摘要
提出了一种欠采样条件下相位解包裹方法,对欠采样包裹相位在水平方向或者竖直方向进行一次剪切,然后对另一不同的方向进行二次剪切,对取得的相位采用最小二乘法进行提取,再进行迭代求和恢复得到真实的未包裹相位信息。通过理论分析与实验研究验证了该方法的有效性。结果表明,该方法不仅可以依据包裹相位的欠采样程度灵活选择剪切方向与剪切次数,以获得最佳解包裹效果,而且对于存在弱噪声的欠采样情况也可实现高精度的相位恢复。
A method for phase recovery from undersampled wrapped phase is presented. The original undersampled wrapped phase is sheared once along horizontal or vertical direction, and then along the other different direction again. The obtained phase is unwrapped by the least-square algorithm. The required and unwrapped phase is obtained after iterative summation. Both the simulating and experimental results prove the validity of the improved method. The results show that the proposed method can not only vary the shearing direction and shearing times flexibly according to the undersampled wrapped phase to achieve the best result, but also retrieve the phase with high accuracy from the undersampled wrapped phase with weak noise.
出处
《激光与光电子学进展》
CSCD
北大核心
2016年第5期142-150,共9页
Laser & Optoelectronics Progress
关键词
图像处理
欠采样
相位解包裹
剪切
最小二乘
image processing
undersampling
phase unwrapping
shearing
least square
