Phase-height mapping and coordinate calibration simultaneously in phase-measuring profilometry

Su, Xin; Song, Wanzhong; Cao, Yiping; Xiang, Liqun

doi:10.1117/1.1646178

Cited by 28 publications

(1 citation statement)

References 17 publications

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“…It has been more and more widely employed in industrial applications such as quality inspection, reverse engineering, interactive design, and so on [2,3]. In PSFPP, the height is derived from the phase of the captured sinusoidal fringe pattern regardless of the employed 3D reconstruction strategies [4][5][6][7][8][9]. Hence, the phase accuracy directly determines the 3D measurement accuracy.…”

Section: Introductionmentioning

confidence: 99%

Phase accuracy evaluation for phase-shifting fringe projection profilometry based on uniform-phase coded image

Zhang¹,

Zhao²,

Zhu³

et al. 2018

Meas. Sci. Technol.

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Phase-shifting fringe projection profilometry (PSFPP) is a three-dimensional (3D) measurement technique widely adopted in industry measurement. It recovers the 3D profile of measured objects with the aid of the fringe phase. The phase accuracy is among the dominant factors that determine the 3D measurement accuracy. Evaluation of the phase accuracy helps refine adjustable measurement parameters, contributes to evaluating the 3D measurement accuracy, and facilitates improvement of the measurement accuracy. Although PSFPP has been deeply researched, an effective, easy-to-use phase accuracy evaluation method remains to be explored. In this paper, methods based on the uniform-phase coded image (UCI) are presented to accomplish phase accuracy evaluation for PSFPP. These methods work on the principle that the phase value of a UCI can be manually set to be any value, and once the phase value of a UCI pixel is the same as that of a pixel of a corresponding sinusoidal fringe pattern, their phase accuracy values are approximate. The proposed methods provide feasible approaches to evaluating the phase accuracy for PSFPP. Furthermore, they can be used to experimentally research the property of the random and gamma phase errors in PSFPP without the aid of a mathematical model to express random phase error or a large-step phase-shifting algorithm. In this paper, some novel and interesting phenomena are experimentally uncovered with the aid of the proposed methods.

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Section: Introductionmentioning

confidence: 99%

Phase accuracy evaluation for phase-shifting fringe projection profilometry based on uniform-phase coded image

Zhang¹,

Zhao²,

Zhu³

et al. 2018

Meas. Sci. Technol.

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An accurate phase-height mapping algorithm by using a virtual reference plane

Liu

2020

Optik

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Out-of-plane deformation measurements of an aluminium plate during quasi-static perforation using structured light and close-range photogrammetry

Grytten

Fagerholt

Auestad

et al. 2007

International Journal of Solids and Structures

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An optical system using structured light and close-range photogrammetry for full-field continuous measurements of the out-of-plane deformation of a metal plate loaded at its centre by a moving punch is presented. The system is applicable both for quasi-static and dynamic loading conditions, but in this paper focus will be on the former. In the tests, a square AA5083-H116 aluminium plate is mounted in a circular frame and penetrated from above by a cylindrical punch, while the out-of-plane deformation is observed from below. A fringe pattern is projected on the target plate surface and recorded by a camera (or more than one if required). The changing fringe positions on the plate surface during perforation are then computer processed to give topography information of the out-of-plane deformation. This paper is divided into three major parts. First, the optical technique is presented with a description of the applied method, image analysis procedures, calibration of the system and estimation of accuracy of the acquired data points. The experimental set-up is then presented, and some results from a typical test where a 5 mm thick plate with free-span diameter of 500 mm is perforated by a 20 mm diameter blunt-nose punch are given. Finally, numerical simulations of the perforation process are carried out using the non-linear finite element code LS-DYNA. The numerical predictions are compared with the experimental observations and the applicability of the experimental method is discussed based on the obtained results.

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Phase-height mapping and coordinate calibration simultaneously in phase-measuring profilometry

Cited by 28 publications

References 17 publications

Phase accuracy evaluation for phase-shifting fringe projection profilometry based on uniform-phase coded image

Phase accuracy evaluation for phase-shifting fringe projection profilometry based on uniform-phase coded image

An accurate phase-height mapping algorithm by using a virtual reference plane

Out-of-plane deformation measurements of an aluminium plate during quasi-static perforation using structured light and close-range photogrammetry

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