On-line defects localization on mirror-like surfaces

This paper deals with an on line defects detection system. This system is used for controlling surfaces reflecting as mirror. The originality of this work is the lighting used and the filter used to process the images. Developed lighting is a structured one. It is composed of a succession of luminous and dark stripes. Using this lighting, defects appear clearly on the images. Images obtained with this specific lighting are particular and very contrasted, for these reason an original filter, very easy to implement has been developed to process them. This filter looks like a morphological filter. Conception of the operator has been done in accordance to the knowledge of the shape of the defects to be detected. One of the important constraint of the system is the processing time, which must be very short to work on a standard PC at the how rate of the industrial process.