This document discusses 4D motion capture using optical flow assumptions. It involves using passive stereophotogrammetry to recover a sequence of 3D models and then using optical flow tracking information to automatically locate the same landmark points across stereoscopic image pairs and project them onto subsequent 3D models in the sequence. This allows capturing the 4D motion of landmarks on an object's surface over time.

1. MohammedAlmuzian
4D Motion
Optical FlowAssumptions
Brightness Constancy

2. MohammedAlmuzian
4D Motion capture
• a combinationof passive stereophotogrammetrytorecoverasequence of 3D
models.
• a landmarkto be placedon the surface of the first3D model inthe sequence,then
projectedtoan image locationinthe firststereopairof images.The optical flow
trackinginformationwasthenusedtolocate automaticallythe same pointinthe
secondstereopairof images,whichwasthenprojectedontothe surface of the
second3D model,andsoon forsubsequentframes.