minimal example and validation of 3D flow result

[black0017]

hello @erikgaas ! thanks for providing this repo :)

can you make an example of how the functions you provide work for 3D optical flow estimation?

I see that using the img_derivatives() function you get 4 different flows (x,y,z and I guess time also)

but then what does def opt_flow(dimg, r=2) do ?

A final question I have in my mind is that if you validated your approach...

All the best ,

N.A.