期刊
OPTICS AND LASERS IN ENGINEERING
卷 49, 期 4, 页码 547-552出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlaseng.2010.12.004
关键词
Projected fringe; Image processing; Fringe pattern; Optical shape measurement
类别
资金
- National Natural Science Foundation of PR China [60775025]
- Program for New Century Excellent Talents in University
- Natural Science Foundation of JiangSu Province [BK2010058]
- Open Research Foundation of State Key Laboratory of Digital Manufacturing Equipment and Technology in Huazhong University of Science and Technology [DMETKF2009011]
Aimed to obtain high-quality sinusoidal fringe projection, a new method to correct the output fringe of digital projector is presented. The method is based on the proposed fringe transform model, which describes the relationship of the input and output fringe pattern. Firstly, a series of fringe patterns are projected and from the fringe images, the transform function is calculated by the pattern shifting method. At last, by modifying the input fringe pattern, a standard sinusoidal output fringe can be achieved. Different from the previous methods, the waveform nonlinearity is estimated by varying the intensity of the projected fringe pixel by pixel; thus the waveform nonlinearity can be estimated precisely and the time cost is considerably reduced. Experimental results show that by modification of the input projection patterns the projector can project fringe with high-quality sinusoidal waveform leading to high performance of the projection system. (C) 2010 Elsevier Ltd. All rights reserved.
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