Results 11 to 20 of about 3,337,138 (296)
Resolution and Speckle Reduction in Cardiac Imaging. [PDF]
IEEE Trans Ultrason Ferroelectr Freq Control, 2021 Cardiac imaging depends on clear visualization of several different structural and functional components to determine left ventricular and overall cardiac health. Ultrasound imaging is confounded by the characteristic speckle texture resulting from subwavelength scatterers in tissues, which is similar to a multiplicative noise on underlying tissue ...
Bottenus N +4 more
europepmc +3 more sources
Signal diversity for the reduction of signal dropouts and speckle noise in a laser-Doppler extensometer [PDF]
, 2022 A recently demonstrated laser-Doppler extensometer is affected by signal dropouts caused by speckle noise, whereby the carrier-to-noise ratio (C/N) falls below the so-called frequency-modulation threshold.
Fangjian Wang +2 more
core +1 more source
Intrinsic speckle noise in in-line particle holography due to poly-disperse and continuous particle sizes [PDF]
, 2000 In-line particle holography is subject to image deterioration due to intrinsic speckle noise. The resulting reduction in the signal to noise ratio (SNR) of the replayed image can become critical for applications such as holographic particle velocimetry ...
Rodgers, GJ, Edwards, PJ, Hobson, PR
core +4 more sources
Speckle Noise Removal for Synthetic Aperture Radar Imagery Based on Statistics Filters and Nonlinearing Function [PDF]
Engineering and Technology Journal, 2012 Synthetic Aperture Radar (SAR) images are contaminated by multiplicative noise, due to the coherence of the radar wavelength, labeled as speckle noise which results in an important reduction in the efficiency of target detection and classification ...
E kbal H. Ali
doaj +1 more source
Open Computer Science, 2021 Ultrasonography is an extensively used medical imaging technique for multiple reasons. It works on the basic theory of echoes from the tissues under consideration.
Dilna Kaitheri Thacharedath +1 more
doaj +1 more source
Speckle reduction in double-pass retinal images using variable-focus lenses [PDF]
Journal of the European Optical Society-Rapid Publications, 2015 Speckle arises in double-pass images when coherent light is scattered by the retina. Since this noise degrades the images that are used to characterize the eye, there is special attention in reducing speckle when working with instruments based on retina ...
García-Guerra C. E. +3 more
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Speckle Contrast Reduction with a Visible VCSEL Projector [PDF]
Research Ideas and Outcomes, 2016 Speckle contrast reduction in a laser projector that has a VCSEL emitting in the visible spectrum as its light source can be achieved electronically. Employing a drive circuit enables exciting independent longitudinal modes of the VCSEL. By modulating
Metin Sabuncu, İsmail Yilmazlar
doaj +4 more sources
A Comparison of Speckle Reduction Techniques in Medical Ultrasound Imaging
Applied Medical Informatics, 2015 Speckle noise is a multiplicative noise that degrades the visual evaluation in ultrasound imaging. In addition, it limits the efficient application of intelligent image processing algorithms, such as segmentation techniques. Thus, speckle noise reduction
Cristina STOLOJESCU-CRISAN
doaj +1 more source
Nanomaterials, 2021 Lasers distinguish themselves for the high coherence and high brightness of their radiation, features which have been exploited both in fundamental research and a broad range of technologies.
Tao Wang +8 more
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Speckle reduction with adaptive stack filters [PDF]
Pattern Recognition Letters, 2014 Accepted for publication on Pattern Recognition Letters.
María Elena Buemi +2 more
openaire +4 more sources