A low-power-consumption and high efficiency security system for automatic detection of concealed objects in human body

Chinese security equipment market has been in a rapid growth, however traditional security apparatus have the problem, such as low efficiency, large energy consumption and so on. To address those problems, we introduce a new low-power-consumption and high efficiency system, named 94 GHz (1000 GHz=1THz) terahertz (THz) homeland security system developed by our team. It not only can acquire images of objects concealed underneath clothes, but also can automatically identify the concealed objects. Compare with traditional inspection methods for public security (e.g. metal detection door, X-ray detector, etc.), our new human security apparatus has simple structure, low power consumption and high work efficiency. In addition, this system can detect the non-metallic dangerous goods, such as ceramic knife, organic explosives and so on. In this paper, firstly we introduce our terahertz homeland security system and then introduce the efficient and real-time algorithm for automatic detection and segmentation of concealed objects from blurred THz images. Based on the experiment results, our algorithm can accurately detect and mark out the shape and location of the contraband (e.g. gun, knives, explosives, etc.) concealed under clothes.