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    Estimated Motion Comparison - Correlations vs Optic Flow - Cylinder Wake

    Pierre Dérian

    par Pierre Dérian

    357 vues
    This video compares two fluid motion estimations obtained for the same image sequence with different approaches:
    - correlations (up), with 32x32 pixel windows and 50% overlay;
    - wavelet-based optic flow (bottom), at full resolution.
    The input sequence consists in 3072 experimental PIV images of 1024x1024 pixel representing the classical case of cylinder wake at Reynolds=3900.
    Displayed area corresponds to the the near-wake.
    Optic flow (bottom) enables here a much finer estimation of apparent motion.
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