Recognition and velocity computation of large moving objects in images
Sabri A. Mahmoud, M. Afifi, R.J. Green · IEEE Transactions on Acoustics Speech and Signal Processing · 1988
Two one-dimensional time sequences are generated from the projections of the two-dimensional sequence on the x and y axes. Then the two-dimensional fast Fourier transform for the generated time sequences is computed. A peak in the spectrum for the selected spatial frequency is detected. The temporal frequency at which the peak is detected gives an estimate of the velocity of the moving object. Analytical formulations for large moving objects in a time sequence with zero background are presented. An algorithm is given for velocity formulation.>