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    Wyświetlanie 1-4 z 4
    Tytuł:
    Change Detection for SAR Imagery Using Connected Components Analysis
    Autorzy:
    Gromek, A.
    Jenerowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/227323.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    change detection
    TSX
    SAR image analysis
    remote sensing
    Opis:
    Objective of the described analysis is to provide consistent change detection method based on image processing techniques applied to the Synthetic Aperture Radar (SAR) images acquired over the same geographical area, but at two different time instances. The approach adopted in our work requires incorporation of results with the additional information derived from analysis based on mathematical morphology (MM) techniques and visual interpretation of multitemporal VHR optical satellite images.
    Źródło:
    International Journal of Electronics and Telecommunications; 2012, 58, 2; 111-116
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance of Unsupervised Change Detection Method Based on PSO and K-means Clustering for SAR Images
    Autorzy:
    Shehab, Jinan N.
    Abdulkadhim, Hussein A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1844494.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    change detection
    k-means clustering
    multitemporal satellite image
    PSO
    Gabor wavelet filter
    remote sensing
    Opis:
    This paper presents unsupervised change detection method to produce more accurate change map from imbalanced SAR images for the same land cover. This method is based on PSO algorithm for image segmentation to layers which classify by Gabor Wavelet filter and then K-means clustering to generate new change map. Tests are confirming the effectiveness and efficiency by comparison obtained results with the results of the other methods. Integration of PSO with Gabor filter and k-means will providing more and more accuracy to detect a least changing in objects and terrain of SAR image, as well as reduce the processing time.
    Źródło:
    International Journal of Electronics and Telecommunications; 2021, 67, 3; 403-408
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Change Point Determination in Audio Data Using Auditory Features
    Autorzy:
    Maka, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/226762.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    audio change point detection
    auditory features
    gammatone filter bank
    Opis:
    The study is aimed to investigate the properties of auditory-based features for audio change point detection process. In the performed analysis, two popular techniques have been used: a metric-based approach and the ∆BIC scheme. The efficiency of the change point detection process depends on the type and size of the feature space. Therefore, we have compared two auditory-based feature sets (MFCC and GTEAD) in both change point detection schemes. We have proposed a new technique based on multiscale analysis to determine the content change in the audio data. The comparison of the two typical change point detection techniques with two different feature spaces has been performed on the set of acoustical scenes with single change point. As the results show, the accuracy of the detected positions depends on the feature type, feature space dimensionality, detection technique and the type of audio data. In case of the ∆BIC approach, the better accuracy has been obtained for MFCC feature space in the most cases. However, the change point detection with this feature results in a lower detection ratio in comparison to the GTEAD feature. Using the same criteria as for ∆BIC, the proposed multiscale metric-based technique has been executed. In such case, the use of the GTEAD feature space has led to better accuracy. We have shown that the proposed multiscale change point detection scheme is competitive to the ∆BIC scheme with the MFCC feature space.
    Źródło:
    International Journal of Electronics and Telecommunications; 2015, 61, 2; 185-190
    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 1-4 z 4

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