Machine learning
A system using machine learning has been taught to look for, for instance a specific kind of defect, in the images of products passing in the line. This is done with the help of several reference images containing this specific type of defect, and where we have learned the system how to identify these defects. In this way the system, on its own, while being used in a production line manages to find such defects so an object containing the defect correctly can be rejected from the line.