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

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.

References

[1] ZhangS. Optics and Lasers in Engineering, 2018, 106: 119

[2] LiB, AnY, CappelleriD, XuJ, ZhangS. International Journal of Intelligent Robotics and Applications, 2017, 1: 86

[3] ZappaE, BuscaG. Optics and Lasers in Engineering, 2012, 50: 1140

[4] ZuoC, FengS, HuangL, TaoT, YinW, ChenQ. Optics and Lasers in Engineering, 2018, 109: 23

[5] Wang Minmin, Research on Phase Extraction Algorithm for 3-D shape Measurement, Shandong University, 2018. (in Chinese)

[6] LiuF, LiJ, LaiJ, HeC. Laser & Optoelectronics Progress, 2019, 56: 011202

[7] WuS, YangY, ZhongZ, LuX. Acta Optica Sinica, 2014, 34: 131(in Chinese)

[8] ChenS, ZhaoJ, XiaR. Acta Optica Sinica, 2016, 36: 155(in Chinese)

[9] ChenL, DengW, LouX. Optical Technique, 2012, 38: 73 in Chinese)

[10] YuS, ZhangJ, YuX, SunX, WuH. Optics Communications, 2016, 374: 97

[11] SongQ, ChenY, ZhuR, ZhuR. Laser & Optoelectronics Progress, 2014, 51: 115(in Chinese)

[12] WangB, GuoL. Computer Measurement & Control, 2018, 26: 25(in Chinese)

[13] ZhangQ, WuZ. Infrared and Laser Engineering, 2020, 49: 78 in Chinese)

[14] FuY, HanY, ChenY, ZhangP, GuiJ, ZhongK, HuangC. Infrared and Laser Engineering, 2020, 49: 157(in Chinese)

[15] WangY, ZhangS. Optics Letters, 2012, 37: 2067

[16] ZhangS. Optics Letters, 2010, 35: 934

[17] ZhangQ, SuX, XiangL, SunX. Optics and Lasers in Engineering, 2012, 50: 574

[18] ZhengD, DaF, QianK, HockS S. Optics Express, 2017, 25: 4700