Estimating motion with principal component regression strategies
This work addresses motion estimation in video processing, but it appears incremental as it builds on existing pel-recursive and regularized least squares approaches with minor modifications.
The paper tackles the problem of estimating optical flow between video frames by introducing two simple principal component regression methods that operate in a pel-recursive manner, resulting in robust motion vector estimates without requiring knowledge of noise distribution.
In this paper, two simple principal component regression methods for estimating the optical flow between frames of video sequences according to a pel-recursive manner are introduced. These are easy alternatives to dealing with mixtures of motion vectors in addition to the lack of prior information on spatial-temporal statistics (although they are supposed to be normal in a local sense). The 2D motion vector estimation approaches take into consideration simple image properties and are used to harmonize regularized least square estimates. Their main advantage is that no knowledge of the noise distribution is necessary, although there is an underlying assumption of localized smoothness. Preliminary experiments indicate that this approach provides robust estimates of the optical flow.