The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 2014
Filed:
May. 03, 2010
Mehdi Alouini, Gosne, FR;
Arnaud Beniere, Massy, FR;
Daniel Dolfi, Orsay, FR;
Gérard Berginc, Thiais, FR;
François Goudail, Palaiseau, FR;
Mehdi Alouini, Gosne, FR;
Arnaud Beniere, Massy, FR;
Daniel Dolfi, Orsay, FR;
Gérard Berginc, Thiais, FR;
François Goudail, Palaiseau, FR;
Thales, Neuilly sur Seine, FR;
Institut D'Optique, Palaiseau Cedex, FR;
Abstract
Techniques for identifying images of a scene including illuminating the scene with a beam of 3 or more wavelengths, polarized according to a determined direction; simultaneously acquiring for each wavelength an image X(λ) polarized according to said direction and an image X(λ) polarized according to a direction perpendicular to said direction, X(λ) being spatially distinct from X(λ); calculating for each wavelength an intensity image which is a linear combination of X(λ) and X(λ), providing an intensity spectrum for each pixel; calculating for each wavelength a polarization contrast image on the basis of an intensity ratio calculated as a function of X(λ) and of X(λ), providing a polarization contrast spectrum for each pixel; and calculating a spectro-polarimetric contrast image of the scene, each pixel of this spectro-polarimetric contrast image calculated based on the intensity spectrum and the contrast spectrum of the pixel considered.