Method of intruder detection and device thereof

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.