Depth-based surveillance imaging
AssigneeSafeView, Inc.
InventorMichael Fleisher
Life of this patent
Estimating the term…
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.
Claims22
A method of surveilling a subject comprising:
- irradiating at least a portion of the subject with electromagnetic radiation having one or more frequencies between about 100 MHz and about 2 THz;
- receiving the irradiated electromagnetic radiation reflected from the subject;
- producing, from the received electromagnetic radiation, at least first image data representative of at least the portion of the subject based at least in part on reflectivity of the electromagnetic radiation for a plurality of depths for each of a plurality of picture elements;
- selecting a first depth for each of the plurality of picture elements based at least in part on the reflectivity of the electromagnetic radiation for at least a picture element;
- producing at least second image data representative of at least a first image of at least the portion of the subject corresponding to the first depth for each of the plurality of picture elements;
- selecting at least a second depth for each of the plurality of picture elements based at least in part on the first depth of at least a picture element;
- and
- producing at least third image data representative of at least a second image of at least the portion of the subject corresponding to the second depth for each of the plurality of picture elements.
An imaging system comprising:
- an interrogating apparatus configured to transmit toward and receive from a subject in a subject position, electromagnetic radiation having one or more frequencies between about 100 MHz and about 2 THz, the interrogating apparatus producing an image signal representative of the received radiation;
- and
- a controller adapted to produce, from the received electromagnetic radiation, at least first image data representative of at least the portion of the subject based at least in part on reflectivity of the electromagnetic radiation for a plurality of depths for each of a plurality of picture elements, to select a first depth for each of the plurality of picture elements based at least in part on the reflectivity of the electromagnetic radiation for at least a picture element, to produce at least second image data representative of at least a first image of at least the portion of the subject corresponding to the first depth for each of the plurality of picture elements, to select at least a second depth for each of the plurality of picture elements based at least in part on the first depth of at least a picture element, and to produce at least third image data representative of at least a second image of at least the portion of the subject corresponding to the second depth for each of the plurality of picture elements.
Dependencies are inferred from the claim text.