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Moiré pattern

About: Moiré pattern is a research topic. Over the lifetime, 1917 publications have been published within this topic receiving 27176 citations. The topic is also known as: moiré fringes & moire pattern.


Papers
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Journal ArticleDOI
TL;DR: In this article, a simple temporal analysis algorithm (phase scanning method) is proposed for 3D surface profile measurement of a vibrating object based on shadow moire technique, where a grating is positioned close to a low-frequency vibration object and its shadow is observed through the grating.

32 citations

Journal ArticleDOI
TL;DR: A Fresnel zone plate of variable size can be formed as a moiré pattern between a suitable pair of identical grids to monitor the straightness of a continuous linear motion.
Abstract: A Fresnel zone plate of variable size can be formed as a moire pattern between a suitable pair of identical grids. The focusing power may be varied over a considerable range by relative translation of the grids if their line sbapejs are determined by a combination of cubic and linear functions. Elliptical and hyperbolic patterns are also obtainable. If both grids ae constructed in phase reversal form, the irradiance in the diffraction image due to the zone plate is enhanced substantially. The device may then be used with photoelectric detection to monitor the straightness of a continuous linear motion. A possible application to field widening in interference spectroscopy is also suggested.

32 citations

Journal ArticleDOI
TL;DR: This work reviews several automatic and semiautomatic image processing algorithms that enable the reduction of both speckle and full-field fringe patterns to quantitative data and presents examples of digital image processing based data reduction.
Abstract: Computerized analysis of optical fringe patterns has become an accepted method of reducing the time and tedium associated with extracting quantitative data from phase encoded intensity distributions. The computing power of today's personal computers makes digital image processing of moire, holographic, photoelastic, and speckle interferometric fringe patterns both economical and efficient. We review several automatic and semiautomatic image processing algorithms that enable the reduction of both speckle and full-field fringe patterns to quantitative data. The speckle patterns are analyzed using morphological properties, while the full-field fringe patterns are analyzed using standard thinning and fringe order seeding, sinusoidal fitting, Fourier transform, and phasestepping techniques. The mapping that each fringe pattern experiences when being digitized is also discussed so that proper system calibration can be developed. Analysis of geometric moire, moire interferometric, photoelastic, and speckle interferometric fringe patterns are presented as examples of digital image processing based data reduction.

32 citations

Journal ArticleDOI
Chao-Chao Ji1, Cheng-Gao Luo1, Huan Deng1, Da-Hai Li1, Qiong-Hua Wang1 
TL;DR: Experimental results show that not only the color moiré patterns are reduced remarkably, but also the resolution of the reconstructed 3D images are improved through the proposed method.
Abstract: In this paper, we propose a tilted elemental image array generation method for computer generated integral imaging display with reduced moire patterns. The pixels of the tilted elemental image array are divided into border pixels and effective pixels. According to the optimal tilted angle, the effective pixels are arranged with uniform arrangement. Also, a pixel mapping method is proposed. Appropriate experiments are carried out and the experimental results show that not only the color moire patterns are reduced remarkably, but also the resolution of the reconstructed 3D images are improved through the proposed method.

32 citations

Journal ArticleDOI
Chengmeng Li1, Yiping Cao1, Cheng Chen1, Yingying Wan1, Guangkai Fu1, Yapin Wang1 
TL;DR: A new 3D measuring method based on computer-generated moiré fringes that is of great potential in real-time or even dynamical 3D measurement due to its single-shot deformed pattern feature, and it avoids the influences of the object's reflectivity simultaneously.
Abstract: A new 3D measuring method based on computer-generated moire fringes is proposed. The two AC components of the 0-degree and 90-degree phase-shifted fringe patterns on reference plane are prepared in advance. While the AC component of the single-shot deformed pattern is multiplied by the two prepared AC components, respectively, two computer-generated moire fringes can be retrieved. The ratio of the two computer-generated moire fringes is just the tangent of the phase modulated by the object. It is of great potential in real-time or even dynamical 3D measurement due to its single-shot deformed pattern feature, and it avoids the influences of the object's reflectivity simultaneously. Compared to the Fourier transform profilometry, its error is smaller due to its higher first-order spectrum. Experimental results show the feasibility and validity of the proposed method.

32 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023181
2022321
202126
202048
201946
201844