Interactive Assembly Guide Using Augmented Reality

This paper presents an Augmented Reality system for aiding a pump assembling process at Grundfos, one of the leading pump producers. Stable pose estimation of the pump is required in order to augment the graphics correctly. This is achieved by matching image edges with synthesized edges from CAD models. To ensure a system which operates at interactive-time the CAD models are pruned off-line and a two-step matching strategy is introduced. On-line the visual edges of the current synthesized model are extracted and compared with the image edges using chamfer matching together with a truncated L2 norm. A dynamic visualization of the augmented graphics provides the user with guidance. Usability tests show that the accuracy of the system is sufficient for assembling the pump.