Nondestructive measurement soluble solids content of apple by portable and online near infrared spectroscopy

Xudong Sun; Hailiang Zhang; Yuanyuan Pan; Yande Liu

doi:10.1117/12.843390

28 October 2009 Nondestructive measurement soluble solids content of apple by portable and online near infrared spectroscopy

Xudong Sun, Hailiang Zhang, Yuanyuan Pan, Yande Liu

Author Affiliations +

Proceedings Volume 7514, Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors; 75140P (2009) https://doi.org/10.1117/12.843390
Event: Photonics and Optoelectronics Meetings 2009, 2009, Wuhan, China

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.

Citation Download Citation

Xudong Sun, Hailiang Zhang, Yuanyuan Pan, and Yande Liu "Nondestructive measurement soluble solids content of apple by portable and online near infrared spectroscopy", Proc. SPIE 7514, Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors, 75140P (28 October 2009); https://doi.org/10.1117/12.843390

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