Patent ID: 8655017

Claim:
A method for identifying images of a scene, the method comprising: illuminating the scene with a beam of N wavelengths, polarized according to a determined direction, N being an integer greater than or equal to 3; simultaneously acquiring for each wavelength an image X // (λ i ) polarized according to said direction and an image X ⊥ (λ i ) polarized according to a direction perpendicular to said direction, these images X ⊥ (λ i ) being spatially distinct from the images X // (λ i ); calculating for each wavelength an intensity image which is a linear combination of X // (λ i ) and X ⊥ (λ i ), these N intensity images providing for each pixel an intensity spectrum; calculating for each wavelength a polarization contrast image on the basis of an intensity ratio calculated as a function of X // (λ i ) and of X ⊥ (π i ), these N polarization contrast images providing for each pixel a polarization contrast spectrum; 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.