Resolution enhancing of commercially available passive THz cameras due to computer processing

摘要

As it is well-known, application of the passive THz camera for the security problems is very promising way. It allows seeing concealed object without contact with a person and this camera is non-dangerous for a person. Efficiency of using the passive THz camera depends on its temperature resolution. This characteristic specifies possibilities of the detection for concealed object: minimal size of the object; maximal distance of the detection; image detail. Using computer processing of the THz image of objects concealed on the human body, one may many times improve this image and see clothes details. Consequently, the instrumental resolution of such device may be increased without any additional engineering efforts. We demonstrate new opportunities for the detection both of concealed objects and of clothes components due to using of computer processing of images captured by passive THz cameras, manufactured by various companies. Computer processing of images results in a temperature resolution enhancing of cameras. Therefore, a potential of using the passive THz camera may be many times increased by applying a modern algorithm of computer processing developed for such kind of the image. We consider images produced by THz passive cameras manufactured by Microsemi Corp., and ThruVision Corp., and Capital Normal University (Beijing, China).