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QUALITY CHARACTERIZATION OF WINE CORK STOPPERS USING COMPUTER VISION

Costa, A.;Pereira, H. Journal International des Sciences de la Vigne et du Vin France, 2005, 39 (4) 209-218

Image analysis techniques were applied on the surface of wine cork stoppers (tops and lateral cylindrical surface) of seven commercial quality classes to characterize their porosity. An increasing trend from the best to the worst quality classes was found for features related to area of pores (i.e. maximum length and width or pore maximum area) and concentration variables (i.e. porosity coefficient or number of pores per 100 cm2). Shape variables were rather constant and mean values showed no differences between quality classes. Variation of the pores characteristics within each quality class was large especially in the mid-quality range. Therefore there were no statistically significant differences to allow the isolation of quality classes and overlapping was particularly important in the medium-quality classes. The reduction of grading into only three quality classes allowed to isolate statistically different subsets based on porosity coefficient and number of pores per 100 cm2. These variables can be selected for further development into quality grade specification of wine cork stoppers. This article was published in full in the Journal International des Sciences de la Vigne et du Vin France, 2005, 39 (4) 209-2
Published on 23/07/2006
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