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    Wyświetlanie 1-6 z 6
    Tytuł:
    High Resolution Noise Radar without Fast ADC
    Autorzy:
    Lukin, K. A.
    Vyplavin, P. L.
    Zemlyaniy, O. V.
    Palamarchuk, V. P.
    Lukin, S. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/227347.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    noise waveform
    stepped frequency
    stepped delay
    Opis:
    Conventional digital signal processing scheme in noise radars has certain limitations related to combination of high resolution and high dynamic range. The bandwidth of radar signal defines range resolution of any radar: the wider the spectrum the better the resolution. In noise radar with conventional processing the sounding and reference signals are to be digitized at intermediate frequency band and to be processed digitally. The power spectrum bandwidth of noise signal which can be digitized with ADC depends on its sampling rate. In currently available ADCs the faster is sampling rate the smaller is its depth (number of bits). Depth of the ADC determines relation between the smallest and highest observable signals and thus limits its dynamic range. Actually this is the main bottleneck of high resolution Noise Radars: conventional processing does not enable getting high range resolution and high dynamic range at the same time. In the paper we discuss ways to go around this drawback by changing signal processing ideology in noise radar. We present results of our consideration and design of two types of high resolution Noise Radar which uses slow ADCs: noise radar with digital generation of sounding signal and analog evaluation of cross-correlation and stepped frequency noise radar. We describe main ideas of these radar schemes and results of experimental tests of the approaches.
    Źródło:
    International Journal of Electronics and Telecommunications; 2012, 58, 2; 135-140
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of High-Resolution 3D Scanning in Medical Volumetry
    Autorzy:
    Chromy, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/226316.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    medical volumetry
    medical 3D scanning
    3D scanning
    medical imaging
    soft tissues
    Opis:
    This paper deals with application of 3D scanning technology in medicine. Important properties of 3D scanners are discussed with emphasize on medical applications. Construction of medical 3D scanner according to these specifications is described and practical application of its use in medical volumetry is presented. Besides volumetry, such 3D scanner is usable for many other purposes, like monitoring of recovery process, ergonomic splint manufacturing or inflammation detection. 3D scanning introduces novel volumetric method, which is compared with standard methods. The new method is more accurate compared to present ones. Principles of this method are discussed in paper and its accuracy is evaluated and experimentally verified.
    Źródło:
    International Journal of Electronics and Telecommunications; 2016, 62, 1; 23-31
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recognition of Sign Language from High Resolution Images Using Adaptive Feature Extraction and Classification
    Autorzy:
    Csóka, Filip
    Polec, Jaroslav
    Csóka, Tibor
    Kačur, Juraj
    Powiązania:
    https://bibliotekanauki.pl/articles/226004.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sign language
    gesture
    sign
    recognition
    CNN
    LoG
    real-time
    pattern recognition
    machine learning
    Opis:
    A variety of algorithms allows gesture recognition in video sequences. Alleviating the need for interpreters is of interest to hearing impaired people, since it allows a great degree of self-sufficiency in communicating their intent to the non-sign language speakers without the need for interpreters. State-of-the-art in currently used algorithms in this domain is capable of either real-time recognition of sign language in low resolution videos or non-real-time recognition in high-resolution videos. This paper proposes a novel approach to real-time recognition of fingerspelling alphabet letters of American Sign Language (ASL) in ultra-high-resolution (UHD) video sequences. The proposed approach is based on adaptive Laplacian of Gaussian (LoG) filtering with local extrema detection using Features from Accelerated Segment Test (FAST) algorithm classified by a Convolutional Neural Network (CNN). The recognition rate of our algorithm was verified on real-life data.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 2; 303-308
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Implementation and Results of New High Resolution SAR Modes for an Airborne Maritime Patrol Radar
    Autorzy:
    Gromek, D.
    Jarzębska, A.
    Samczyński, P.
    Misiurewicz, J.
    Malanowski, M.
    Kulpa, K.
    Gromek, A.
    Gadoś, A.
    Smolarczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/227113.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high resolution SAR
    real-time SAR imaging
    ISAR
    surveillance radar
    Opis:
    The paper presents new high resolution SAR results of real-life measurements using an updated ARS-400/ARS-800 SAR sensor installed on the maritime patrol aircraft M-28. The main role for such radars is surveying the sea surface, and the imaging of selected targets (e.g. ships, roads, vehicles, buildings, etc.) to help the operator in classifying them. In the present day increasing computing power, improved algorithms and general technological progress has allowed the obtaining of better results in SAR imagery.
    Źródło:
    International Journal of Electronics and Telecommunications; 2013, 59, 3; 213-218
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Results of High-Resolution ISAR Imaging of Ground-Moving Vehicles with a Stationary FMCW Radar
    Autorzy:
    Kulpa, J. S.
    Malanowski, M.
    Gromek, D.
    Samczyński, P.
    Kulpa, K.
    Gromek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/226701.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    SAR
    ISAR
    FMCW
    radar imaging
    Opis:
    In the paper experimental results of ISAR (Inverse Synthetic Aperture Radar) processing obtained with highresolution radar are presented. Targets under observation were ground moving vehicles, such as cars, trucks and tractors. The experiments were performed with a FMCW (FrequencyModulated Continuous-Wave) radar operating at 94 GHz with almost 1 GHz of bandwidth. Due to the measurement scenario more typical for SAR (Synthetic Aperture Radar), than ISAR, i.e. targets moving along straight line crossing the antenna beam, algorithms usually applied for SAR processing have been used.
    Źródło:
    International Journal of Electronics and Telecommunications; 2013, 59, 3; 293-299
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    SETHI: The Flying Lab
    Autorzy:
    Bruyant, J. P.
    Dreuillet, P.
    Du Plessis, O. R.
    Oriot, H.
    Dubois-Fernandez, P.
    Cantalloube, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/226573.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    SETHI
    flying lab
    SAR
    very high resolution
    PolInSAR
    bistatic images
    radar-optronics complementarity
    change detection
    biomass
    climate change
    environment
    security applications
    Opis:
    This paper presents the new-generation test bench SETHI, developed by ONERA, the French Aerospace Lab. SETHI is a medium range platform dedicated to environmental, scientific and security applications. The first part of this paper describes the system architecture, the development state and the future capabilities. A set of recent significant results are presented: these results cover various applications, such as high spatial resolution imaging, change detection between two acquisitions, biomass measurement in the rain forest, bistatic imaging and innovative measurements, such as air-to-air imaging or circular imaging.
    Źródło:
    International Journal of Electronics and Telecommunications; 2011, 57, 1; 29-35
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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