Phase unwrapping method based on multiple fringe patterns without use of equivalent wavelengths

Song, Limei; Chang, Yulan; Xi, Jiangtao; Guo, Qinghua; Zhu, Xinjun; Li, Xiaojie

doi:10.1016/j.optcom.2015.06.061

Cited by 24 publications

(7 citation statements)

References 20 publications

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“…We compared our method with the multi-frequency heterodyne method [ 35 ] in the experiments. Three-dimensional measurements of grey anime dolls, colored puppets, colorful kittens, air valves, and flat were carried out and the experiment results are shown in Figure 5 .…”

Section: Methodsmentioning

confidence: 99%

Structured-Light Based 3D Reconstruction System for Cultural Relic Packaging

Song

Yang

et al. 2018

Sensors

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The non-contact three-dimensional measurement and reconstruction techniques have played a significant role in the packaging and transportation of precious cultural relics. This paper develops a structured light based three-dimensional measurement system, with a low-cost for cultural relics packaging. The structured light based system performs rapid measurements and generates 3D point cloud data, which is then denoised, registered and merged to achieve accurate 3D reconstruction for cultural relics. The multi-frequency heterodyne method and the method in this paper are compared. It is shown that the relative accuracy of the proposed low-cost system can reach a level of 1/1000. The high efficiency of the system is demonstrated through experimental results.

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Section: Methodsmentioning

confidence: 99%

Structured-Light Based 3D Reconstruction System for Cultural Relic Packaging

Song

Yang

et al. 2018

Sensors

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“…Fringe projection profilometry (FPP) [1] is commonly used for full-field non-contact surface-shape measurement for a wide range of applications. Phase-shifting profilometry (PSP) [2] has been commonly used because of its high accuracy, high spatial resolution, and low sensitivity to variations of background intensity and surface reflectivity [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, fewer projected and captured patterns are possible (e.g., six patterns for temporal phase unwrapping with 3-step phase-shifting) [4]. Three and multiple-wavelength temporal phase unwrapping can further extend the beat wavelength to increase the measurable height with less noise [3,[12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Multi-Wavelength Digital-Phase-Shifting Moiré Based on Moiré Wavelength

Mohammadi

Kofman

2019

Applied Sciences

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Multi-wavelength digital-phase-shifting moiré was demonstrated using multiple moiré wavelengths determined by system calibration over the full working depth. The method uses the extended noisy phase map as a reference to unwrap the phase map with a shorter wavelength, and thus achieve a less noisy and more accurate continuous phase map. The moiré wavelength calibration determines a moiré-wavelength to height relationship that permits pixelwise refinement of the moiré wavelength and height during 3D reconstruction. Only a single pattern has to be projected and, thus, a single image captured to compute each phase map with a different wavelength to perform digital-phase-shifting moiré temporal phase unwrapping. Only two captured images are required for two-wavelength phase unwrapping and three captured images for three-wavelength phase unwrapping. The method has been demonstrated in the 3D surface-shape measurement of an object with surface discontinuities and spatially isolated objects.

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“…These limitations prevent the applicability of all aforementioned methods for samples that present sharply changing topography or position changes of µm scale, especially when high acquisition rate is required, which is often the case. Multiple wavelength illumination phase unwrapping is the simplest solution to this limitation, while maintaining the speed of acquisition, and has already been implemented in holography [18] and, later, in PSI [19], quantitative phase imaging [20,21], DHM [22], off-axis interferometry [23], and fringe pattern profilometry [24]. However, this solution further complicates the system design.…”

Section: Introductionmentioning

confidence: 99%

Compact and fast sub-nm scale displacement probe using a phase mask and parallel phase-shift interferometry

Nazarov

Ney

Abdulhalim

2018

J. Phys. D: Appl. Phys.

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A fast and compact system design concept for parallel phase shift interferometry systems is presented and demonstrated for several applications such as high performance vibrometry, dynamic focus tracking and surface profiling with sub-nm accuracy. The unique system design allows the easy generation and simultaneous acquisition of three phase shifted interference signals utilized for axial position tracking, using a segmented waveplate mask aligned over a single off-the-shelf quadrant detector. This design is superior to common designs in simplicity and compactness, is cost effective, power efficient, inherently easier to calibrate and is thus more robust allowing superior system performance.

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Phase unwrapping method based on multiple fringe patterns without use of equivalent wavelengths

Cited by 24 publications

References 20 publications

Structured-Light Based 3D Reconstruction System for Cultural Relic Packaging

Structured-Light Based 3D Reconstruction System for Cultural Relic Packaging

Multi-Wavelength Digital-Phase-Shifting Moiré Based on Moiré Wavelength

Compact and fast sub-nm scale displacement probe using a phase mask and parallel phase-shift interferometry

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