Three-dimensional space area video blind area identification method

The invention discloses a three-dimensional space region video blind area identification method, and the method comprises the steps: carrying out the modeling of a three-dimensional space region, and obtaining a three-dimensional space region model; acquiring information of a plurality of cameras in the three-dimensional space region model; according to the information of each camera, calculating an area which can be covered by the visual field of a single camera, namely a visual field; calculating to obtain a visible range overlapping region of all the cameras; the visual field overlapping area is subtracted from the three-dimensional space area to obtain the video blind area which is not covered by the cameras in the three-dimensional space area, the visual area of each camera is calculated and drawn through the three-dimensional space modeling method, the visual areas of all the cameras are subtracted from the three-dimensional space area, the visual field blind area which is not covered by the cameras is