Phase-Based Motion Processing

A family of computer vision techniques that decompose video frames into complex steerable pyramids and analyse changes in the temporal phase of each scale and orientation to recover motion, including sub-pixel movements invisible to the naked eye. Because it operates in the frequency domain and is sensitive to very small displacements, phase-based processing is well-suited to extracting subtle motion signals for downstream uses such as motion magnification, material property estimation, and video-to-haptics generation, where it can provide a fine-grained dynamic feature to drive a vibrotactile actuator.