“…Thus, Liu and Shen (2008) From the physics-based Optical Flow equation, they developed a theorem that confirms a unique solution of the minimization problem, thus verifying that the minimization preserves discontinuities in a fluid velocity field (B. Wang et al, 2014). Other work includes the study of optical flow with regards to an optimal control problem, where divergence free criteria, for flow conservation, is applied that leads to a proof for the optimal conditions for the optical flow (Barbu et al, 2016).…”