Patent ID: 7283684

Claim:
A method for analyzing multivariate images, comprising: a) providing a data matrix D containing measured spectral data, b) reading an i th block of data D i of a total of j data blocks from the data matrix D into the memory of a computer, c) computing a block crossproduct matrix D i T D i from the data block D i , d) adding the block crossproduct matrix D i T D i to an accumulation of the block crossproduct matrices, e) repeating steps b) through d) until all j of the data blocks D i of the data matrix D are read, providing a crossproduct matrix D T D, f) performing an eigenanalysis of the crossproduct matrix to obtain eigenvectors V and eigenvalues E, g) computing a loadings matrix P, according to P=V, h) computing a scores matrix T, according to T=DP, and i) performing an image analysis of TP T to obtain a concentration matrix C and a spectral shapes matrix S.