TeraSCREEN proposes to develop an innovative concept of multi-frequency multi-mode Terahertz (THz) detection with new automatic detection and classification functionalities. The system developed will demonstrate, at a live control point in Madrid-Barajas International Airport, the safe automatic detection and classification of objects concealed under clothing, whilst respecting privacy and increasing current throughput rates. This innovative screening system will combine multi-frequency images taken by passive and active imagers which will scan the subjects and obtain complementary information, thus allowing for automatic threat recognition.
The TeraSCREEN concept is to combine existing mm-wave and Terahertz technologies with project developments in the same field, to enhance current safe, security screening capabilities by providing automatic object classification in addition to detection.
The combination of several operating frequencies can show up differences between materials in the scene, as the emissive, transmissive, reflective and scattering properties of materials change with frequency. Thus the use of several passive frequencies can increase the detection capability of concealed objects, in addition to providing a first step towards object classification.
Active imaging in this frequency band is safe, and complements passive detection by providing high image resolution and depth information. This additional shape and depth information of the detected objects, provided by resolving time of flight, can also be used for object classification.
The combination of the passive, multi-frequency subsystem and the active subsystem will produce a completely innovative prototype imaging system. The information provided by this system will be automatically processed and presented to the operator in a way that respects privacy.
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