Abstract
A new nondestructive optical method, based upon near infrared and visible interactancespectroscopy, was developed for rapid determination of flesh color in clingstone peaches. Themethod is suitable for flesh color grading tasks at inspection stations prior to canning and for on-linesorting tasks. A set of 617, fruit consisting of four Californian clingstone peach cultivars, werestudied. Multilinear regression models were developed to predict CIE hue angle of the flesh usingvisible and near infrared absorbance values measured in interactance mode on the intact fruit. Thisnon-destructive optical method predicted the flesh color with a standard error of calibration of 1.5degrees (hue angle).
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