| Evaluation of absolute phase for 3D profile measurement using fringe projection |
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| 作者姓名： | 黄梦涛 蒋庄德 李兵 方素平 |
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| 作者单位： | State Key Lab for Manufacturing Systems Engineering Institute of Precision Engineering Xi'an Jiaotong University，State Key Lab for Manufacturing Systems Engineering Institute of Precision Engineering，Xi'an Jiaotong University，State Key Lab for Manufacturing Systems Engineering Institute of Precision Engineering，Xi'an Jiaotong University，State Key Lab for Manufacturing Systems Engineering Institute of Precision Engineering，Xi'an Jiaotong University，Xi'an 710049 Institute of Electrical and Control Engineering，Xi'an University of Science and Technology，Xi'an 710054，Xi'an 710049，Xi'an 710049，Xi'an 710049 |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China under Grant No. 50535030 and 50275120. |
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| 摘 要： | A new method of absolute phase evaluation for three-dimensional (3D) profile measurement using fringe projection is presented, which combines the gray code and the phase shift technique. Two kinds of fringe patterns are projected onto the object surface respectively, one is sinusoidal intensity distribution used for phase demodulation and the other is gray code fringe pattern for unwrapping. These images are acquired by camera and stored into computer. The absolute phase is obtained by analyzing these images. The validity of this method is verified experimentally. The method is superior to other phase unwrapping methods.
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