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Báo cáo hóa học: " Research Article 3D Model Search and Retrieval Using the Spherical Trace Transform"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article 3D Model Search and Retrieval Using the Spherical Trace Transform | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID 23912 14 pages doi 10.1155 2007 23912 Research Article 3D Model Search and Retrieval Using the Spherical Trace Transform Dimitrios Zarpalas 1 2 Petros Daras 1 2 Apostolos Axenopoulos 1 2 Dimitrios Tzovaras 1 2 and Michael G. Strintzis1 2 1 Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki 54006 Greece 2Informatics and Telematics Institute 1st km Thermi-Panorama Road P.O.Box 361 Thermi-Thessaloniki 57001 Greece Received 31 January 2006 Accepted 22 June 2006 Recommended by Ming Ouhyoung This paper presents a novel methodology for content-based search and retrieval of 3D objects. After proper positioning of the 3D objects using translation and scaling a set of functionals is applied to the 3D model producing a new domain of concentric spheres. In this new domain a new set of functionals is applied resulting in a descriptor vector which is completely rotation invariant and thus suitable for 3D model matching. Further weights are assigned to each descriptor so as to significantly improve the retrieval results. Experiments on two different databases of 3D objects are performed so as to evaluate the proposed method in comparison with those most commonly cited in the literature. The experimental results show that the proposed method is superior in terms of precision versus recall and can be used for 3D model search and retrieval in a highly efficient manner. Copyright 2007 Dimitrios Zarpalas et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION With the general availability of 3D digitizers scanners and the technology innovation in 3D graphics and computational equipment large collections of 3D graphical models can