Results 31 to 40 of about 1,689,718 (367)
Non-Local SAR Image Despeckling Based on Sparse Representation
Remote Sensing, 2023 Speckle noise is an inherent problem of synthetic aperture radar (SAR) images, which not only seriously affects the acquisition of SAR image information, but also greatly reduces the efficiency of image segmentation and feature classification. Therefore,
Houye Yang, Jindong Yu, Zhuo Li, Ze Yu
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Entropy Based Parameter Estimation of 2D Gaussian Filter for Image Speckle Noise Removal [PDF]
AUT Journal of Electrical Engineering, 2021 In this paper, a speckle noise suppression algorithm based on the 2D Gaussian filter is addressed, which employs entropy to estimate the filter's variance effectively.
Zahra Hosseini +1 more
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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
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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
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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
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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
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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
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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
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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
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Wavelet domain compounding for speckle reduction in optical coherence tomography [PDF]
, 2013 Visibility of optical coherence tomography (OCT) images can be severely degraded by speckle noise. A computationally efficient despeckling approach that strongly reduces the speckle noise is reported.
Chui, PC +6 more
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