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. 2022 Jul 13;11(14):2086. doi: 10.3390/foods11142086

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Pearson correlation coefficients for the relationship between predictor and response variables were used in this study. Heat map (a) represents the relationship between colour space values of RGB images and response variables (TSS and pH); (b) represents the relationship between colour space values of HSV images and response variables (TSS and pH) and (c) represents the relationship between colour space values of HSL images and response variables (TSS and pH). The colour intensity in the matrix is proportional to the correlation coefficients.