Patent US 9,953,239

A method of monitoring a space for armed and dangerous individuals comprises obtaining a series of digital images of the space via a first digital camera; detecting a series of ambient noise levels of the space via an electronic noise detecting device; processing the series of images; processing the series of ambient noise levels; checking for an armed and dangerous individual; and triggering an alarm signal. Processing the series of images may include comparing objects in a first image of the series of images to at least one predetermined weapon patterns; and comparing objects in the first image of the series of images to at least one predetermined human patterns. Processing the series of ambient noise levels may include determining an upper threshold noise level based on the series of ambient noise levels; and comparing a first ambient noise level to the upper threshold noise level.