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English Description：
background subtraction is verycritical task for detecting foreground and it is the first step of object tracking before going for implementation...Backgroundsubtraction is a common first step in the field of video processing and it isused to reduce the effective image size in subsequent processing steps bysegmenting the mostly static background from the moving or changing foreground. Backgroundsubtraction is one of the key techniques for automatic video analysis,especially in the domain of video surveillance. Different methods have been proposed to detect object motion by usingdifferent background subtraction techniques over recent years. Each techniquehas its own benefits and limitations such as some techniques can only appliedfor static bac