Patent ID: 8422791

Claim:
A computer-implementable method for classifying a detected region of change of a video frame as one of an abandoned object event and an object removal event, wherein a plurality of boundary blocks define a boundary of the region of change, said method comprising the steps of: (a) for each boundary block of a set of the boundary blocks: (i) determining an observed edge characteristic of the boundary block, the observed edge characteristic including an observed edge orientation; (ii) determining a predicted edge characteristic for the boundary block based on a configuration of the boundary block and other boundary blocks adjacent to the boundary block, the predicted edge characteristic including a predicted edge orientation; and (iii) determining an individual block score for the boundary block, based at least upon a correspondence between the predicted edge orientation for the boundary block and the observed edge characteristic orientation for the boundary block; (b) determining a total score for the region of change, based on the individual block scores of the boundary blocks; and (c) classifying the region of change as the one of an abandoned object event and an object removal event based on the total score.