Optic flow Lukas and Kanade's Optical flow

This is not my work, I simply translated the code into Python.

It takes two frame and calculates the velocity vector in x and y direction.

Applies Gaussian derivative mask in x axis and y axis to the frame 1 and 2. This attains I_x and I_y.

For I_t you just apply a normal Gaussian kernel and subtract the two frames.

I_x(q_i) = I_x

so on and so on

Then use this equation to calculate V_x and V_y:

And here is the Image: