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    Wyświetlanie 1-5 z 5
    Tytuł:
    Comparison of Effective Coverage Calculation Methods for Image Quality Assessment Databases
    Autorzy:
    Buczkowski, M.
    Stasiński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/225967.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Image Quality Assessment
    IQA database analysis
    effective coverage
    Opis:
    This article provides a comparison of a three methods that can be used for calculating effective coverage of image quality assessment database. The aim of this metric is to show how well the database is filled with variety of images. For each image in the database the Spatial Information (SI) and Colorfulness (CF) metric is calculated. The area of convex hull containing all the points on SI x CF plane is indication of total coverage of the database, but it does not show how efficiently this area is utilized. For this purpose an effective coverage was introduced. An analysis is performed for 16 databases - 13 publicaly available and 3 artificial created for the purpose of showing advantages of the effective coverage.
    Źródło:
    International Journal of Electronics and Telecommunications; 2018, 64, 3; 307-313
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Entropy Coder for Audio Signals
    Autorzy:
    Ulacha, G.
    Stasinski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/226974.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lossless audio coding
    entropy coding
    OLS
    Opis:
    In the paper an effective entropy coder designed for coding of prediction errors of audio signals is presented. The coder is implemented inside a greater structure, which signal modeling part is a lossless coding backward adaptation algorithm consisting of cascaded Ordinary Least Squares (OLS), three Normalized Least Mean Square (NLMS), and prediction error bias correction sections. The technique performance is compared to that of four other lossless codecs, including MPEG-4 Audio Lossless (ALS) one, and it is shown that indeed, on the average the new method is the best. The entropy coder is an advanced context adaptive Golomb one followed by two context adaptive arithmetic coders.
    Źródło:
    International Journal of Electronics and Telecommunications; 2015, 61, 2; 219-224
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Novel Ideas for Lossless Audio Coding
    Autorzy:
    Ulacha, G.
    Stasiński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/227339.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Lossless Audio Coding
    context coding
    LS predictors
    MMSE
    MMAE
    zero-order entropy
    Opis:
    Novel ideas for lossless audio coding analyzed in the paper are linked with forward predictor adaptation, and concern optimization of predictors on the basis of zero-order entropy and MMAE criterions, and context sound coding. Direct use of the former criterion is linked with exponential growth of optimization procedure, hence, a suboptimal algorithm having polynomial complexity is proposed. It is shown that on average the new types of predictors are better than those obtained by MMSE technique, while two- and three context systems are on average better than a single predictor one. It also appears that 7-bit PARCOR coefficients in the MPEG-4 ALS standard have insufficient precision for some predictor length, and that for very long frames coding results improve with the predictor rank practically in unlimited way.
    Źródło:
    International Journal of Electronics and Telecommunications; 2013, 59, 1; 17-23
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-invasive measurement of chemical compounds levels in human body
    Autorzy:
    Kossowski, T.
    Kossowska, K.
    Stasiński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/114236.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    glucose level measurement
    NIR spectroscopy
    non-invasive diagnosis
    ethanol level measurement
    Opis:
    The paper presents a system for measuring substances in human body by a combined technique: using visible light and near infrared spectroscopy. The approach is non-invasive, attenuation of radiation by tissues is evaluated. Measurement of two chemical compounds levels is described: that of glucose and of ethylic alcohol (ethanol). The presented measuring system is self-calibrating. Due to this, it is possible to measure changes of compound concentrations in different parts of body, e.g. wrist, arms or legs. The main measurement is done in infrared light (up to 1000 nm), auxiliary ones are performed in visible light (narrow band between 600-680 nm and wide spectrum from around 420 nm to 780 nm - white light). This allows for measurement not only a compound level, but also characteristic properties of tissues in place where measurement is done. Results of measurements are provided and advantages of multi-wavelength measurements discussed.
    Źródło:
    Measurement Automation Monitoring; 2017, 63, 6; 200-202
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-invasive blood glucose measurement
    Autorzy:
    Kossowski, T.
    Kossowska, K.
    Stasiński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/114602.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    glucose level measurement
    IR spectroscopy
    non-invasive diagnosis
    Opis:
    The paper presents a system for measuring blood glucose level based on spectroscopy in the near infrared range. Specific features of this system are limited spectral range of measurements, and the use of visible light detector to identify the density of irradiated tissue and to correct measurement results in the infrared range. Presented are principles of measuring system construction, including measures undertaken to increase its precision and results of tests carried out using the constructed measurement system. The results are close to those obtained from a traditional meter.
    Źródło:
    Measurement Automation Monitoring; 2016, 62, 5; 175-177
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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