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Effect of scintillation noise in heterodyne speckle photogrammetry
Applied Optics, 1984Heterodyne interferometry provides an accurate method of measuring specklegram halo fringes for strain analysis; however, when fringe contrast is less than unity, the uncorrelated portions of the fields generate a background scintillation that is a random function of specklegram and detector positions. In practice, this scintillation effect establishes
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Exploiting the speckle noise for compressive imaging
Optics Communications, 2011Abstract An optical setup is proposed for the implementation of compressive sensing with coherent images. This setup specifically exploits the natural multiplicative action of speckle noise occurring with coherent light, in order to optically realize the essential step in compressive sensing which is the multiplication with known random patterns of ...
Delahaies, Agnès +3 more
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Mitigation of Speckle Noise in Optical Coherence Tomograms
2018Optical Coherence Tomography (OCT) is a promising high-resolution imaging technique that works based on low coherent interferometry. However, like other low coherent imaging modalities, OCT suffers from an artifact called, speckle. Speckle reduces the detectability of diagnostically relevant features in the tissue.
Adabi S. +5 more
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Laser Speckle Pattern-A Narrowband Noise Model
Bell System Technical Journal, 1970We represent by an electrical model the imaging of a one-dimensional coherently illuminated and diffusely reflecting surface by an optical system with a rectangular aperture. We then obtain the statistical properties of the image intensity from the statistical properties of the square of the envelope of a narrowband noise signal in the electrical model.
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Detection of Images Immersed in Speckle Noise
Optica Acta: International Journal of Optics, 1971Simple statistical detection theory is applied to the problem of detecting small images immersed in a background of laser-produced speckle. The detection device is assumed to be a flying-spot type of scanning machine which has continuous scanning in both the x and y directions. Two main points have emerged.
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When is speckle noise multiplicative?
Applied Optics, 1982M, Tur, K C, Chin, J W, Goodman
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Speckle-noise filtering based on non-local mean sparse principal component analysis method
Optics and Lasers in Engineering, 2023Yassine Tounsi +2 more
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Local statistics and non-local mean filter for speckle noise reduction in medical ultrasound image
Neurocomputing, 2016Jingfan Fan, Danni Ai, Xuehu Wang
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