Results 21 to 30 of about 50,323 (284)
Heliyon, 2023 Optical coherence tomography (OCT) imaging is a technique that is frequently used to diagnose medical conditions. However, coherent noise, sometimes referred to as speckle noise, can dramatically reduce the quality of OCT images, which has an adverse ...
Ying Fang +3 more
doaj +1 more source
Fire, 2023 The temperature field and chemiluminescence measurements of axisymmetric flame are obtained simultaneously in only one image. Digital Laser Speckle Displacement measures temperature fields, and direct image flame determines chemiluminescence values ...
J. C. I. Zamarripa-RamÃrez +2 more
doaj +1 more source
Rayleigh-maximum-likelihood bilateral filter for ultrasound image enhancement
BioMedical Engineering OnLine, 2017 Background Ultrasound imaging plays an important role in computer diagnosis since it is non-invasive and cost-effective. However, ultrasound images are inevitably contaminated by noise and speckle during acquisition. Noise and speckle directly impact the
Haiyan Li +5 more
doaj +1 more source
Speckle Suppression Using Cylindrical Self-Diffraction for Cylindrical Phase-Only Hologram
IEEE Photonics Journal, 2021 In the reconstruction of cylindrical phase-only hologram (POH), speckle noise caused by the addition of random phase is rarely discussed. Although some speckle noise suppression algorithms have been proposed for planar POH, it does not work well if they ...
Feng-Ming Jin +5 more
doaj +1 more source
Noise adaptive wavelet thresholding for speckle noise removal in optical coherence tomography. [PDF]
Biomed Opt Express, 2017 Zaki F, Wang Y, Su H, Yuan X, Liu X.
europepmc +2 more sources
Exoplanet detection with simultaneous spectral differential imaging: effects of out-of-pupil-plane optical aberrations [PDF]
, 2006 Imaging faint companions (exoplanets and brown dwarfs) around nearby stars is currently limited by speckle noise. To efficiently attenuate this noise, a technique called simultaneous spectral differential imaging (SSDI) can be used.
Macintosh, Bruce +2 more
core +2 more sources
Noise analysis in outdoor dynamic speckle measurement
Applied Optics, 2023 The dynamic speckle method (DSM) is an effective tool for the estimation of speed of processes. The speed distribution is encoded in a map built by statistical pointwise processing of time-correlated speckle patterns. For industrial inspection, the outdoor noisy measurement is required.
Mikhail Levchenko +6 more
openaire +4 more sources
Speckle noise reduction in optical coherence tomography images based on edge-sensitive cGAN. [PDF]
Biomed Opt Express, 2018 Ma Y +5 more
europepmc +2 more sources
The entropy of keys derived from laser speckle [PDF]
, 2007 Laser speckle has been proposed in a number of papers as a high-entropy source of unpredictable bits for use in security applications. Bit strings derived from speckle can be used for a variety of security purposes such as identification, authentication,
Skoric, B.
core +6 more sources
Wavelet-based denoising for 3D OCT images [PDF]
, 2007 Optical coherence tomography produces high resolution medical images based on spatial and temporal coherence of the optical waves backscattered from the scanned tissue.
De Keyser, Paul +5 more
core +1 more source