A Study on the Detection of Jamming in Sealing Food Package by Image Processing -Detection of Jamming in Sealing Aluminum Vacuum Metallized Film Package

The purpose of this study is to detect jamming in sealing aluminum vacuum metallized film packaging for food material. Two types of package are examined; one is unpigmented silver packaging and the other is red colored. The detection algorithm developed in this study consists of the following methods: capturing 24 bit image data of the package's seal area; decomposition of the RGB components (8 bits each); determination of the seal area, gray scale transformation, FFT, image denoising by a mask operation, IFFT, edge treatment and binary conversion by applying a brightness threshold. The optimum brightness threshold is calculated by discriminant analysis. The combined optimum brightness thresholds for the detection of jamming in unpigmented silver packaging are a brightness threshold of 55 and a threshold of 35 using the B-component of the image data. The discrimination ratio of the jamming package is 99.6% under the above conditions. For red colored packages, the optimum brightness thresholds for detecting jamming are a brightness threshold of 60 and a brightness threshold of 43 using the B-component of the image data, giving a discrimination ratio of 94.3%. It was showed that the detection of jamming in sealing food packages is possible by the detection systems developed in this study.