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论文类型：期刊论文

发表时间：2016-09-01

发表刊物：VISUAL COMPUTER

收录刊物：SCIE、EI、Scopus

卷号：32

期号：9

页面范围：1097-1108

ISSN号：0178-2789

关键字：3D shape retrieval; Normalized spectral descriptor; Non-rigid; Multi-level

摘要：This paper proposes a framework based on harmonic mean normalized Laplace-Beltrami spectral descriptor. A series of experiments show that the harmonic mean normalization has better performance for non-rigid 3D retrieval, and it is robust to holes, local scaling, noise and sampling. To better distinguish shapes with fine or rough details, weighting method and fusion method are also employed. Weighting method reduces the negative impact of high-frequency information, and fusion method combines multi-level spectral information in both low and high frequencies. Our approach has better performance than other state-of-the-art methods on both retrieval accuracy and time consumption for stretched non-rigid 3D shapes.