Phase-shifting interferometry with genetic algorithm-based twin image noise elimination

Hahn, Joonku; Kim, Hwi; Cho, Seong-Woo; Lee, Byoungho

doi:10.1364/ao.47.004068

Cited by 21 publications

(10 citation statements)

References 19 publications

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“…In digital holography, methods based on various phase-shifting techniques that compute complex holograms have been reported recently [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. These complex holograms record wavefront information of the optical field propagated from an object under measurement.…”

Section: Introductionmentioning

confidence: 99%

Fully interferometric three-dimensional imaging spectrometry using hyperbolic-type volume interferogram

2013

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A signal-processing method is proposed in the fully interferometric three-dimensional (3D) imaging spectrometry. This processing computes a 3D interferogram, in which recorded fringe patterns do not directly reflect wavefront forms propagated from a polychromatic light source under measurement. This paper presents a procedure for signal processing including a synthesis of the 3D interferogram and retrieval of a set of spectral components of 3D images. We demonstrate retrieving 3D images for spectral components of two planar light sources by means of the proposed method. The procedure to synthesize the 3D interferogram in this method suggests the possibility of direct measurement of the 3D interferogram.

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Section: Introductionmentioning

confidence: 99%

Fully interferometric three-dimensional imaging spectrometry using hyperbolic-type volume interferogram

2013

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“…The deviation of the estimated intensity value from the correct value of the reference light results from the zero-order and the twin-image terms in the target hologram. Thus, based on the concept of hologram subtraction [17], we propose a new target hologram [Eq. (6)] in which the zero-order term is removed to reduce the estimation error.…”

Section: Resultsmentioning

confidence: 99%

Comparison of two-, three-, and four-exposure quadrature phase-shifting holography

et al. 2011

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In standard (four-exposure) quadrature phase-shifting holography (QPSH), two holograms and two intensity maps are acquired for zero-order-free and twin-image-free reconstruction. The measurement of the intensity map of the object light can be omitted in three-exposure QPSH. Furthermore, the measurements of the two intensity maps can be omitted in two-exposure QPSH, and the acquisition time of the overall holographic recording process is reduced. In this paper we examine the quality of the reconstructed images in two-, three-, and four-exposure QPSH, in simulations as well as in optical experiments. Various intensity ratios of the object light and the reference light are taken into account. Simulations show that two-and three-exposure QPSH can provide reconstructed images with quality comparable to that of four-exposure QPSH at a low intensity ratio. In practice the intensity ratio is limited by visibility, and thus four-exposure QPSH exhibits the best quality of the reconstructed image. The uniformity and the phase error of the reference light are also discussed. We found in most cases there is no significant difference between the reconstructed images in two-and three-exposure QPSH, and the quality of the reconstructed images is acceptable for visual applications such as the acquisition of three-dimensional scene for display or particle tracking.

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“…For a projector with finite resolution of 1024 768 × pixels, the maximum spatial frequency of expressible sinusoidal fringe pattern is 10 2 − . Thus, the available spatial frequencies for the projector with 1024 768 × resolution are in the range of 10…”

Section: Depth Extraction Using Multi-frequency and Four-step Phase-smentioning

confidence: 99%

“…In the use of the phase-shifting technique, at least three steps of phase-shifting are necessary, which gives two relative phase bases. However, four steps of phase-shifting are usually preferred due to accuracy and reliability [9][10][11]. Thus, in this paper, we use four-step phase shifting method for synthesizing multifrequency composite fringe patterns and performing the depth extraction.…”

Section: Introductionmentioning

confidence: 99%

Profilometry without phase unwrapping using multi-frequency and four-step phase-shift sinusoidal fringe projection

Kim¹,

Hahn²,

Kim³

et al. 2009

Opt. Express

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A three-dimensional (3D) profilometry method without phase unwrapping is proposed. The key factors of the proposed profilometry are the use of composite projection of multi-frequency and four-step phase-shift sinusoidal fringes and its geometric analysis, which enable the proposed method to extract the depth information of even largely separated discontinuous objects as well as lumped continuous objects. In particular, the geometric analysis of the multi-frequency sinusoidal fringe projection identifies the shape and position of target objects in absolute coordinate system. In the paper, the depth extraction resolution of the proposed method is analyzed and experimental results are presented.

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Phase-shifting interferometry with genetic algorithm-based twin image noise elimination

Cited by 21 publications

References 19 publications

Fully interferometric three-dimensional imaging spectrometry using hyperbolic-type volume interferogram

Fully interferometric three-dimensional imaging spectrometry using hyperbolic-type volume interferogram

Comparison of two-, three-, and four-exposure quadrature phase-shifting holography

Profilometry without phase unwrapping using multi-frequency and four-step phase-shift sinusoidal fringe projection

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