Method and system for unveiling hidden dielectric object
First Claim
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1. A method for unveiling hidden dielectric objects in an interrogated area, comprising:
- recording a 3D microwave image and a 3D optical range image of an interrogated scene at a same time moment, digitizing all images and overlapping them in one common coordinate system;
determining a distance between a microwave image and an optical image of a region, calculating a dielectric permittivity ∈
of a space based on the determined distance; and
concluding an absence of a hidden dielectric object where the dielectric permittivity is less than a threshold value.
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Abstract
The invention relates to the remote measurement of the dielectric permittivity of dielectrics. A 3D microwave and a 3D optical range images of an interrogated scene are recorded at the same time moment. The images are digitized and overlapped. A space between the microwave and optical image is measured, and a dielectric permittivity of the space between these images is determined. If the dielectric permittivity is about 3, then hidden explosive materials or components of thereof are suspected. The invention makes it possible to remotely determine the dielectric permittivity of a moving, irregularly-shaped dielectric objects.
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20 Claims
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1. A method for unveiling hidden dielectric objects in an interrogated area, comprising:
recording a 3D microwave image and a 3D optical range image of an interrogated scene at a same time moment, digitizing all images and overlapping them in one common coordinate system;
determining a distance between a microwave image and an optical image of a region, calculating a dielectric permittivity ∈
of a space based on the determined distance; and
concluding an absence of a hidden dielectric object where the dielectric permittivity is less than a threshold value.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system to unveil a hidden dielectric object in an interrogated area, comprising:
- at least two microwave (mw) sources and at least one mw receiver forming mw images of the interrogated area;
at least two optical range cameras recording the interrogated area;
a digital signal processor (DSP) receiving the microwave and optical images recorded at the same time and forming a three-dimensional (3D) microwave image and a 3D optical image of the interrogated area, both the 3D microwave image and 3D optical image are transferred into a common coordinate system and overlapped, and wherein a decision on an absence of hidden dielectric object is made after determining a distance between the microwave image and the optical image of the interrogated area, calculating a dielectric permittivity ∈
of a space based on the determined distance; and
the dielectric permittivity being less than a threshold value. - View Dependent Claims (17, 18, 19, 20)
- at least two microwave (mw) sources and at least one mw receiver forming mw images of the interrogated area;
Specification