一种改进的相位解缠算法

针对复杂包裹相位图解缠相位时存在相位跳变和解缠耗时的问题, 提出一种改进的相位解缠算法. 首先通过四步相移法得到包裹相位图, 由包裹相位图生成质量图; 其次将质量图划分为高质量区和低质量区, 高质量区使用简单路径算法解缠, 低质量区通过相邻两像素点的质量值构造水平和竖直权值边； 最后按构造边权值从小到大进行相位解缠, 解缠过程以两像素点所构成的边为单位, 采用不连续解缠路径, 逐次解缠所有像素点. 实验结果表明, 该算法与其他算法相比, 解缠速度较快且效果好.

An Improved Phase Unwrapping Algorithm

An improved phase unwrapping algorithm was proposed to sovle the problem of phase jumping and time consuming in phase unwrapping of complex wrapping phase image. Firstly, the wrapped phase image was obtained by four step phase shift method, and the quality map was generated from the wrapped phase image. Secondly, the quality map was divided into high quality area and low quality area, the high quality area was unwrapped by simple path algorithm, and the low quality area was constructed the horizontal and vertical weighted edges by the quality values of two adjacent pixels. Finally, phase unwrapping was performed according to the constructed edge weights from small to large. The unwrapping process took the edges of two pixel points as unit. Discontinuous unwrapping paths were used to unwrap all the pixels one by one. The experimental results show that compared with other algorithms, the proposed algorithm has faster unwrapping speed and better effect of unwrapping.