This study aimed at setting up a computer digital image analysis (CIA) procedure able to measure areas of cross-sectioned dry cured hams and to investigate sources of variation of measures of lean and fat areas. Digital images have been acquired on 279 cross-sectioned S. Daniele hams following standard procedures by means of a digital camera. Images were analysed according to 3 methods (automatic, semiautomatic, manual) using a software able to measure: a) the entire ham section area; 2) the 'fat-eye' area (FEA, area of fat depots placed in the middle of the ham surface); 3) the 'lean' ham area. Three operators, each performing 3 replicates per image per method of CIA, have been involved and data (7,533 records) were analysed by ANOVA. Results suggest that CIA seems a method suitable for measuring areas of cross-section of dry cured hams and variability in FEA appeared high. As operator effects significantly affected measures, further analyses are needed to study repeatability and reproducibility of measurements
Fatty areas in cured hams measured by computer image analysis. 1. Methodology
GALLO, LUIGI;CARNIER, PAOLO;
2001
Abstract
This study aimed at setting up a computer digital image analysis (CIA) procedure able to measure areas of cross-sectioned dry cured hams and to investigate sources of variation of measures of lean and fat areas. Digital images have been acquired on 279 cross-sectioned S. Daniele hams following standard procedures by means of a digital camera. Images were analysed according to 3 methods (automatic, semiautomatic, manual) using a software able to measure: a) the entire ham section area; 2) the 'fat-eye' area (FEA, area of fat depots placed in the middle of the ham surface); 3) the 'lean' ham area. Three operators, each performing 3 replicates per image per method of CIA, have been involved and data (7,533 records) were analysed by ANOVA. Results suggest that CIA seems a method suitable for measuring areas of cross-section of dry cured hams and variability in FEA appeared high. As operator effects significantly affected measures, further analyses are needed to study repeatability and reproducibility of measurementsPubblicazioni consigliate
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