Determination of freshness of UHT milk with L * a * b * color parameters measured by image processing

Document Type : Research Article

Authors

1 MSc Student of Agricultural Machinery, Faculty of Agriculture, Shahrekord University, Chahar Mahal and Bakhtiari

2 Assistant Professor, Department of Biosystems Mechanical Engineering, Faculty of Agriculture, Shahrekord University, Chahar Mahal and Bakhtiari

3 Associate Professor, Department of Biosystems Mechanical Engineering, Faculty of Agriculture, Shahrekord University, Chahar Mahal and Bakhtiari

4 Associate Professor, Department of Food Hygiene, Faculty of Veterinary Medicine, Shahrekord University, Chahar Mahal and Bakhtiari

Abstract

In this study the possibility of determining the shelf life of UHT milk with determininig the L * a * b * color indexes were investigated using image processing. Therefore purchased milk was stored in an incubator at ambient temperature (25±5˚ C) for six months. The imaging and image processing operations was performed to extract mean color parameter of the channel L, a * and b * of color system CIELab. The results indicate significant changes in mean color parameters of the three components of the L, a * and b * during storage of UHT milk. To determine the shelf life of UHT milk, extracted color features were applied as inputs to an artificial neural network linked with genetic algorithms. All programming for image processing and neural-genetic model was performed using Matlab software version R2013a. Neuro-genetic model with the correlation coefficient greater than 0.95 and the mean square error of 0.075 successfully tested in determining the freshness of UHT milk.

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Main Subjects


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