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	Globfit: Consistently fitting primitives by discovering global relations
	Li, Yangyan; Wu, Xiaokun; Chrysathou, Yiorgos; Sharf, Andrei; Cohen-Or, Daniel; Mitra, Niloy J.
	2011
会议名称	ACM SIGGRAPH 2011
会议地点	加拿大温哥华
英文摘要	Given a noisy and incomplete point set, we introduce a method that simultaneously recovers a set of locally fitted primitives along with their global mutual relations. We operate under the assumption that the data corresponds to a man-made engineering object consisting of basic primitives, possibly repeated and globallyaligned under common relations. We introduce an algorithm to directly couple the local and global aspects of the problem. The local fit of the model is determined byhow well the inferred model agrees to the observed data, while the global relations are iteratively learned and enforced through a constrained optimization. Starting with a set of initial RANSAC based locally fitted primitives, relations across the primitives such as orientation, placement, and equality are progressively learned and conformed to. In each stage, a set of feasible relations are extracted among the candidate relations, and then aligned to, while best fitting to the input data. Theglobal coupling corrects the primitives obtained in the local RANSAC stage, and brings them to precise global alignment. We test the robustness of our algorithm on a range of synthesized and scanned data, with varying amounts of noise, outliers, and non-uniform sampling, and validate the results against ground truth, where available. © 2011 ACM.(29 refs)
收录类别	EI
语种	英语
内容类型	会议论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/3593]
专题	深圳先进技术研究院_数字所
作者单位	2011
推荐引用方式 GB/T 7714	Li, Yangyan,Wu, Xiaokun,Chrysathou, Yiorgos,et al. Globfit: Consistently fitting primitives by discovering global relations[C]. 见:ACM SIGGRAPH 2011. 加拿大温哥华.

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