Method for Calculating View-Invariant 3D Optical Strain
Matthew Shreve, Sergiy Fefilatyev, Nestor Bonilla, Gerardo Ayala Hernández, Dmitry B. Goldgof, Sudeep Sarkar · 2012
Optical strain maps calculated during a facial expression describe a bio-mechanical property of facial skin tissue, and are derived from the non-rigid motion incurred during facial expressions. In this paper, we propose a method for accurately estimating and modeling the three-dimensional strain impacted onto the face using standard optical flow techniques and a dynamic depth map. We demonstrate the robustness of this approach at different depth resolutions and views. Experimental results are given for a publically available dataset that contains high depth resolutions of facial expressions, as well as a new dataset collected using the Microsoft Kinect synchronized with two HD webcams.