Abstract
An image analysis was proposed to estimate color changes of broccoli in plastic films. Fresh broccoli was packaged with perforated low density polyethylene (P-PE), non-perforated low density polyethylene (PE: film thickness 18.7μm) and polypropylene (PP: film thickness 30.1μm), and stored at 15°C, 90% RH. Surface color data of the broccoli florets were taken by RGB color system (512×480 pixels, 8bits). Transformation of the color data to Munsell color system using hue, chromaticness and lightness was proved to be effective to eliminate the various interference caused by the packaging film. Estimation of color changes using the image analysis was more closely correlative with sensory score than pigment contents including chlorophyll and carotenoid, and the Hunter Lab value.
