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Proceedings Paper

Nondestructive measurement soluble solids content of apple by portable and online near infrared spectroscopy
Author(s): Xudong Sun; Hailiang Zhang; Yuanyuan Pan; Yande Liu
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Paper Abstract

Two different near infrared spectrometric systems were used to determine soluble solids content (SSC) of intact apple, including a portable near infrared (NIR) spectrometer and an online NIR system. The pretreatment methods were applied to improve the predictive results. The moving average smoothing was significant. The effective wavelength regions were chosen by interval partial least squares (iPLS) and backward iPLS (Bipls). Then the models were developed by partial least square regression (PLSR) and least square support machine (LS-SVM). Performance comparisons were made in the context of 30 unknown samples prediction. The LS-SVM models were better than others with correlation coefficient (R) and root mean square error of prediction (RMSEP) of (0.88, 0.80ºBrix) and (0.82, 1.01ºBrix) for portable and online measurement mode, respectively. The results demonstrated that the online measurement mode was not as well as the portable.

Paper Details

Date Published: 29 October 2009
PDF: 7 pages
Proc. SPIE 7514, Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors, 75140P (29 October 2009); doi: 10.1117/12.843390
Show Author Affiliations
Xudong Sun, East China Jiatong Univ. (China)
Hailiang Zhang, East China Jiatong Univ. (China)
Yuanyuan Pan, East China Jiatong Univ. (China)
Yande Liu, East China Jiatong Univ. (China)


Published in SPIE Proceedings Vol. 7514:
Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors

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