Hi, I'm using PIVlab for my thesis in order to calculate the velocity and other parameters (strain rate, vorticity, etc.) of particles that move inside a microchannel. I'd like to extract the effective particles displacement used for the computation of the velocity during the image evaluation using a multi-pass DFT approach, but the two matrices xtable and ytable are composed by 20 columns containing a constant value for each column, because they are computed using:
so it's normal that they are constant value. What can I do for taking the right value of the displacements used for the computation of the two velocity along x axis and y axis?
Thank you very much!