Microsoft Corporation
Detecting motion in video using motion vectors

Abstract:

Technology is disclosed herein for detecting motion in video using motion vectors. In an implementation, a frame of video is divided into regions and a vector score is identified for each of the regions. A selection is then made of a subset of the regions based on the identified vector scores, i.e. at least some of the regions may be excluded from further analysis based on their score. The selected subset is divided into or grouped in clusters. Motion may then be identified in response to at least one of the clusters appearing in at least one other frame of the video.