GU Qian-qian,Lü Shan-shan,JIANG Ming-shun,ZHANG Lei,ZHANG Fa-ye,SUI Qing-mei,JIA Lei.Phase error correction method based on the Gaussian filtering algorithm and intensity variance[J].Optoelectronics Letters,2021,17(4):221-225 Phase error correction method based on the Gaussian filtering algorithm and intensity variance Author Name Affiliation GU Qian-qian  School of Control Science and Engineering, Shandong University, Jinan 250061, China  Lü Shan-shan  School of Control Science and Engineering, Shandong University, Jinan 250061, China  JIANG Ming-shun  School of Control Science and Engineering, Shandong University, Jinan 250061, China  ZHANG Lei  School of Control Science and Engineering, Shandong University, Jinan 250061, China  ZHANG Fa-ye  School of Control Science and Engineering, Shandong University, Jinan 250061, China  SUI Qing-mei  School of Control Science and Engineering, Shandong University, Jinan 250061, China  JIA Lei  School of Control Science and Engineering, Shandong University, Jinan 250061, China  Abstract:       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 filtering 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 accuracy 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. Hits: 694 Download times: 0 View Full Text    Download reader