The Industry 4.0 or Fourth Industrial Revolution is causing a change of conventional manufacturing and mechanical practices, by adding smart IT innovation. This fundamentally centers around the utilization of large scale machine to machine communication (M2M) and Internet of Things (IoT) arrangements to give expanded automation, improved communication and self-observing. Particularly, in this context, smart machines are developed, which  can investigate and analyze issues without the requirement for human mediation. Casting products are important components and have a crucial role in large equipment. Casting is a manufacturing process in which defects may form while pouring the metal. Surface defects (e.g., blow holes, shrinkage, and metallurgical defects) are common in casting and they can be detected by visual inspection.