Optical Flow Estimation by Integrating Featore-Based with Flow-Based Schemes under Multiresolution

Despite great advances in the analysis of time-varying images, se~hing for correct and robust algorithm is still challenging and elusive. Two schemes, correspond-ing to small or large temporal intervals, are usually distinguished in measuring visual motion. One, called flow-based method, is based directly on the local intensity changes. The other one, called token-based meth ~ is based on identifiable features which are located and matched over time. This paper presents a new scheme that com-bines a token-based technique with a multigrid flow-based technique to achieve a reli-able estimation of optical flow field. Results with a sequence of real images are also provided