Apparatus and method for distinguishing between camera movement and object movement and extracting object in a video surveillance system

Abstract

The invention relates to an apparatus and a method for distinguishing between camera movement and object movement, and for extracting an object in a video surveillance system for detecting an invader based upon object movement. The apparatus and method distinguish actual invader detection owing to object movement from erroneous invader detection owing to a camera's movement or shaking. In the case of actual invader detection owing to object movement, a corresponding object is extracted. In this way, optical flow is obtained from an input dynamic image, and is converted into angle values and classified. If an angle value exceeds a predetermined critical value, it is determined that object movement is detected. If the angle value does not exceed the predetermined critical value, it is determined that camera movement or shaking is detected. In the case of object movement, only an area of movement is extracted from an object via X-Y projection with respect to optical flow of an object, and then the object is divided. This is carried out in consecutive frames to track a passage of the moving object.

Dependencies are inferred from the claim text.