Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "three dimensional reconstruction" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-7 z 7
    Tytuł:
    Three-dimensional reconstruction and morphometric analysis of the mandible in Van cats: A computed tomography (CT) study
    Autorzy:
    Yilmaz, O.
    Demircioglu, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087193.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    computed tomography
    mandible
    morphometry
    three-dimensional reconstruction
    Van cat
    Źródło:
    Polish Journal of Veterinary Sciences; 2021, 24, 2; 261-270
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    3D object shape reconstruction from underwater multibeam data and over ground LiDAR scanning
    Autorzy:
    Kulawiak, M.
    Łubniewski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/260564.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    multibeam sonar
    laser scanning
    three dimensional reconstruction
    point cloud
    triangulation
    Opis:
    The technologies of sonar and laser scanning are an efficient and widely used source of spatial information with regards to underwater and over ground environment respectively. The measurement data are usually available in the form of groups of separate points located irregularly in three-dimensional space, known as point clouds. This data model has known disadvantages, therefore in many applications a different form of representation, i.e. 3D surfaces composed of edges and facets, is preferred with respect to the terrain or seabed surface relief as well as various objects shape. In the paper, the authors propose a new approach to 3D shape reconstruction from both multibeam and LiDAR measurements. It is based on a multiple-step and to some extent adaptive process, in which the chosen set and sequence of particular stages may depend on a current type and characteristic features of the processed data. The processing scheme includes: 1) pre-processing which may include noise reduction, rasterization and pre-classification, 2) detection and separation of objects for dedicated processing (e.g. steep walls, masts), and 3) surface reconstruction in 3D by point cloud triangulation and with the aid of several dedicated procedures. The benefits of using the proposed methods, including algorithms for detecting various features and improving the regularity of the data structure, are presented and discussed. Several different shape reconstruction algorithms were tested in combination with the proposed data processing methods and the strengths and weaknesses of each algorithm were highlighted.
    Źródło:
    Polish Maritime Research; 2018, 2; 47-56
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement of agglomerate shape using three-dimensional reconstruction based on a laser displacement sensor
    Autorzy:
    Zavala De Paz, J. P.
    Castillo Castañeda, E.
    Soto Herrera, J.
    Turchiuli, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/220899.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    agglomerated particles
    laser displacement sensor
    shape parameters
    three-dimensional reconstruction
    Opis:
    The agglomeration of particles is a process that modifies the physical properties of a product originally manufactured as a powder. During milk powder agglomeration of fluidized bed, resulting agglomerates are sufficiently porous to improve the solubility of the final product but, at the same time, their rigidity decreases and agglomerates can be destroyed during packing. The porosity and rigidity properties depend on both the volume and shape characteristics of the agglomerates. This paper presents a three-dimensional reconstruction technique based on a laser displacement sensor (LDS) applied to characterize milk agglomerates. This technique allows three-dimensional scanning to estimate particle volume and extract shape parameters such as: sphericity, elongation and flatness ratio, shape factor and aspect ratio. This technique was implemented using a mechatronic device with two degrees of freedom. The device is composed of an angular positioning system to rotate the agglomerate and a linear positioning system to displace the LDS. Experimental result allows agglomerates classification according to shape parameters.
    Źródło:
    Metrology and Measurement Systems; 2013, 20, 3; 407-418
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A comparative cytological and morphometric analysis of vacuolation in central tissue of the effective and ineffective pea [Pisum sativum L.] root nodules
    Autorzy:
    Borucki, W
    Powiązania:
    https://bibliotekanauki.pl/articles/56613.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    cytological observation
    vacuole
    botany
    central tissue
    vacuolation
    pea
    infected cell
    Pisum sativum
    three-dimensional reconstruction
    morphometric analysis
    root nodule
    Opis:
    Vacuoles play very important physiological roles in plant cells. Pea root nodules, which exhibit distinct zonation (meristematic zone and central tissue zones), may serve as a good experimental model for the investigations of vacuole development and its importance to cell and tissue functioning. Moreover, the nodule central tissue is composed of both infected and uninfected cells which play different physiological roles and differ in the level of vacuolation. Cytological observations revealed that central vacuoles of the infected cells of the effective nodules expand toward cell walls. Thus only thin layers of the cytoplasm separate each central vacuole from plasma membrane and cell wall. This finding is discussed from the viewpoint of improved exchange of solutes and water between the central vacuole and apoplast of the infected cell. Three-dimensional reconstruction of the vacuoles of infected cells within a fragment of effective nodule central tissue, showed their spatial arrangement. Possible advantages coming from the spatial arrangement of vacuoles within the central tissue are discussed. A comparative study of the central tissue (bacteroidal tissue) and meristem vacuolation of the effective and ineffective pea root nodules is also presented. Morphometric measurements revealed that the effective nodule central tissue was more vacuolated than the ineffective one. It was proved that maturation of the infected cells involves dynamic changes in their vacuolation. Having numerous fixing nitrogen bacteroids, the infected cells of effective central tissue were less vacuolated than uninfected cells. On the other hand, both infected and uninfected cells of the effective central tissue showed a much higher level of vacuolation in nitrogen-fixing zone than cells of the same type in ineffective tissue. These results indicate that vacuolation is an important factor in development and functioning of pea root nodule central tissue.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2007, 76, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elektrodiagnostyka i diagnostyka obrazowa serca w Laboratorium Biocybernetyki
    Electrodiagnostics and image diagnostics of the heart in Biocybernetics Laboratory
    Autorzy:
    Pięciak, T.
    Augustyniak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/274617.pdf
    Data publikacji:
    2011
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    elektrokardiogram
    telemedycyna
    zdalny nadzór
    systemy rozproszone
    obrazowanie medyczne
    segmentacja obrazów
    trójwymiarowa rekonstrukcja
    telemedicine
    remote monitoring
    distributed systems
    medical imaging
    image segmentation
    three-dimensional reconstruction
    Opis:
    Artykuł przedstawia bieżące zagadnienia i problematykę poruszaną w ramach prac Laboratorium Biocybernetyki AGH w obrębie elektrodiagnostyki i diagnostyki obrazowej serca i naczyń. Zaprezentowano ideę przenośnego rejestratora EKG z adaptacyjną wymianą oprogramowania w zakresie automatycznej interpretacji elektrokardiogramu. Rozszerzeniem przenośnych rejestratorów są hybrydowe systemy nadzoru i sterowania. Wyróżniają one część osobistą, odpowiedzialną za rejestrację sygnałów elektrodiagnostycznych, oraz część stacjonarną, nadzorującą pacjenta i identyfikującą potencjalne zagrożenia zdrowia i życia. W zakresie obrazowania medycznego zaprezentowano trzy obszary, dla których zaprojektowano algorytmy segmentacji: mięsień sercowy, implanty wewnątrznaczyniowe oraz tętnice szyjne. Metody te oparte są w głównej mierze na modelach deformowalnych: metodzie aktywnego konturu oraz zbiorów poziomicowych.
    This article deals with current issues in electrodiagnostics and image diagnostics of the heart and vessels. All research takes place in the Biocybernetics Laboratory of AGH University of Science and Technology. In the article, an idea of a portable ECG recorder, which auto adaptively changes ECG interpretation software, is being presented. This group of systems is extended by hybrid systems for supervision and control. They consist of personal and stationary parts, which are responsible respectively for signal acquisition and patient monitoring, as well as identification of potentially threatening conditions. In the field of medical imaging, three domains are presented, for which image segmentation algorithms are proposed: a myocardium, an intravascular implants and carotid arteries. These methods are mostly based on the deformable models: active contour and level-set methods.
    Źródło:
    Pomiary Automatyka Robotyka; 2011, 15, 12; 89-93
    1427-9126
    Pojawia się w:
    Pomiary Automatyka Robotyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Strategie rekonstrukcji obiektów trójwymiarowych na podstawie zbioru dwuwymiarowych obiektów
    Strategies of reconstruction of three-dimentional objects basing on sets of two-dimantional objects
    Autorzy:
    Stasiński, K.
    Jóźwiak, I. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/320964.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    obiekt trójwymiarowy
    figura geometryczna
    strategia rekonstrukcji
    three-dimensional object
    geometric figure
    reconstruction strategy
    Opis:
    W artykule omówiono strategie odzyskiwania trójwymiarowych obiektów, bazując na opisie danego obiektu za pomocą zbiorów figur geometrycznych. Figury te mogą przyjmować dowolne, nieregularne kształty oraz składać się z różnej liczby punktów. Strategie oparte są na algorytmach automatycznych i półautomatycznych. Zaproponowano nowe metody rekonstrukcji obiektów trójwymiarowych ze zbiorów figur.
    The paper describes the strategies of reconstruction of three-dimensional objects basing on sets of two-dimensional geometric figures. The figures can be described by any number of points and have irregular shapes. Described strategies involve automatic and semiautomatic algorithms. The article suggest the new methods of 3D object reconstruction.
    Źródło:
    Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2015, 86; 527-536
    1641-3466
    Pojawia się w:
    Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interpolation-based reconstruction methods for tomographic imaging in 3D positron emission tomography
    Autorzy:
    Li, Y.
    Kummert, A.
    Boschen, F.
    Herzog, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/908045.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    rekonstrukcja tomograficzna
    interpolacja dwuwymiarowa
    twierdzenie o przekroju Fouriera
    szereg rozdzielczy
    tomographic reconstruction
    three-dimensional positron emission tomography
    Fourier slice theorem
    frequency sample distribution
    two-dimensional interpolation
    inverse distance weighting
    gridding method
    Opis:
    Positron Emission Tomography (PET) is considered a key diagnostic tool in neuroscience, by means of which valuable insight into the metabolism function in vivo may be gained. Due to the underlying physical nature of PET, 3D imaging techniques in terms of a 3D measuring mode are intrinsically demanded to assure satisfying resolutions of the reconstructed images. However, incorporating additional cross-plane measurements, which are specific for the 3D measuring mode, usually imposes an excessive amount of projection data and significantly complicates the reconstruction procedure. For this reason, interpolation-based reconstruction methods deserve a thorough investigation, whose crucial parts are the interpolating processes in the 3D frequency domain. The benefit of such approaches is apparently short reconstruction duration, which can, however, only be achieved at the expense of accepting the inaccuracies associated with the interpolating process. In the present paper, two distinct approaches to the realization of the interpolating procedure are proposed and analyzed. The first one refers to a direct approach based on linear averaging (inverse distance weighting), and the second one refers to an indirect approach based on two-dimensional convolution (gridding method). In particular, attention is paid to two aspects of the gridding method. The first aspect is the choice of the two-dimensional convolution function applied, and the second one is the correct discretization of the underlying continuous convolution. In this respect, the geometrical structure named the Voronoi diagram and its computational construction are considered. At the end, results of performed simulation studies are presented and discussed.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2008, 18, 1; 63-73
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies