Abstract: A camera-based surveillance system operates to detect presence of unauthorized individuals in digital images taken by a camera unit at a venue visited by individuals that are either authorized or unauthorized. A control unit in the surveillance system obtains, from a positioning system, a position parameter for each authorized individual located at the venue, processes each digital image for detection of one or more individuals, and detects presence of one or more unauthorized individuals in the digital image as a function of the individual(s) detected in the digital image and the position parameter(s) for the one or more authorized individuals. The positioning system may comprise a base station for receiving authorized data transmissions generated by wireless communication devices located at said venue, and a positioning module for determining the position parameter of the respective communication device with respect to the base station based on a respective authorized data transmission.

Abstract: A camera-based surveillance system operates to detect presence of unauthorized individuals in digital images taken by. a camera unit at a venue visited by individuals that are either authorized or unauthorized. A control unit in the surveillance system obtains, from a positioning system, a position parameter for each authorized individual located at the venue, processes each digital image for detection of one or more individuals, and detects presence of one or more unauthorized individuals in the digital image as a function of the individual(s) detected in the digital image and the position parameter(s) for the one or more authorized individuals. The positioning system may comprise a base station for receiving authorized data transmissions generated by wireless communication devices located at said venue, and a positioning module for determining the position parameter of the respective communication device with respect to the base station based on a respective authorized data transmission.