Patent Document ID: 20050180634
Application ID: 10510078
Patent Status: 0

Claim One:
1. A method of identifying endmember spectra values from multispectral image data, where each multispectral data value is equal to a sum of mixing proportions of each endmember spectrum, said method including the steps of: processing the data to obtain a multidimensional simplex having a number of vertices equal to the number of endmembers, the position of each vertex representing a spectrum of one of the endmembers, wherein processing the data includes: providing starting estimates of each endmember spectrum for each image data value; estimating the mixing proportions for each data value from estimates of the spectra of all the endmembers; estimating the spectrum of each endmember from estimates of the mixing proportions of the spectra of all the endmembers for each image data value; repeating estimation steps until a relative change in the regularised residual m of squares is sufficiently small, the regularised residual sum of squares including a term which is a measure of the size of the simplex.