Recent advances in automatic demodulation of single fringe patterns

Quiroga, Juan Antonio; Crespo, Daniel; Pedrero, J. A. Gomez; Antón, Juan Carlos Martínez

doi:10.1007/3-540-29303-5_10

Cited by 1 publication

(2 citation statements)

References 7 publications

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“…where Sf u; v; ξ; η is the windowed Fourier spectrum; the symbol denotes the conjugate of a complex number; g u;v;ξ;η x; y is the windowed Fourier element defined as g u;v;ξ;η x; y gx − u; y − v expjξx jηy; (9) x; y and u; v are used as spatial coordinates, while ξ; η is used as frequency coordinate. The spatial extension of the windowed Fourier transform is limited by the window function gx − u; y − v, where Gaussian window is used in this paper [22].…”

Section: Windowed Fourier Ridges Based Orientation Unwrappingmentioning

confidence: 99%

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Quality-guided orientation unwrapping for fringe direction estimation

Wang

Kemao

2012

Appl. Opt.

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Fringe patterns produced by various optical interferometric techniques encode information such as shape, deformation, and refractive index. Denoising and demodulation are two important procedures to retrieve information from a single closed fringe pattern. Various existing denoising and demodulation techniques require fringe direction/orientation during the processing. Fringe orientation is often easier to obtain but fringe direction is needed in some demodulation techniques. A quality-guided orientation unwrapping scheme is proposed to estimate direction from orientation. Two techniques, one based on windowed Fourier ridges and the other based on fringe gradient, are proposed for the quality-guided orientation unwrapping scheme. The direction qualities are compared for both simulated and experimental fringe patterns. Their application to demodulation technique is also given.

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Section: Windowed Fourier Ridges Based Orientation Unwrappingmentioning

confidence: 99%

“…Fringe pattern denoising and demodulation are thus two important aspects of processing a single fringe pattern. Fringe direction/orientation is an essential part of many existing denoising [2][3][4][5] and demodulation techniques [6][7][8][9][10]. Reliable direction/orientation estimation technique is of interest.…”

Section: Introductionmentioning

confidence: 99%

Quality-guided orientation unwrapping for fringe direction estimation

Wang

Kemao

2012

Appl. Opt.

View full text Add to dashboard Cite

show abstract

Recent advances in automatic demodulation of single fringe patterns

Cited by 1 publication

References 7 publications

Quality-guided orientation unwrapping for fringe direction estimation

Quality-guided orientation unwrapping for fringe direction estimation

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