Active infrared nondestructive testing for glue occlusion detection in plastic cap

Thermal imaging is a powerful tool used by progressive companies across a wide range of industries and applications ranging from predictive maintenance to product development quality assurance. In cosmetic industry product quality control is an important stage of production. This paper deals with an active thermography vision system. It is used to detect the presence of glue occlusion in plastic lids. The experimental set-up is described. The images are processed so as to remove the noise and a segmentation stage is done using Wen´s threshold, followed by an erosion filter, 100 percent of the defects were detected by this prototype