Patent ID: 7119731
Filing Date: 2006-10-10
Classification: G01S,G06K

Abstract:
1. 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.