Results 21 to 30 of about 133,909 (293)
Polarimetric SAR Speckle Reduction by Hybrid Iterative Filtering
IEEE Access, 2020 Speckle filtering in synthetic aperture radar polarimetry (PolSAR) is essential for the extraction of significant information. In this study, the authors introduced a hybrid iterative filtering scheme.
Mohamed Yahia +4 more
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Despeckling of Ultrasound Images Using Block Matching and SVD in Sparse Representation
Sensors, 2022 This work proposes a novel scheme for speckle suppression on medical images acquired by ultrasound sensors. The proposed method is based on the block matching procedure by using mutual information as a similarity measure in grouping patches in a ...
Rogelio Reyes-Reyes +5 more
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Speckle‐Based Optical Cryptosystem and its Application for Human Face Recognition via Deep Learning
Advanced Science, 2022 Face recognition has become ubiquitous for authentication or security purposes. Meanwhile, there are increasing concerns about the privacy of face images, which are sensitive biometric data and should be protected. Software‐based cryptosystems are widely
Qi Zhao +9 more
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Speckle Reduction Using Multiple Tones of Illumination [PDF]
, 1973 The occurrence and smoothing of speckle are studied as a function of the line width for a highly collimated illuminating source. A general theory is presented for speckling in the image of a partially diffuse, phase type of object, which has a variable ...
George, Nicholas, Jain, Atul
core +1 more source
Photonics, 2023 A convolutional neural network (CNN) was used to identify the morphology of rough particles from their interferometric images. The tested particles had the shapes of sticks, crosses, and dendrites as well as Y-like, L-like, and T-like shapes.
Alexis Abad +5 more
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Photonics, 2023 Vortex beams carry orbital angular momentum (OAM), and their inherent infinite dimensional eigenstates can enhance the ability for optical communication and information processing in the classical and quantum fields.
Yanzhu Zhang +4 more
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Journal of Medical Ultrasound, 2020 The "snowstorm" sign refers to the ultrasound appearance of motile hyperechoic specks within synovial fluid and has been reported to have a high specificity for gout. We describe three additional etiologies commonly encountered in the rheumatology clinic that can produce a snowstorm: calcium pyrophosphate deposition disease, fibrin collections/rice ...
Benjamin Persons, Eugene Y Kissin
openaire +3 more sources
European Journal of Remote Sensing, 2020 Excellent operation regardless of weather conditions and superior resolution independent of sensor light are the most attractive and desired features of synthetic aperture radar (SAR) imagery.
R. Vijaya Geetha, S. Kalaivani
doaj +1 more source
Convolutional Neural Network and Guided Filtering for SAR Image Denoising
Remote Sensing, 2019 Coherent noise often interferes with synthetic aperture radar (SAR), which has a huge impact on subsequent processing and analysis. This paper puts forward a novel algorithm involving the convolutional neural network (CNN) and guided filtering for SAR ...
Shuaiqi Liu +6 more
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Toward an Estimation of the Optical Feedback Factor C on the Fly for Displacement Sensing
Sensors, 2021 In this paper, a method based on the inherent event-based sampling capability of laser optical feedback interferometry (OFI) is proposed to assess the optical feedback factor C when the laser operates in the moderate and strong feedback regimes.
Olivier D. Bernal +3 more
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