Patent ID: 7709796

Claim:
A system for detecting the presence of selected materials, the system comprising: an image acquisition device receiving electromagnetic radiation from an emitting body and acquiring an image of the emitting body from the received electromagnetic radiation; a filter assembly comprising a plurality of filters, said filter assembly disposed between the emitting body and said image acquisition device; each filter from said plurality of filters in said filter assembly allowing transmission in substantially a predetermined range of wavelengths, one filter from said plurality of filters being disposed to allow transmission of electromagnetic radiation to said image acquisition device; a feature extraction component, said feature extraction component identifying at least one region in said image, said feature extraction component receiving said image of the emitting body from said image acquisition device, said image of the emitting body corresponding to transmission of electromagnetic radiation, emitted by the emitting body, through one filter from said plurality of filters; an analysis component receiving said at least one region, said analysis component obtaining characteristics of said at least one region in at least one predetermined image, said at least one predetermined image corresponding to transmission of electromagnetic radiation, emitted by the emitting body, through at least one predetermined filter from said plurality of filters, and providing at least one output image of said at least one region in said at least one predetermined image; said at least one output image being at least one image of a region of interest for detecting presence of predetermined materials; a database of wavelength spectrum data corresponding to at least one material from said predetermined materials; said predetermined materials comprising explosives; and a detection component receiving said at least one output image of said least one region in said at least one predetermined image from said analysis component and the wavelength spectrum data from said database and also detecting presence of said at least one material by comparing said at least one image of said at least one region to the wavelength spectrum data.