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Nondestructive determination of soluble solids content and pH in red bayberry (Myrica rubra) based on color space

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Abstract

Color has strong relationship with food quality. In this paper, partial least square regression (PLSR) and least square-support vector machine (LS-SVM) models combined with six different color spaces (NRGB, CIELAB, CMY, HSI, I1I2I3, and YCbCr) were developed and compared to predict pH value and soluble solids content (SSC) in red bayberry. The results showed that PLSR and LS-SVM models coupled with color space could predict pH value in red bayberry (r = 0.93–0.96, RMSE = 0.09–0.12, MAE = 0.07–0.09, and MRE = 0.04–0.06). In addition, the minimum errors (RMSE = 0.09, MAE = 0.07, and MRE = 0.04) and maximum correlation coefficient value (r = 0.96) were found with the PLSR based on CMY, I1I2I3, and YCbCr color spaces. For predicting SSC, PLSR models based on CIELAB color space (r = 0.90, RMSE = 0.91, MAE = 0.69 and MRE = 0.12) and HSI color space (r = 0.89, RMSE = 0.95, MAE = 0.73 and MRE = 0.13) were recommended. The results indicated that color space combined with chemometric is suitable to non-destructively detect pH value and SSC of red bayberry.

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Acknowledgements

This study was funded by Zhejiang Provincial Top Key Discipline of Biology, Zhejiang Provincial Universities Key Discipline of Botany and the Natural Science Foundation of Zhejiang Province (LQ19C160003).

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Author notes

  1. Jie Feng, Lingling Jiang and Jialei Zhang have contributed equally to this work.

Authors and Affiliations

  1. College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, 310018, China

    Jie Feng, Jialei Zhang, Yanfang Sun, Shaoning Chen, Meilan Yu, Wei Hu & Hongfei Lu

  2. Zhejiang Province Key Laboratory of Plant Secondary Metabolism and Regulation, Hangzhou, 310018, China

    Jie Feng, Jialei Zhang, Yanfang Sun, Shaoning Chen, Meilan Yu, Wei Hu & Hongfei Lu

  3. School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, China

    Lingling Jiang & Hong Zheng

  4. School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, 310023, China

    Defa Shi

  5. Yuanpei College, Shaoxing University, Shaoxing, 312000, China

    Xiaohong Sun

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  1. Jie Feng
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  2. Lingling Jiang
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  3. Jialei Zhang
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  4. Hong Zheng
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  5. Yanfang Sun
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  7. Meilan Yu
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  8. Wei Hu
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  9. Defa Shi
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  10. Xiaohong Sun
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Correspondence to Xiaohong Sun or Hongfei Lu.

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Feng, J., Jiang, L., Zhang, J. et al. Nondestructive determination of soluble solids content and pH in red bayberry (Myrica rubra) based on color space. J Food Sci Technol 57, 4541–4550 (2020). https://doi.org/10.1007/s13197-020-04493-4

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  • DOI: https://doi.org/10.1007/s13197-020-04493-4

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