Makino, Y., Isami, A., Suhara, T., Goto, K., Oshita, S., Kawagoe, Y., Kuroki, S., Purwanto, Y.A., Ahmad, U. and Sutrisno (2015) Nondestructive Evaluation of Anthocyanin Concentration and Soluble Solid Content at the Vine and Blossom Ends of Green Mature Mangoes during Storage by Hyperspectral Spectroscopy. Food Science and Technology Research, 21, 59-65.
http://dx.doi.org/10.3136/fstr.21.59

has been cited by the following article:

• TITLE: A Grading Method for Mangoes on the Basis of Peel Color Measurement Using a Computer Vision System

  AUTHORS: Yoshio Makino, Kenjiro Goto, Seiichi Oshita, Akari Sato, Masato Tsukada

  KEYWORDS: Mangifera indica L., Nondestructive Analysis, Digital Camera, Anthocyanin

  JOURNAL NAME: Agricultural Sciences, Vol.7 No.6, June 6, 2016

  ABSTRACT: An objective grading method using a Computer Vision System (CVS) for mangoes is proposed. Red peel was selected using two types of color space values at chroma = 22 and hue angle = 52°. Eighteen out of 25 fully-ripened fruits were graded as “excellent,” determined by the share of red area per fruit being in the range of 80% - 100%. In contrast, all green-mature fruits were graded as “fair,” where the share of red area per fruit was - 0.0542x + 7.83), with a correlation coefficient accuracy of 0.94 and root mean square error of 1.31 mg·kg-1. This result may be effective for the visualization of anthocyanin distribution on mango skin. The threshold for red peel can be in the range of 131 - 186 mg·kg-1. This suggests that the pigment concentration is usable as a universal threshold. This value is unaffected by conditions for image acquisition or color measurement (e.g., light source, sensor, filter, and optical geometry), unlike color space values as hue angle.