关键词: 三维形状检索, 推土机距离, 层次匹配核, 部分相似性度量, 字袋模型

Abstract: The authors propose a new 3D shape representation, “local bag-of-words models”and use overlapped “local bag-of-words models”which improves the robustness of the algorithm by avoiding shape segmentation. The detailed steps are also proposed to apply the “Earth Mover’s distance”and “pyramid match kernels”algorithms to quantify partial shape similarity. It proves that the proposed distance measure mitigates the distance under-estimation problemof global bag-of-words model. Finally, the experiments firmly demonstratethe effectiveness of the proposed approach to 3Dpartial shape retrieval.

Key words: 3Dshaperetrieval, Earth Mover’s distance, pyramid match kernels, partial similarity measure, bag-of-words model