Single shot multiple phase retrieval in digital holographic interferometry using subspace processing

Ramaiah, Jagadesh; Gannavarpu, Rajshekhar

doi:10.1016/j.optlaseng.2018.08.012

Cited by 9 publications

(2 citation statements)

References 21 publications

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“…* denoting the complex conjugation operation. Here, equations ( 9) and ( 10) are derived by utilizing the rotational invariant structure of the image sensor array [30]. Subsequently, the parameter α can be calculated using the equation,…”

Section: Experiments Setup and Fringe Processingmentioning

confidence: 99%

“…Accordingly, space-frequency methods [22][23][24] have been proposed which offer localized processing of the interferogram for less noise susceptibility, albeit at higher computational cost. Similarly, methods based on state space modeling [25][26][27] and subspace processing [28][29][30] have also been developed, but their speed is limited by the requirement of multiple iterative computations or intensive matrix operations.…”

Section: Introductionmentioning

confidence: 99%

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Graphics processing unit assisted diffraction phase microscopy for fast non-destructive metrology

Ramaiah¹,

Ajithaprasad²,

Gannavarpu³

2019

Meas. Sci. Technol.

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For non-invasive deformation metrology using optical interferometry based techniques, reliable phase retrieval is an important problem. This paper proposes a graphics processing unit assisted fast and robust phase retrieval technique based on signal subspace method. The effectiveness and efficiency of the proposed method is shown using numerical simulations. For processing a fringe pattern of size 1024 by 1024 pixels, our proposed implementation provided improvement in computational efficiency by a factor of more than 150 as compared to the conventional sequential method. The practical viability of this approach is demonstrated for high speed deformation testing in an experimental configuration based on diffraction phase microscopy.

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Section: Experiments Setup and Fringe Processingmentioning

confidence: 99%