:三次元モデル,考古遺物,文化遺産,マルチメディア情報検索 3 D Artifact Model Retrieval by Volumetric Spiral Scan Order

With the increasing performance of 3D acquisition devices, 3D digitization of archaeological artifacts has been promoted in various archaeology institutes and museums. The development of similarity search system for 3D artifact models assists archaeologists to discover a new relationship between artifacts. In this paper, for retrieving 3D artifact models, we propose a new feature extraction method for textured 3D models, called Volumetric Spiral Scan Order (VSSO), which captures local color distribution and color difference of the 3D artifact models by calculating distances between adjacent color voxels while spirally scanning voxel representation. To confirm the effectiveness of the VSSO method, we made the benchmark dataset by taking a proper subset of 3D artifact models provided by the Virtual Hampson Museum, and performed comparative experiments with previous methods. The experimental results demonstrated that the VSSO method outperforms previous methods including Spherical Harmonics Descriptor and color-CHLAC feature.