Computer Vision for Fault Detection in Aluminum Castings

Abstract

Castings produced for the automotive industry are considered the important components for overall roadworthiness. To ensure the safety of construction, it is necessary to check every part thoroughly using nondestructive testing. X-ray testing rapidly became the accepted way for controlling the quality of die cast pieces. In this article, the fundamental principles of the automated detection of casting discontinuities are explained. A general computer vision inspection schema is presented, and several methods that have appeared in the literature in the past 30 years were explained showing the development of this sector in the areas of industry and academia.