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    Wyświetlanie 1-4 z 4
    Tytuł:
    Sonification: Review of Auditory Display Solutions in Electronic Travel Aids for the Blind
    Autorzy:
    Bujacz, M.
    Strumiłło, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/177613.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sonification
    auditory display
    electronic travel aid
    visual impairment
    blindness
    assistive technologies
    Opis:
    Sonification is defined as presentation of information by means of non-speech audio. In assistive technologies for the blind, sonification is most often used in electronic travel aids (ETAs) – devices which aid in independent mobility through obstacle detection or help in orientation and navigation. The presented review contains an authored classification of various sonification schemes implemented in the most widely known ETAs. The review covers both those commercially available and those in various stages of research, according to the input used, level of signal processing algorithm used and sonification methods. Additionally, a sonification approach developed in the Naviton project is presented. The prototype utilizes stereovision scene reconstruction, obstacle and surface segmentation and spatial HRTF filtered audio with discrete musical sounds and was successfully tested in a pilot study with blind volunteers in a controlled environment, allowing to localize and navigate around obstacles.
    Źródło:
    Archives of Acoustics; 2016, 41, 3; 401-414
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of coupled neural oscillators for image texture segmentation and modeling of biological rhythms
    Autorzy:
    Strumiłło, P.
    Strzelecki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/908378.pdf
    Data publikacji:
    2006
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    rytm biologiczny
    oscylacja nieliniowa
    stymulator serca
    biological rhythms
    nonlinear oscillations
    networks of synchronised oscillators
    texture segmentation
    cardiac pacemakers
    Opis:
    The role of relaxation oscillator models in application fields such as modeling dynamic systems and image analysis is discussed. A short review of the Van der Pol,Wilson-Cowan and Terman-Wang relaxation oscillators is given. The key property of such nonlinear oscillators, i.e., the oscillator phase shift (called the Phase Response Curve) as a result of external pulse stimuli is indicated as a fundamental mechanism to achieve and sustain synchrony in networks of coupled oscillators. It is noted that networks of such oscillators resemble a variety of naturally occurring phenomena (e.g., in electrophysiology) and dynamics arising in engineering systems. Two types of oscillator networks exhibiting synchronous behaviors are discussed. The network of oscillators connected in series for modeling a cardiac conduction system is used to explain causes of important cardiac abnormal rhythms. Finally, it is shown that a 2D network of coupled oscillators is an effective tool for segmenting image textures in biomedical images.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2006, 16, 4; 513-523
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of stereovision, digital maps and inertial sensors for estimation of geographical location
    Autorzy:
    Barański, P.
    Polańczyk, M.
    Strumiłło, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/115429.pdf
    Data publikacji:
    2010
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    sensor fusion
    GPS navigation
    stereovision
    digital maps
    dead reckoning
    Opis:
    The paper presents an approach that integrates stereoscopic images, numerical maps of terrain and inertial sensors’ signals for estimation of geographical location of system user. The proposed solution improves on the GPS system in terms of accuracy and it can be used also inside buildings where GPS readouts are not available. The system was designed with a view of blind pedestrians. The prototype employs the particle fi ltering algorithm to fuse data from diff erent sources.
    Źródło:
    Challenges of Modern Technology; 2010, 1, 1; 65-68
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fusion of data from inertial sensors, raster maps and GPS for estimation of pedestrian geographic location in urban terrain
    Autorzy:
    Barański, P.
    Polańczyk, M.
    Strumiłło, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/221003.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pedestrian navigation
    data fusion
    GPS
    digital maps
    particle filtering
    electronic travel aids
    Opis:
    An electronic system and an algorithm for estimating pedestrian geographic location in urban terrain is reported in the paper. Different sources of kinematic and positioning data are acquired (i.e.: accelerometer, gyroscope, GPS receiver, raster maps of terrain) and jointly processed by a Monte-Carlo simulation algorithm based on the particle filtering scheme. These data are processed and fused to estimate the most probable geographical location of the user. A prototype system was designed, built and tested with a view to aiding blind pedestrians. It was shown in the conducted field trials that the method yields superior results to sole GPS readouts. Moreover, the estimated location of the user can be effectively sustained when GPS fixes are not available (e.g. tunnels).
    Źródło:
    Metrology and Measurement Systems; 2011, 18, 1; 145-157
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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