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Rigid body motion trajectories can provide sufficient clues in understanding motion behaviors of objects of interest. An invariant descriptor for a motion trajectory can offer substantial advantages over raw data. This paper firstly proposes a Dual Square-Root Function (DSRF) descriptor by only calculating gradient-based shape features of normalized rigid body motion trajectories, while high-order...
Motion trajectories have been widely used for gesture recognition. An effective representation of 3D motion trajectory is important for capturing and recognizing complex motion patterns. In this paper, we propose a view invariant hierarchical parsing method for free form 3D motion trajectory representation. The raw motion trajectory is first parsed into four types of trajectory primitives based on...
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