Phase error correction method based on the Gaussian filtering algorithm and intensity variance

• 作者: GU Qian-qian Lü Shan-shan JIANG Ming-shun ZHANG Lei ZHANG Fa-ye SUI Qing-mei JIA Lei
• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Measurement Devices and Methods
• 页码范围: 221-225
• 页数: 5页
• 语种: 英文
• DOI: 10.1007/s11801-021-0009-6

摘要

To overcome the invalid phase and phase jump phenomenon generated during the phase unwrapping,a phase error correction method based on the Gaussian filtering algorithm and intensity variance is proposed in this paper.First,a threshold of fringe intensity variance is set to identify and clear the phase in the invalid region.Then,the Gaussian fil-tering algorithm is employed to correct the phase order at the fringe junction,and then the absolute phase is corrected.Finally,the phase correction experiments of different geometric objects are carried out to verify the feasibility and ac-curacy of the proposed method.The method proposed in this paper can be extended to the correction of absolute phase error obtained by any coding method.