TY - GEN
T1 - Local Phase Correction Method Based on Multi-Frequency Phase Heterodyne
AU - Tang, Jianfeng
AU - Feng, Xuan
AU - Xu, Yuanping
AU - Cao, Yanlong
AU - Li, Tukun
AU - Qiao, Wenbo
AU - Xu, Zhijie
N1 - Publisher Copyright:
© 2021 Chinese Automation and Computing Society in the UK-CACSUK.
PY - 2021
Y1 - 2021
N2 - The multi-frequency phase heterodyne method is the most common method applied in the unwrap phase, but it failed to reduce the noise error in the image and the sinusoidal error from the projector. In order to address these issues, this study proposes a local phase correction method. This study starts to determine whether a phase map needs to be corrected by calculating the deviation between the predicted and actual phase according to the slope of the projected standard fringe pattern. Then the phase is corrected by different intensities at different sections. Finally, the method compensates the phase error of the detail part with the minimum error phase correction. Experimental results showed that the local phase correction method is the optimal phase correction method, which reduced the phase error by 86.5%. Finally, the phase map of the metal workpiece surface was calculated by the various methods. And the phase map with the highest quality was obtained by using the local phase correction method.
AB - The multi-frequency phase heterodyne method is the most common method applied in the unwrap phase, but it failed to reduce the noise error in the image and the sinusoidal error from the projector. In order to address these issues, this study proposes a local phase correction method. This study starts to determine whether a phase map needs to be corrected by calculating the deviation between the predicted and actual phase according to the slope of the projected standard fringe pattern. Then the phase is corrected by different intensities at different sections. Finally, the method compensates the phase error of the detail part with the minimum error phase correction. Experimental results showed that the local phase correction method is the optimal phase correction method, which reduced the phase error by 86.5%. Finally, the phase map of the metal workpiece surface was calculated by the various methods. And the phase map with the highest quality was obtained by using the local phase correction method.
KW - multi-frequency phase heterodyne
KW - phase correction
KW - phase unwrapping
KW - structured light suface measurement
UR - http://www.scopus.com/inward/record.url?scp=85123223561&partnerID=8YFLogxK
U2 - 10.23919/ICAC50006.2021.9594188
DO - 10.23919/ICAC50006.2021.9594188
M3 - Conference Proceeding
AN - SCOPUS:85123223561
T3 - 2021 26th International Conference on Automation and Computing: System Intelligence through Automation and Computing, ICAC 2021
BT - 2021 26th International Conference on Automation and Computing
A2 - Yang, Chenguang
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 26th International Conference on Automation and Computing, ICAC 2021
Y2 - 2 September 2021 through 4 September 2021
ER -