Frequency-based surveillance imaging
First Claim
1. A method of surveilling a subject comprising:
- irradiating at least a portion of the subject with electromagnetic radiation in at least first and second different frequency ranges having frequencies that are more than about 100 MHz and less than about 2 THz;
receiving the irradiated electromagnetic radiation reflected from the subject;
producing, from the received electromagnetic radiation, first image data representative of a first image of at least the portion of the subject based at least in part on reflectivity of the electromagnetic radiation in the first frequency range;
producing, from the received electromagnetic radiation, at least second image data representative of at least a second image of at least the portion of the subject based at least in part on reflectivity of the electromagnetic radiation over at least the second frequency range; and
relating at least the first and second image data.
2 Assignments
0 Petitions
Accused Products
Abstract
A subject may be interrogated with electromagnetic radiation for producing image data representative of an image of the subject. First and second image data, produced based on reflectivity in first and second frequency ranges, may be related. In some examples, image data for one picture element may be produced based at least in part on reflectivity of the radiation at a depth selected based at least in part on a depth of another picture element. In some examples, plural images may be produced based on reflectivity at different depths. In some examples, a value of reflectivity may be determined for an intermediate depth between two adjacent depths of image data based at least in part on reflectivity of the radiation for a plurality of spaced-apart depths.
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Citations
21 Claims
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1. A method of surveilling a subject comprising:
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irradiating at least a portion of the subject with electromagnetic radiation in at least first and second different frequency ranges having frequencies that are more than about 100 MHz and less than about 2 THz;
receiving the irradiated electromagnetic radiation reflected from the subject;
producing, from the received electromagnetic radiation, first image data representative of a first image of at least the portion of the subject based at least in part on reflectivity of the electromagnetic radiation in the first frequency range;
producing, from the received electromagnetic radiation, at least second image data representative of at least a second image of at least the portion of the subject based at least in part on reflectivity of the electromagnetic radiation over at least the second frequency range; and
relating at least the first and second image data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An imaging system comprising:
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an interrogating apparatus configured to transmit toward and receive from a subject in a subject position, electromagnetic radiation in at least first and second frequency ranges having frequencies that are more than about 100 MHz and less than about 2 THz, the interrogating apparatus producing an image signal representative of the received radiation; and
a controller adapted to produce from at least a first portion of the image signal image data representative of a first image of at least a portion of the subject based at least in part on reflectivity of the electromagnetic radiation in the first frequency range, to produce from at least a second portion of the image signal, at least second image data representative of at least a second image of at least the portion of the subject based at least in part on reflectivity of the electromagnetic radiation over at least the second frequency range, and to relate the at least first and second image data. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. One or more storage media having embodied therein a program of commands adapted to be executed by a computer processor to:
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irradiate at least a portion of the subject with electromagnetic radiation in at least first and second different frequency ranges having frequencies that are more than about 100 MHz and less than about 2 THz;
receive the irradiated electromagnetic radiation reflected from the subject;
produce, from the received electromagnetic radiation, first image data representative of a first image of at least the portion of the subject based at least in part on reflectivity of the electromagnetic radiation in the first frequency range;
produce, from the received electromagnetic radiation, at least second image data representative of at least a second image of at least the portion of the subject based at least in part on reflectivity of the electromagnetic radiation over at least the second frequency range; and
relate at least the first and second image data.
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Specification