Differential Tracking based on Spatial-Appearance Model (SAM)

A fundamental issue in differential motion analysis is the compromise between the flexibility of the matching criterion for image regions and the ability of recovering the motion. Localized matching criteria, e.g., pixel-based SSD, may enable the recovery of all motion parameters, but it does not tolerate much appearance changes. On the other hand, global criteria, e.g., matching histograms, can accommodate dramatic appearance changes, but may be blind to some motion parameters, e.g., scaling and rotation. This paper presents a novel differential approach that integrates the advantages of both in a principled way based on a spatial-appearance model (SAM) that combines local appearances variations and global spatial structures. This model can capture a large variety of appearance variations that are attributed to the local non-rigidity. At the same time, this model enables efficient recovery of all motion parameters. A maximum likelihood matching criterion is defined and rigorous analy...

• Type: Conference
• Year: 2006
• Where: CVPR
• Authors: Ting Yu, Ying Wu
• Keywords: Computer Vision, CVPR 2006, Dramatic Appearance Changes, Dramatic Appearance Deformations, Likelihood Matching Criterion, Motion Parameters, Motion Tracking