Investigations of concealed objects detection in visible, infrared and terahertz ranges

Assuring the safety of crowded public places like e.g. airports is one of the most serious social issues. One of the aspects of the problem is the detection of potentially dangerous objects hidden under a person's clothing. There are various solutions from simple metal detectors to X-ray scanners. Some of the available solutions are harmful to humans. There is a great potential in using multispectral surveillance imagers in security systems thus we investigate the possibilities of concealed object detection by screening people with non-invasive cameras working in various spectral ranges.