Patent ID: 8675064

Claim:
A display system comprising: a camera device that takes an image of an area illuminated by a lighting device, to produce a motion video image as an output; an image capture unit configured to: during an effective-image-area determination process, capture a single still image from the motion video image in response to an output signal generated by the lighting device when the lighting device is on, and during a monitoring routine, sequentially capture a series of still images forming the motion video image; an effective-image-area determination unit that performs the following during the effective-image-area determination process: receives the captured single still image, determines an effective image area of the captured single still image, calculates coordinate data indicative of the determined effective image area, and stores the calculated coordinate data; a storage unit into which said effective-image-area determination unit stores the calculated coordinate data indicative of the effective image area during the effective-image-area determination process; and an image control processor that performs the following during the monitoring routine: accesses the storage unit in order to extract therefrom the stored coordinate data calculated by said effective-image-area determination unit during the effective-image-area determination process, scales up or down the effective image area of each of the sequentially captured series of still images, according to the extracted stored coordinate data and a display area of a display monitor device.