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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 8, Iss. 3 — Apr. 4, 2013

Spectral data mining for rapid measurement of organic matter in unsieved moist compost

Somsubhra Chakraborty, David C. Weindorf, Md. Nasim Ali, Bin Li, Yufeng Ge, and Jeremy L. Darilek  »View Author Affiliations


Applied Optics, Vol. 52, Issue 4, pp. B82-B92 (2013)
http://dx.doi.org/10.1364/AO.52.000B82


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Abstract

Fifty-five compost samples were collected and scanned as received by visible and near-IR (VisNIR, 350–2500 nm) diffuse reflectance spectroscopy. The raw reflectance and first-derivative spectra were used to predict log 10 -transformed organic matter (OM) using partial least squares (PLS) regression, penalized spline regression (PSR), and boosted regression trees (BRTs). Incorporating compost pH, moisture percentage, and electrical conductivity as auxiliary predictors along with reflectance, both PLS and PSR models showed comparable cross-validation r 2 and validation root-mean-square deviation (RMSD). The BRT–reflectance model exhibited best predictability (residual prediction deviation = 1.61 , cross-validation r 2 = 0.65 , and RMSD = 0.09 log 10 % ). These results proved that the VisNIR–BRT model, along with easy-to-measure auxiliary variables, has the potential to quantify compost OM with reasonable accuracy.

© 2013 Optical Society of America

OCIS Codes
(130.6010) Integrated optics : Sensors
(300.6340) Spectroscopy : Spectroscopy, infrared
(280.1415) Remote sensing and sensors : Biological sensing and sensors

History
Original Manuscript: July 10, 2012
Revised Manuscript: December 23, 2012
Manuscript Accepted: December 23, 2012
Published: January 30, 2013

Virtual Issues
Vol. 8, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Somsubhra Chakraborty, David C. Weindorf, Md. Nasim Ali, Bin Li, Yufeng Ge, and Jeremy L. Darilek, "Spectral data mining for rapid measurement of organic matter in unsieved moist compost," Appl. Opt. 52, B82-B92 (2013)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-52-4-B82

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