Patent ID: 8754945

Claim:
A motion tracking method using an image capturing device, the image capturing device installed on a track system, the method comprising: capturing images of a monitored area using a lens of the image capturing device in real-time; analyzing the captured images to check for motion in the monitored area; determining a movement direction of the motion when the motion is detected in the monitored area; controlling the image capturing device to move along the track system to track the motion using a driving device according to the movement direction; extracting a smallest rectangle enclosing the motion from a current image of the monitored area; determining whether a ratio of the smallest rectangle within the current image is less than a preset value; controlling the image capturing device to pan and/or tilt the lens until a center of the smallest rectangle is coincident with a center of the current image of the monitored area if the ratio of the smallest rectangle within the current image is less than the preset value; and controlling the image capturing device to zoom in the lens to obtain a zoomed image of the motion until the ratio of the smallest rectangle within the current image is equal to or greater than the preset value.