Surveillance camera system

摘要

A surveillance camera system includes a first camera 5 having an angle of view θ1, a second camera 6 which is a combination of two camera modules 6a, 6b each having an angle of view θ2, a third camera 7 which is a combination of three camera modules 7a, 7b, 7c each having an angle of view θ3, and a local camera 8 having an angle of view θs. The first to third cameras 5 to 7 act as area surveillance cameras to which the optimum shooting distance is set, respectively. The local camera 8 takes a shot of a local area, which is set in a shooting area of the third camera 7, at the narrowest angle of view θs. The respective cameras take a shot individually under automatic exposure control.

主权项

1. A surveillance camera system comprising:
an area surveillance camera focused for a first shooting distance, the area surveillance camera configured to shoot a predetermined shooting area that is determined based on an angle of view; and a local camera focused for the first shooting distance, the local camera configured to shoot a local area, which is a part of the predetermined shooting area, at an angle of view narrower than that of the area surveillance camera and at a magnification ratio substantially equal to that of the area surveillance camera, wherein:
the area surveillance camera and the local camera take a shot under individual automatic exposure control, respectively, andthe area surveillance camera comprises a plurality of camera modules that individually shoot partitioned areas obtained by partitioning the predetermined shooting area into substantially identical areas, andthe local camera has the angle of view narrower than those of the camera modules, and the local camera shoots the local area which comprises a target of surveillance, the local area being a part of any one of the partitioned areas being shot with any one of the camera modules, at a magnification ratio substantially equal to those of the camera modules, andwherein the area surveillance camera and the local camera execute the automatic exposure control so that the target of surveillance is not extremely overexposed or extremely underexposed.