Semi-Automatic Relative Calibration Method for Master Slave Camera Control

A security system comprising:

• a first camera recording a first field of view;
• a second camera including a panning function, a tilting function, and a magnification function recording a second field of view;
• the first camera recording a target in the first field of view, and outputting a control signal to a computing device indicative of a location parameter of the target in the fixed field of view;
• the computing device receiving the control signal and converting the control signal to a second signal;
• the second camera receiving the second signal and engaging in at least one function including the panning function, the tilting function, and the zooming function to record the target in the second field of view in response to the second signal;
• the second camera being calibrated to the first camera by a model that includes at least one of (a) an optical center for the second field of view, (b) a magnification ratio between the target located in the first field of view relative to the second field of view and (c) a pan and tilt model that provides a relationship between a first camera coordinates and pan and tilt values to position the second camera at the optical center. 24