Research Article
Comparison of Two Fourier Transform Methods in Modulation Measurement Profilometry
@INPROCEEDINGS{10.1007/978-3-030-77569-8_14, author={Min Zhong and Feng Chen and Chao Xiao and Peng Duan and Min Li and Wenzao Li}, title={Comparison of Two Fourier Transform Methods in Modulation Measurement Profilometry}, proceedings={Quality, Reliability, Security and Robustness in Heterogeneous Systems. 16th EAI International Conference, QShine 2020, Virtual Event, November 29--30, 2020, Proceedings}, proceedings_a={QSHINE}, year={2021}, month={6}, keywords={Surface measurements Fourier transform Image analysis Modulation}, doi={10.1007/978-3-030-77569-8_14} }- Min Zhong
Feng Chen
Chao Xiao
Peng Duan
Min Li
Wenzao Li
Year: 2021
Comparison of Two Fourier Transform Methods in Modulation Measurement Profilometry
QSHINE
Springer
DOI: 10.1007/978-3-030-77569-8_14
Abstract
The modulation measurement profilometry encoding the spatial distribution information of specimen surface into the fringe defocus can realize the reconstruction of the specimen with complex surface shape. For this technique, the imaging axis of the CCD camera is coaxial with the projecting direction thanks to the application of a beam splitter mounting in the projection optical path. Without doing the phase unwrapping operation, it can accomplish shadow-free measurement for the specimen by extracting modulation values of the fringe pattern. The paper makes a comparison of the modulation retrieval in the conditions of fringe patterns with different surface profiles. Two Fourier transform methods are implemented in our computer simulation and practical experiment to show their performance in demodulating the modulation information from fringe patterns in optical 3D shape measurement.
