A High-Precision Registration Method Based on Auxiliary Sphere Targets

High-precision data registration is a key to ensure the high-precision three-dimensional profile measurement. In order to register the featureless surface or the surface with non-overlapping data, this paper proposes a new registration method based on auxiliary sphere targets. Combined with ICP algorithm the new method adopts the sphere targets for fitting continuous spheres and providing spherical constraint. The continuous spheres provide the registration features and more accurate corresponding point pairs for high-precision registration. The spherical constraint restricts the non-overlapping measurement point clouds to be aligned to the sphere targets. Simulation and experiments verify the effectiveness of the proposed method.