Results 31 to 40 of about 52,858 (287)
Deep Learning for Integrated Speckle Reduction and Super-Resolution in Multi-Temporal SAR
Remote Sensing, 2023 In the domain of synthetic aperture radar (SAR) image processing, a prevalent issue persists wherein research predominantly focuses on single-task learning, often neglecting the concurrent impact of speckle noise and low resolution on SAR images ...
Lijing Bu +4 more
doaj +1 more source
Estimation of Ultrasound Echogenicity Map from B-Mode Images Using Convolutional Neural Network
Sensors, 2020 In ultrasound B-mode imaging, speckle noises decrease the accuracy of estimation of tissue echogenicity of imaged targets from the amplitude of the echo signals.
Che-Chou Shen, Jui-En Yang
doaj +1 more source
Reduction of Multiplicative Noise in Radar Images
Известия высших учебных заведений России: Радиоэлектроника, 2021 Introduction. A radar image is an image obtained by remote sensing the earth's surface with a radar device. Radar images are characterized by background graininess caused by speckle noise, which should be filtered to improve the quality of radar images ...
A. A. Tuzova, V. A. Pavlov, A. A. Belov
doaj +1 more source
Speckle Reduction in SAR Images
, 2023 High-resolution synthetic aperture radar (SAR) systems with various imaging modalities, including polarimetric, interferometric, multi-frequency, and multi-temporal information, are widely used in Earth observation and remote sensing. The occurrence of speckle in SAR images, however, affects the performance of all image processing techniques and may ...
Aghababaei, Hossein, Stein, A.
openaire +1 more source
Speckle Reduction Using Adaptive Receive-Side Compounding [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2021 A typical approach to reduce speckle in coherent imaging systems is to average same-target images with different speckle realizations. We study settings where such realizations come from applying different transducer-array element weights at reception, referred to here as receive compounding. An effect of such compounding is reduced spatial resolution,
Are Charles Jensen, Andreas Austeng
openaire +4 more sources
Non-Local Means De-Speckling Based on Multi-Directional Local Plane Inclination Angle
Remote Sensing, 2023 The unavoidable speckle in SAR images seriously interferes with image quality and has a negative effect on subsequent image interpretation. The existing filters still need to be strengthened in terms of both noise suppression and edge preservation. Based
Fengcheng Guo, Haoran Tang, Wensong Liu
doaj +1 more source
The entropy of keys derived from laser speckle
, 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 +4 more sources
Applied Sciences, 2018 Ultrasound images are corrupted with multiplicative noise known as speckle, which reduces the effectiveness of image processing and hampers interpretation.
Mohamed Yaseen Jabarulla, Heung-No Lee
doaj +1 more source
Methods for Determination of Mean Speckle Size in Simulated Speckle Pattern
Measurement Science Review, 2014 This paper deals with computation of mean speckle size in a speckle pattern generated through a numerical simulation of speckle after reflection of a Gaussian beam off a rough object’s surface. Within this simulation various speckle patterns are obtained
Hamarová I. +3 more
doaj +1 more source
Deep Learning-Based Ultrasound Image Despeckling by Noise Model Estimation [PDF]
Iranian Journal of Electrical and Electronic Engineering, 2023 Speckle noise is an inherent artifact appearing in medical images that significantly lowers the quality and accuracy of diagnosis and treatment.
O. Mahmoudi Mehr +2 more
doaj