New algorithm for detection of dangerous objects hidden on a human body using passive THz camera

摘要

We discuss a correlation function using for developing of new algorithm that allows us to detect a hidden object without analyzing of image captured by the passive THz camera. Main idea of this approach concludes in correlation calculating between the image characteristics and corresponding characteristics of standard image. Obviously, a difference in temperature between a person body and object hidden under clothes takes place always. However, this difference can be invisible for human eyes. Using the correlation function we can increase a contrast between two objects and this allows to see an object or to produce alarm by computer. We discuss a choice of standard image characteristics for an achievement of correlation function for high contrast. Other feature of our approach arises from a possibility of a person image coming to the THz camera by using a computer processing of the image only. It means that we can "decrease" a distance between a person and the passive THz camera. This algorithm is very convenient for using and has a high performance.