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Transfer by orthogonal projection: making near-infrared calibrations robust to between-instrument variation

Andrew, A; Fearn, T; (2004) Transfer by orthogonal projection: making near-infrared calibrations robust to between-instrument variation. CHEMOMETR INTELL LAB , 72 (1) 51 - 56. 10.1016/j.chemolab.2004.02.004.

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Abstract

The ability to transfer calibrations between near-infrared instruments is important for the acceptance and spreading of the technology. A method called transfer by orthogonal projection (TOP) is proposed for deriving calibrations that are robust to between-instrument variation, and thus may be transferred without adjustment. The idea is to orthogonalise the calibration spectra to directions in the spectral space in which most between-instrument variability lies. The method is related to the idea of a repeatability file, but has advantages over that approach when factor-based methods are used for calibration. Two examples are presented. In both of these, a calibration is successfully transferred to instruments not involved at all in its derivation. (C) 2004 Elsevier B.V. All rights reserved.

Type:Article
Title:Transfer by orthogonal projection: making near-infrared calibrations robust to between-instrument variation
DOI:10.1016/j.chemolab.2004.02.004
Keywords:calibration transfer, instrument standardisation, near-infrared, orthogonal projection, repeatability file, STANDARDIZATION
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Statistical Science

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