Learning to Estimate and Refine Fluid Motion with Physical Dynamics

Understand

Extracting information on fluid motion directly from images is challenging.

• Fluid flow represents a complex dynamic system governed by the Navier-Stokes equations.
• General optical flow methods are typically designed for rigid body motion, and thus struggle if applied to fluid motion estimation directly.
• Further, optical flow methods only focus on two consecutive frames without utilising historical temporal information, while the fluid motion (velocity field) can be considered a continuous trajectory constrained by time-dependent partial differential equations (PDEs).