Abstract: A repeater for relaying data signals between two nodes is provided. The repeater includes a first signal processor that amplifies the received data signals, a path controller that transmits initial information of the received data signal through a first path to determine if the received data signal is from a specific local area and transmits data signals following the initial information through a second path to amplify the data signals following the initial information, a second signal processor that amplifies and transmits the data signal, and a data selection processor that allows the data signals following the initial information to be transmitted through the second path when it is determined using the initial information received that the received data signal is from the specific local area.

Abstract: An image quality control system and method is disclosed. At least one infrared camera takes a screen image of a room. When there are a plurality of cameras, images of the cameras are synchronized with respect to time, and a specific object of the image is tracked to estimate image quality of the object. When there are a plurality of cameras, a 3D screen model is reconfigured, and positions of the cameras and the infrared lighting tools are controlled. Infrared lighting and the cameras are controlled, and particularly, optical axis direction, optical magnification, exposure time, and the iris of the camera can be amended. Next, a high-quality object image list can be generated so as to process the images.

Abstract: Disclosed is a method of intruder's detection, comprising of using of more than 1 sensor, represented, for example, by video cameras that are arranged with fixed spatial orientation for stereo detector formation at that 2D distributions of light intensity that form stereo images registered by stereo detector are transmitting to blocks of processing, for example, blocks of digital processing at that mentioned blocks of digital processing perform processing of sequence of stereo images with different frequencies (high and low), to determine the presence of intruder, it's position and speed of transference.

Abstract: Disclosed is a method of intruder's detection, comprising of using of more than 1 sensor, represented, for example, by video cameras that are arranged with fixed spatial orientation for stereo detector formation at that 2D distributions of light intensity that form stereo images registered by stereo detector are transmitting to blocks of processing, for example, blocks of digital processing at that mentioned blocks of digital processing perform processing of sequence of stereo images with different frequencies (high and low), to determine the presence of intruder, it's position and speed of transference.