T.: Learning part-based templates from large collections of 3D shapes

As large repositories of 3D shape collections continue to grow, un-derstanding the data, especially encoding the inter-model similarity and their variations, is of central importance. For example, many data-driven approaches now rely on access to semantic segmen-tation information, accurate inter-model point-to-point correspon-dence, and deformation models that characterize the model collec-tions. Existing approaches, however, are either supervised requiring manual labeling; or employ super-linear matching algorithms and thus are unsuited for analyzing large collections spanning many thousands of models. We propose an automatic algorithm that starts with an initial template model and then jointly optimizes for part segmentation, point-to-point surface correspondence, and a com-pact deformation model to best explain the input model collection. As output, the algorithm produces a set of probabilistic part-based templates that groups the original models into clusters of models capturing their styles and variations. We evaluate our algorithm on several standard datasets and demonstrate its scalability by analyz-ing much larger collections of up to thousands of shapes