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中文摘要：
提出一种基于亚像素相移的噪音抑制算法，通过正弦务纹灰度的连续变化来实现亚像素相移，从而增加相移帧数．采用N—Bucket算法．解决了相移帧数增加后的计算量问题．模拟及实验表明，该方法可以有效地抑制噪音影响，提高测量准确度．
英文摘要：
An algorithm based on sub-pixel phase-shift technique is proposed, which is carried out by changing the intensity of digital grating continuously. The N-Bucket algorithm is also used to solve the computational load. The results of numerical simulation and experiments confirmed its ability of reducing the noise efficiently and improving the measurement precision.
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