Moving visual representations of video objects for content-based search and browsing

This paper proposes object-based moving visual representations for quick browsing of video content. These representations are hierarchical, such that at the coarse level a sequence of alpha planes provides a moving representation of object shape and motion information for object contours. Alternatively, a 2D mesh representation provides a complete visual representation of object motion and shape. The finest level visual representation can be obtained by texture mapping onto the moving meshes. The paper also discusses trade-offs between each representation in terms of the amount of indexing information that needs to be stored, the robustness of the representation, and the accuracy of the representation.