New Zealand Journal of Crop and Horticultural Science abstracts

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Use of near infrared spectra to identify cultivar in potato (Solanum tuberosum) crisps

N. Yee
W. T. Bussell

School of Natural Sciences
Unitec New Zealand
Private Bag 92 025
Auckland, New Zealand
email: nyee@unitec.ac.nz

G. G. Coghill

Department of Electrical Engineering
The University of Auckland
Private Bag 92 019
Auckland, New Zealand

Abstract Near infrared spectra were collected of potato crisps from potato (Solanum tuberosum) cultivars ‘Whitu’ and ‘Fianna’. Pattern recognition techniques were used to classify the spectra. Linear discriminant analysis performed as well as piecewise linear discriminant analysis in identifying the potato tuber variety used to produce the potato crisps. The success rate in separating the spectra into respective classes using discriminant analysis is 93%. This suggests that it is possible to use near infrared analysis for the purpose of identifying different cultivars in single batches of potato crisps.

Keywords Whitu; Fianna; piecewise linear discriminant analysis; classification

New Zealand Journal of Crop and Horticultural Science, 2006, Vol. 34: 177–181
0014–0671/06/3402–0177      © The Royal Society of New Zealand 2006
H05064; Online publication date 27 April 2006. Received 13 June 2005; accepted 8 March 2006

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