Method and apparatus for spectral mixture resolution

Details Method and apparatus for spectral mixture resolution Method and apparatus for spectral mixture resolution

G - Physics

01

N

G01N 31/00 (2006.01)

Patent

CA 2604251

The spectral method for determining the concentrations of a substance in a mixture of any number ofsubstances is defined by a chemical image having a plurality of pixels (520). The method includes steps of providing a spectrum for each of the nnumber of substances in the mixture (530), and obtaining the spectrum for one of the plurality of pixels, and calculating a plurality of estimated concentrations of each substance in the mixture as a function of the spectrum for each substance and the spectrum for the pixel, and calculating a deviation value for each of the plurality of estimated concentrations as a function of the spectrum of each of the number of substances in the mixture, and selecting the estimated concentration with the lowest deviation factor as a most likely concentration of each substance in the mixture (550).

La présente invention concerne un procédé spectral permettant de déterminer les concentrations d'une substance dans un mélange contenant un nombre quelconque de substances, lequel procédé est défini par une image chimique comportant une pluralité de pixels (520). Le procédé comprend les étapes consistant: à fournir un spectre pour chacune des n substances contenues dans le mélange (530); à obtenir le spectre pour un des pixels; à calculer une pluralité d'estimations de concentrations de chaque substance du mélange en fonction du spectre pour chaque substance et du spectre pour le pixel; à calculer une valeur d'écart pour chacune des estimations de concentrations en fonction du spectre de chacune des substances du mélange; et à sélectionner l'estimation de concentration présentant le plus petit facteur d'écart comme concentration la plus probable de chaque substance dans le mélange (550).

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