Object tracking

摘要

Methods, devices, and systems for object tracking are described herein. One or more method embodiments include receiving an initial set of track points associated with a trajectory of an object, compressing the initial set of track points into a plurality of track segments, each track segment having a start track point and an end track point, and storing the plurality of track segments to represent the trajectory of the object.

主权项

1. A computer implemented method for tracking an object, comprising:
compressing a plurality of initial data points associated with a trajectory of an object into a plurality of track segments, each track segment being a straight line having a start track point and an end track point, wherein compressing the plurality of initial data points into the plurality of track segments includes:
determining a covariance matrix from a number of available track point spatial positions;determining eigen values for the covariance matrix;using a least one of the eigen values as a measure to determine a variation from a straight line trajectory; andcomparing the least one of the eigen values with a spatial variation threshold to determine whether to stop or continue the compression; determining an angle of each track segment contained in the plurality of track segments with respect to a horizontal axis; storing the plurality of track segments and the angle of each track segment in a database; and determining whether an event detection rule has been satisfied by at least a portion of the plurality of track segments associated with the object.