期刊
ANALYTICA CHIMICA ACTA
卷 1280, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.aca.2023.341884
关键词
PCA; PLS; Multivariate curve resolution; MCR-ALS; Chemometrics Assisted Colour Histogram-based Analytical Systems (CACHAS); Fruit; Maturity index; Cell phone
This study proposes a methodology based on a color histogram-based analytical system to evaluate the ripeness of olives. Digital images can be used to analyze the color information of olives objectively and accurately, allowing for the prediction of their maturity index.
Digital images are commonly used to monitor processes that are based on colour changes due to their simplicity and easy capture. Colour information in these images can be analysed objectively and accurately using colour histograms. One such process is olive ripening, which is characterized by changes in chemical composition, sensory properties and can be followed by changes in physical appearance, mainly colour. The reference method to quantify the ripeness of olives is the Maturity Index (MI), which is determined by trained experts assigning individual olives into a colour scale through visual inspection. Instead, this study proposes a methodology based on Chemometrics Assisted Colour Histogram-based Analytical Systems (CACHAS) to automatically assess the MI of olives based on R, G, and B colour histograms derived from digital images. The methodology was shown to be easily transferable for routine analysis and capable of controlling the ripening of olives. The study also confirms the high potential of digital images to understand the ripening process of olives (and potentially other fruits) and to predict the MI with satisfactory accuracy, providing an objective and reproducible alternative to visual inspection of trained experts.
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