| 摘要 |
A surveillance camera system includes a mask image setting unit which sets a mask image at a predetermined location on an image displayed on a monitor, a mask coordinate storing unit which stores data of a coordinate of the set mask image on a mask plane coordinate plot of the set mask image, an inverted mask coordinate storing unit which calculates and stores data of a coordinate of the mask image inverted by an inversion pan range of ±180 degrees relative to the coordinate on the mask plane coordinate plot and data of a coordinate of the mask image inverted by an inversion tilt range of ±180 degrees relative to the coordinate on the mask plane coordinate plot, a determining unit which determines whether the mask image or the inverted mask image is present within the view angle of the surveillance camera, based on detected pan and tilt ranges and a detected zoom factor, and an image display control unit which controls the surveillance camera so that the mask image or inverted mask image is superposed on the pickup image to be displayed when the mask image or the inverted mask image is present within the view angle of the surveillance camera, based on determination by the determining unit.
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