光学学报, 2003, 23 (8): 910, 网络出版: 2006-06-27
基于相位跳变区划分的相位展开方法
Phase-Unwrapping Algorithm Based on Segmenting Regions Containing Phase Jumps
信号检测 相位跳变区 相位展开 移相干涉术 signal detection phase jump regions phase unwrapping phase-stepping interferometry
摘要
提出了一种相位跳变区域的确定方法,在此基础上提出一种基于相位跳变区划分的相位展开方法。计算机模拟和实验结果均证明:此方法对噪声有很强的抗干扰能力,能有效地实现带噪声的主值相位图的相位展开。
Abstract
Phase unwrapping is widely applied in a variety of fields including optical and microwave interferometry, adaptive optics, synthetic aperture radar and image processing. A phase unwrapping method based on segmenting regions containing phase jumps is proposed. The more the neighbors around a pixel have phase values near π and -π, and the smaller the number difference between the neighbors near π and -π is, the more possibly the pixel locates near a phase jump line. The pixels with high possibility form the phase jump regions, which can be eliminated by compensating the pixels with a multiply of 2π to minimize the phase difference between them and their neighbors. After removing phase jumps, ordinary filtering operations can be utilized to postprocess the noisy unwrapped phase map. Computer simulation and experimental results make it clear that the method can effectively remove noise in phase map and unwrap the wrapped phase.
彭震君, 钱锋, 钟向红, 路元刚, 王向朝. 基于相位跳变区划分的相位展开方法[J]. 光学学报, 2003, 23(8): 910. 彭震君, 钱锋, 钟向红, 路元刚, 王向朝. Phase-Unwrapping Algorithm Based on Segmenting Regions Containing Phase Jumps[J]. Acta Optica Sinica, 2003, 23(8): 910.