Improved differential 3D shape retrieval

被引：10
|
作者：
Liu, Tongchuan [1 ]
Zhou, Canlin [1 ]
Si, Shuchun [1 ]
Li, Hui [1 ]
Lei, Zhenkun [2 ]
机构：
[1] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China
[2] Dalian Univ Technol, Dept Engn Mech, Dalian 116024, Peoples R China
来源：
OPTICS AND LASERS IN ENGINEERING | 2015年 / 73卷
基金：
中国国家自然科学基金;
关键词：
Surface measurement; Phase unwrapping; Coordinate transformation; Fourier differentiation theorem; PHASE; PROJECTION;
D O I：
10.1016/j.optlaseng.2015.03.015
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Phase unwrapping is a complex step in three-dimensional (3D) surface measurement. To simplify the computation process, Martino et al. proposed a differential algorithm. However, it will result in large error when the orthogonal fringes are not in horizontal or vertical direction. To solve this problem, the relationship between projector's and camera's coordinate systems is introduced. With the data obtained from coordinate transformation, the improved differential algorithm can be used for orthogonal fringes in any direction. Besides that, taking advantage of Fourier differentiation theorem makes operation and calculation simpler. By contrast, the results of experiments show that the proposed method is applicable to the patterns with orthogonal fringes in every direction. In addition, Fourier differentiation theorem effectively increases the speed of differential process. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：143 / 149
页数：7
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