For the manual inspection, colour values of the surfaces of banana peels were measured using a colorimeter (CR-400, Minolta Co., Osaka, Japan) calibrated using a standard white plate (L⁄ = 97.79, a⁄ = 0.38, b⁄ = 2.05).
For the manual inspection, colour values of the surfaces ofbanana peels were measured using a colorimeter (CR-400, MinoltaCo., Osaka, Japan) calibrated using a standard white plate(L⁄ = 97.79, a⁄ = 0.38, b⁄ = 2.05).