System for identifying materials by NIR spectrometry

Details System for identifying materials by NIR spectrometry System for identifying materials by NIR spectrometry

1996-05-13

1998-10-13

Trammell, James P.

Boots, shoes, and leggings

364497, 356303, G06F 1900

Patent

active

058222197

ABSTRACT:
In a method for identifying an unknown product a library of absorbance spectra of known products is measured and stored in a library. A quick search using clustering techniques is conducted to narrow the search to a few products, followed by an exhaustive search of the spectra of the few products. More specifically, principal component analysis is applied to the absorbance spectra to generate product score vectors extending into principal component inside model space which are divided into clusters and subclusters in accordance with their relative proximity. Hyperspheres are constructed around each vector and an envelope is constructed to enclose each cluster surrounding the hyperspheres within the cluster. The absorbance spectrum of the unknown product to be identified is measured and an unknown product score vector is determined from the unknown product spectrum projecting in principal component inside model space of the clusters. It is determined whether or not the unknown product score vector falls within one of the envelopes and if so the product score vector is projected into the principal component inside model space of that cluster and it is determined whether or not the unknown product score vector falls within any of the subclusters divided from the cluster. This process is repeated until the unknown product score vector is found to lie in a cluster which is not further subdivided. In this manner, the search is narrowed to a few products. An exhaustive search is then carried out to match the spectrum of the unknown product with the spectra of the known products corresponding to the undivided subcluster.

REFERENCES:
patent: 4766551 (1988-08-01), Begley
patent: 4885697 (1989-12-01), Hubner
patent: 5121337 (1992-06-01), Brown
patent: 5121338 (1992-06-01), Lodder
patent: 5124932 (1992-06-01), Lodder
patent: 5205701 (1993-04-01), Taylor
patent: 5223715 (1993-06-01), Taylor
patent: 5311445 (1994-05-01), White
patent: 5606164 (1997-02-01), Price et al.

Affiliated with

Also associated with

Rating

System for identifying materials by NIR spectrometry does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for identifying materials by NIR spectrometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for identifying materials by NIR spectrometry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-319971