Patent ID: 8670021

Claim:
A method for unveiling hidden dielectric objects in an interrogated area, comprising: recording a 3D microwave and a 3D optical range images of an interrogated scene at the same time moment, digitizing all images and overlapping them in one common coordinate system; determining a distance between the 3D microwave and 3D optical images, and concluding the absence of hidden dielectric object where the optical distance is less than a threshold value, the distance being determined via calculating a dielectric permittivity constant ∈; further comprising concluding the presence of hidden dielectric objects if cavities are observed in the three-dimensional microwave image, where the distance is more than a threshold value l, and the cavities depth h is greater than a depth threshold h 0 =l 0 (∈ 1/2 −1)/∈ 1/2 ).