Multispectral signature extraction technique
AssigneeTRW Inc.
InventorsJoseph M. Denny, Eric L. Upton
Life of this patent
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Abstract
A method and apparatus for separating or extracting a desired multispectral optical signal of interest from a background. Radiation is detected from a scene which includes the multispectral optical signal of interest and the background. A multiplicity of wavelength bands are selected from the detected radiation to generate a multispectral input spectrum. The multispectral input spectrum is processed to separate the multispectral optical signal of interest from the background.
Claims23
A method of extracting a desired multispectral optical signal of interest from a background comprising the steps of:
- a) detecting multispectral optical radiation from a scene which includes the signal of interest and the background;
- b) selecting a multiplicity of wavelength bands from the detected radiation to generate a multispectral input spectrum;
- and
- c) processing the selected bands of the input spectrum to decompose the input spectrum into separate multispectral signals representing the background and the signal of interest if present within the input spectrum.
Apparatus for extracting a desired multispectral optical signal of interest from a background, said apparatus comprising:
- detecting means for detecting multispectral optical radiation, in the 0.2-30 micron wavelength range, from a scene which includes the signal of interest and the background;
- means for selecting a plurality of wavelength bands from the detected radiation to generate a multispectral input spectrum;
- and
- processing means for processing the multispectral input spectrum to separate the signal of interest from the background.
An apparatus for separating a multispectral optical target from a background comprising:
- an input for receiving a multispectral input spectrum containing both target and background information;
- a first channel means, coupled to the input, for separating said background from the multispectral input spectrum;
- a second channel means, coupled to the input, for separating said target from the multispectral input spectrum;
- said first and second channel means operating on the multispectral input spectrum to respectively generate outputs which are functions of the degree of correlation between the presence of background and target multispectral signatures in the spectrum;
- and
- a feedback path interconnecting outputs of said first and second channels to said input.
Dependencies are inferred from the claim text.