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Optical Engineering

Neural network classification of wheat using single kernel near-infrared transmittance spectra
Author(s): Huaipu Song; Stephen R. Delwiche; Yud-Ren Chen
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Paper Abstract

To investigate an accurate, rapid, and nondestructive method for wheat classification in inspection terminals, backpropagation neural network models were developed, based on single wheat kernel near-infrared transmittance spectra. Six classes of wheat were studied. Neural network models were optimized for two-class and six-class classification. The wavelength range of the spectra was 850 to 1049 nm. For two-class models with 200 input nodes, the average classification accuracy was 97% to 100%. For the six-class model with 200 input nodes, the average accuracy was 94.7%. The classification between hard red winter (HRW) and hard red spring (HRS) was least accurate among the six classes. For rapid classification, a narrower wavelength range, 899 to 1049 nm, with an interval of 2 nm, was proposed and shown to have little loss in accuracy. The most time-consuming two-class (HRW-HRS) model could be calibrated and validated in less than 7 mm. Prediction for new data was nearly instantaneous. A backpropagation neural network model with a learning coefficient of 0.6 to 0.65 and momentum of 0.4 to 0.45, without a hidden layer, was effective for wheat classification.

Paper Details

Date Published: 1 October 1995
PDF: 8 pages
Opt. Eng. 34(10) doi: 10.1117/12.210745
Published in: Optical Engineering Volume 34, Issue 10
Show Author Affiliations
Huaipu Song, USDA Agricultural Research Service (United States)
Stephen R. Delwiche, USDA Agricultural Research Service (United States)
Yud-Ren Chen, USDA Agricultural Research Service (United States)

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