MATLAB: Velocity of moving object at x and y axis

Question

I want to calculate the velocity and acceleration of a moving object. I have the centroid value and i am calculating the distance covered by using euclidean distance formula on current and previous centroid. I am confused on how do we calculate velocity and acceleration of a moving object at x and y-axis. Do we simply divide the euclidean distance formula into x(centroid x) and y(centroid y) parts?

Answer 1

You can get the velocities in X and Y direction independently.

Vx = gradient(X, TimeStep);
Vy = gradient(Y, TimeStep);

Or:

S = blobCentroid - PrevCent;
V = gradient(S, TimeStep);

Now V contains teh X and Y component.