Multilayer Codebook-based monitoring region invasion method

The invention discloses a multilayer Codebook-based monitoring region invasion method. The method comprises the steps of taking a video image used for background modeling as a temporary background model; when training time meets a given value Tm, searching for eight domains of background pixels in the temporary background model and forming a connected domain; when the area of the connected domain meets an area threshold Sm and an access frequency Fm, adding all pixels in the connected domain to a permanent background model, and deleting the pixels from the temporary background model; and searching for corresponding pixel in the permanent background model according to each pixel in a to-be-detected image, and if the corresponding pixel does not exist, determining the to-be-detected image as a foreground. According to the method, isolated noises can be effectively prevented from being added to the permanent background model; and false alarm due to light sudden change caused by lightning and train light is effec