Patent ID: 6353673
Filing Date: 2002-03-05
Classification: G06K,G06T

Abstract:
A method of real-time optical processing of images by simultaneously combining a variable set of images in various orientations of light polarization and in selected spectral intervals comprising the steps of:turning a liquid crystal achromatic rotator of light polarization off; selecting a set of spectral intervals; adjusting transmitting spectrum of an optical filter to a first selected spectral interval; acquiring a spectral image through the adjusted optical filter; turning the liquid crystal achromatic rotator of light polarization on; repeating the above steps for orthogonal light polarizations, for each selected spectral interval; defining an object area; extracting object and background spectral-polarimetric parameters from the set of spectral-polarimetric images; calculating an optimal set of weight coefficients for each spectral-polarimetric interval satisfying application criteria; adjusting a filter transmission spectrum to positive weight coefficients for corresponding spectral intervals to create a positive filter; capturing an image through the positive filter at a relevant polarization; adjusting a filter transmission spectrum to negative weight coefficients for corresponding spectral intervals to create a negative filter; capturing an image through the negative filter at a relevant polarization; subtracting the image captured through the negative filter from the image captured through the positive filter; recording and displaying the resulting image.