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    Wyświetlanie 1-3 z 3
    Tytuł:
    Depth extraction in computational integral imaging based on bilinear interpolation
    Autorzy:
    Huang, Huihua
    Ge, Peng
    Powiązania:
    https://bibliotekanauki.pl/articles/1835812.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    computational integral imaging
    depth extraction
    bilinear interpolation algorithm
    Opis:
    We proposed a method using a merit function to determine the depth of objects in computational integral imaging by analyzing the existing methods for depth extraction of target objects. To improve the resolution of reconstructed slice images, we use a digital camera moving in horizontal and vertical direction with the set interval to get elemental images with high resolution and bilinear interpolation algorithm to increase the number of pixels in slice image which improves the resolution obviously. To show the feasibility of the proposed method, we carried out our experiment and presented the results. We also compared it with other merit functions. The results show that merit function SMD2 to determine the depth of objects is more accurate and suitable for real-time application.
    Źródło:
    Optica Applicata; 2020, 50, 4; 497-509
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison analysis of the theoretical and forecasted values of mining terrain curvatures with reference to their values caused by multi-deposit exploitation conducted at the great depth
    Autorzy:
    Orwat, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/104178.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
    Tematy:
    multi-seams extraction
    exploitation at large depth
    observed
    theoretical and forecasted curvatures of mining terrain
    J. Białek’s formulas
    Opis:
    In this article were presented the results of comparison analysis of mining terrain curvatures values, which were caused by a multiple exploitation of hard coal in several coal beds numbered 338/2, 341 and 358/1. The curvatures values (observed on the measuring line) were compared with their theoretical values calculated on the base of subsidence forecasted by the use of the Białek’s formula (with the values of its parameters determined from the survey results) and with the curvatures values modeled with this formula directly. On the base of this comparison, there was made an evaluation of effectiveness of made forecasts and conducted theoretical calculations. Taking into account the values of correlation coefficients and standard deviations between the ‘measured’ and theoretical, and forecasted graphs of curvatures, it was defined which graphs fit better to the real results of geodesic measurements. It should be marked that an exploitation of three coal beds was conducted by the longwall system with the roof rocks falling into the post-exploitation emptiness, at a great depth amounts from 600 m (the 338/2 coal bed) to 1,000 m (the 358/1 coal bed). The influences coming from the exploitation of these coal beds were observed within 10 years on 53 points of measuring line, which was located above the middle of the B – 2 longwall in the 338/2 coal bed and parallel to the runs of excavations in this coal bed. The surveys of the points heights and distances between the measuring points were done in the three- and four-monthly cycles. Based on these measurements, the values of mining terrain curvatures were designated.
    Źródło:
    Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2018, 65, 3; 73-82
    2300-5130
    2300-8903
    Pojawia się w:
    Czasopismo Inżynierii Lądowej, Środowiska i Architektury
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    3D objects modelling and description from a traffic flow
    Autorzy:
    Bojmir, M.
    Hudec, R.
    Kamencay, P.
    Pirnik, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/393627.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Stowarzyszenie Telematyki Transportu
    Tematy:
    vehicle detection
    vehicle extraction
    depth map
    3D modelling polygonal mesh
    detekcja pojazdów
    ekstrakcja pojazdów
    mapa głębi
    modelowanie 3D
    Opis:
    Contemporary research activities in the area of transportation systems usually utilize computer vision techniques. These activities are mostly oriented to the analysis of traffic flow. Key parts of the analysis consist of detection, extraction, modelling and recognition of objects in the traffic flow. Additional information can be obtained by the object tracking, too. The main aim of this contribution is to propose a new method for modelling 3D objects that are moving in the traffic flow. At the beginning of this paper, basic methods of object detection and extraction are shortly described. Moreover, the modified algorithm based on the object extraction and 3D models creation by mesh is also proposed. That mesh model is generated from a depth map. Finally, the results of proposed method are presented in the last part of this paper.
    Źródło:
    Archives of Transport System Telematics; 2013, 6, 3; 4-9
    1899-8208
    Pojawia się w:
    Archives of Transport System Telematics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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