# Three-Dimensional Shape Measuring Method Based on Dual-Frequency Digital Moiré Fringe
> Hu H.

URL kanonis: https://discover.unhas.ac.id/publications/pub_scopus_85158849780
Jurnal / Konferensi: Laser and Optoelectronics Progress
Tahun terbit: 2023
DOI: https://doi.org/10.3788/LOP222658
ISSN: 10064125
Kuartil SJR: Q3
Citations: 1

## Authors
- Hu H.

## Abstract
A dual-frequency digital Moiré measurement method (DFDM) is proposed for the three-dimensional (3D) shape measurement of an object. The high- and low-frequency fringes are modulated separately along orthogonal direction using different carrier frequencies before being projected onto the measured object. After collecting and demodulating the composite fringe, the digital π phase shift is used to remove the DC component of the demodulated fringes, resulting in high-precision Moiré fringes for calculating the wrapped phase. The unwrapping of the high-frequency wrapped phase is guided by the low-frequency phase to further realistically reconstruct the surface of the measured object. When compared with existing single-shot digital Moiré profilometry, DFDM effectively removes the DC component of the fringe and calculates the phase more accurately.A dual-frequency digital Moiré measurement method (DFDM) is proposed for the three-dimensional (3D) shape measurement of an object. The high- and low-frequency fringes are modulated separately along orthogonal direction using different carrier frequencies before being projected onto the measured object. After collecting and demodulating the composite fringe, the digital π phase shift is used to remove the DC component of the demodulated fringes, resulting in high-precision Moiré fringes for calculating the wrapped phase. The unwrapping of the high-frequency wrapped phase is guided by the low-frequency phase to further realistically reconstruct the surface of the measured object. When compared with existing single-shot digital Moiré profilometry, DFDM effectively removes the DC component of the fringe and calculates the phase more accurately.

## Keywords
- Moiré pattern
- Dual (grammatical number)
- Optics
- Computer science
- Computer vision
- Materials science
- Artificial intelligence
- Physics
- Art
- Literature

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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