Department of Food and Agricultural Process Engineering, Tamil Nadu Agricultural University, Coimbatore, India.
Journal of Applied Horticulture, 2015, volume 17, issue 3, pages 205-209.
Abstract: Machine dependent (RGB) and machine independent (CIE-Lab) colours were measured during ripening of Banganapalli mangoes, at 24 h interval and evaluated throughout the ripening period. The machine dependent colour coordinates red (R), green (G) and blue (B) were extracted from the digital images of mangoes taken every day. All the colour coordinates were increasing significantly during the ripening of mango. In total colour difference, major change was observed during 10th day. A steep rise was found in hue angle between 10-11th day of ripening. Croma was increasing up to 20th day and started decreasing. It was found that, the R and G would be more suitable to predict the ripening colour change rather than B value. In case of ratios, the red ratio (R/B), the green ratio (G/B) and both blue ratios would be suitable to predict the ripening of mangoes. These observation could be used as one of the nondestructive tool for mango quality evaluation, mango ripening and optimization studies.