Journal ArticleDOI
Phase unwrapping in digital holography based on non-subsampled contourlet transform
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TLDR
A robust unwrapping algorithm based on the non-subsampled contourlet transform (NSCT) is developed and its universality and superiority in the digital holographic interferometry have been demonstrated by both numerical analysis and practical experiments.About:
This article is published in Optics Communications.The article was published on 2018-01-15. It has received 15 citations till now. The article focuses on the topics: Contourlet & Digital holography.read more
Citations
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Journal ArticleDOI
Simultaneous dual-wavelength phase-shifting interferometry for surface topography measurement
TL;DR: In this article, a simultaneous dual-wavelength phase-shifting interferometry (SDWPSI) was proposed to deal with vibration disturbance in interferometric measurement of surface topography.
Journal ArticleDOI
An accurate phase shift extraction algorithm for phase shifting interferometry
TL;DR: In this paper, a general algorithm based on Lissajous figures and ellipse fitting is proposed for extracting the phase distribution from a set of phase-shifting interferograms with random noise.
Journal ArticleDOI
Correction of phase-shifting error in wavelength scanning digital holographic microscopy
TL;DR: In this article, an accurate reconstruction approach is proposed to correct the phase-shifting errors by minimizing the difference between the ideal interferograms and the recorded ones, and the restriction on the step number and uniformity of the phase shifting is relaxed in the interferometry.
Journal ArticleDOI
Accurate reconstruction for the measurement of tilt surfaces with digital holography
TL;DR: Experimental results demonstrate that the proposed method can effectively improve the reconstruction accuracy of the tilt wavefronts and can be refined with the particle swarm optimization.
Journal ArticleDOI
Infrared and visible image fusion based on QNSCT and Guided Filter
TL;DR: In this paper , a new fusion framework based on Quaternion Non-Subsampled Contourlet Transform (QNSCT) and Guided Filter detail enhancement is designed to address the problems of inconspicuous infrared targets and poor background texture in Infrared and visible image fusion.
References
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Journal ArticleDOI
Satellite radar interferometry: Two-dimensional phase unwrapping
TL;DR: In this paper, an approach to 'unwrapping' the 2 pi ambiguities in the two-dimensional data set is presented, where it is found that noise and geometrical radar layover corrupt measurements locally, and these local errors can propagate to form global phase errors that affect the entire image.
Journal ArticleDOI
The Nonsubsampled Contourlet Transform: Theory, Design, and Applications
TL;DR: This paper proposes a design framework based on the mapping approach, that allows for a fast implementation based on a lifting or ladder structure, and only uses one-dimensional filtering in some cases.
Book ChapterDOI
Translation-Invariant De-Noising
TL;DR: A reconstruction subject to far weaker Gibbs phenomena than thresholding based De-Noising using the traditional orthogonal wavelet transform is produced.
Journal ArticleDOI
Fast two-dimensional phase-unwrapping algorithm based on sorting by reliability following a noncontinuous path.
TL;DR: This work describes what is to the authors' knowledge a novel technique for phase unwrapping that uses a different type of reliability function and does not follow a continuous path to perform the unwrapped operation.
Journal ArticleDOI
Digital holographic microscopy for live cell applications and technical inspection
Björn Kemper,Gert von Bally +1 more
TL;DR: Digital holographic microscopy enables a quantitative phase contrast metrology that is suitable for the investigation of reflective surfaces as well as for the marker-free analysis of living cells.