First Steps Toward the Automatic Registration of Deformable Scans (original) (raw)

Three-dimensional registration is the process of aligning scans of different incomplete views of an object such that their corresponding regions agree in space and time. It is used to build digital complete models from partial acquisitions of real-world objects which typically contain noise, outliers, and acquisition holes due to occlusions and hardware limitations. For non-rigid models, such as humans, shapes of corresponding regions undergo complex deformations in addition to misalignments. Thus, finding explicit correspondences between two dissimilar shapes becomes considerably more challenging. In addition, finding the right deformations is also non-trivial as they depend on the correspondences which are only partially available between consecutive scans. This report presents an analysis of the 3-D registration problem, a general approach for the spatio-temporal registration of deformable scans that are acquired with a fast 3-D scanner, and extensive experiments on synthetic and real acquisition data. The objective is to un-deform the surfaces of all range maps and to fit them into a particular instance of time.