Method of processing and correcting spectral data in two-dimensional representation
AssigneeKurashiki Boseki Kabushiki Kaisha
InventorKatsue Koashi
Life of this patent
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Abstract
The present method of processing spectral data calculates the first to fourth derivative spectra of an original spectrum with respect to the wavenumber and creates a two-dimensional representation by plotting coordinates consisting of the derivative values of some order as their abscissas and the original spectral values or derivative values of another order different from that order as their ordinates. In this two-dimensional plotting, maximal points, minimal points, maximal slope points (inflection points) and the like are clearly represented, so that a great amount of accurate feature information about the analyzed object can be easily obtained.
Claims17
A method of processing spectral data in two-dimensional representation comprising the steps of:
- preparing spectral data as an output signal of a spectrometer for a predetermined analyzed object, intensity of said output signal being expressed as a function of time, wavenumber or wavelength thereof;
- calculating values of n.sub.1 th derivative and n.sub.2 th derivative of said output signal intensity at a plurality of points on a spectral profile of said spectral data with respect to time, wavenumber or wavelength thereof, said n.sub.1 and n.sub.2 being two positive integers different to each other;
- forming a two-dimensional derivative spectral profile of said spectral data by plotting coordinates (u, v) consisting of the n.sub.1 th derivative value u and the n.sub.2 th derivative value v corresponding to the varying wavenumber in a two-dimensional coordinate space, and
- obtaining desired feature information about said spectral data, based on said two-dimensional derivative spectral profile.
Dependencies are inferred from the claim text.