Yang, Debin
Wei, Long
Powiązania:
https://bibliotekanauki.pl/articles/2141671.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aeroacoustic measurement
acoustic source localization
EEMD; background noise suppression
wind tunnel test.
Opis:
The microphone data collected in aeroacoustic wind tunnel test contains not only desired aeroacoustic signal but also background noise generated by the jet or the valve of the wind tunnel, so the desired aeroacoustic characteristics is difficult to be highlighted due to the low Signal-to-Noise Ratio (SNR). Classical cross spectral matrix removal can only reduce the microphone self-noise, but its effect is limited for jet noise. Therefore, an Airflow Background Noise Suppression method based on the Ensemble Empirical Mode Decomposition (ABNSEEMD) is proposed to eliminate the influence of background noise on aeroacoustic field reconstruction. The new method uses EEMD to adaptively separate the background noise in microphone data, which has good practicability for increasing SNR of aeroacoustic signal. A localization experiment was conducted by using two loudspeakers in wind tunnel with 80 m/s velocity. Results show that proposed method can filter out the background noise more effectively and improve the SNR of the loudspeakers signal compared with spectral subtraction and cepstrum methods. Moreover, the aeroacoustic field produced by a NACA EPPLER 862 STRUT airfoil model was also measured and reconstructed. Delay-and-sum beamforming maps of aeroacoustic source were displayed after the background noise was suppressed, which further demonstrates the proposed method’s advantage.
Źródło:
Archives of Acoustics; 2022, 47, 2; 241-257
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Samolokalizacja bezzałogowego statku powietrznego uwzględniająca zmienną orientację kamery
Self-Localization of the Unmanned Aerial Vehicle Taking Into Account the Variable Orientation of the Camera
Autorzy:
Zielińska, Teresa
Pogorzelski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2174232.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
lokalizacja wizyjna
orientacja kamery
redundancja GNSS
porównywanie obrazów
vision localization
camera orientation
GNSS redundancy
image comparison
Opis:
W niniejszej publikacji zaproponowano metodę lokalizacji wizyjnej z wykorzystaniem obrazów z symulowanej kamery oraz mapy georeferencyjnej. Model BSP oraz symulacja lotu zostały wykonane w pakiecie MATLAB Simulink, który przesyłał dane dotyczące orientacji BSP do opisywanego programu. Wizualizacja obrazu z kamery została wykonana w czasie rzeczywistym przy pomocy oprogramowania FlightGear, której obraz również był przechwytywany przez program NW. Metoda ta realizowana jest przez dwa procesy w dwu modułach: Global Positioning Component oraz Motion Positioning Component. Pierwszy z nich porównuje obraz z symulowanej kamery z ortofotomapą. Drugi wyznacza pozycję na podstawie oceny przemieszczenia punktów charakterystycznych w obrazie w stosunku do ostatnio znanej lokalizacji. Wynik działania obu modułów ilustrowany jest w oknie graficznym aplikacji NW, co pozwala na wizualne porównanie uzyskanych wyników. W przypadku globalnej metody lokalizacji wymagana jest dodatkowa korekcja orientacji kamery w celu wyznaczenia pozycji w przestrzeni 2D. W tym celu wykorzystano dane dotyczące bieżącej orientacji kamery wyrażone w kwaternionach. Pozwoliło to na wprowadzenie poprawki pozycji, co znacząco poprawiło dokładność wyniku uzyskiwanego w module GPC mimo znacznych przechyleń BSP podczas symulowanego lotu.
This publication proposes a visual localization method using images from a simulated camera and a georeferenced map. The UAV model and flight simulation were made in the MATLAB Simulink package, which sent UAV orientation data to the described program. The visualization of the camera image was performed in real time using the FlightGear software, the image of which was also captured by the NW program. This method is performed by two processes in two modules: Global Positioning Component and Motion Positioning Component. The first one compares the image from the simulated camera with the orthophotomap. The second determines the position based on the assessment of the displacement of characteristic points in the image in relation to the last known location. The result of the operation of both modules is illustrated in the graphic window of the NW application, which allows for a visual comparison of the obtained results. With the global method of location, additional camera orientation correction is required to determine the position in 2D space. For this purpose, data on the current camera orientation expressed in quaternions were used. This allowed for the introduction of a position correction, which significantly improved the accuracy of the result obtained in the GPC module despite significant UAV tilts during the simulated flight.
Źródło:
Pomiary Automatyka Robotyka; 2022, 26, 4; 53--59
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 267

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