Patent ID: 7263472
Filing Date: 2007-08-28
Classification: G06K,G06T

Abstract:
1. A method for modeling a set of trajectories of a set of objects, there being one trajectory for each object, comprising: obtaining a sequence of positions of each object over a duration of time to define a trajectory of the object, in which the sequence of positions is defined by where T is the trajectory, p n is an n th position of the object, (x, y, t), are coordinates of the position, and N is the duration of the trajectory; and projecting each sequence of positions to a corresponding hidden Markov model to model the trajectory of each object, in which the model uses M mixtures of continuous Gaussian probability distributions, the model has K states, and in which the duration N is substantially larger than the number of mixtures M times the number of states K, such that N>>M×K.