Results 11 to 20 of about 50,323 (284)
Polarimetric SAR Speckle Noise Model [PDF]
IEEE Transactions on Geoscience and Remote Sensing, 2003 Synthetic aperture radar (SAR) data are affected by speckle noise, originated by the SAR system’s coherent nature. The problem of speckle noise in one-dimensional (1-D) data is already solved, as speckle has a multiplicative characteristic. SAR polarimetry represents an extension to multidimensional data by the use of polarization wave diversity.
López Martínez, Carlos +1 more
exaly +5 more sources
Remote Sensing, 2019 Synthetic aperture radar (SAR) images map Earth’s surface at high resolution, regardless of the weather conditions or sunshine phenomena. Therefore, SAR images have applications in various fields.
Hyunho Choi, Jechang Jeong
doaj +3 more sources
SSN2V: unsupervised OCT denoising using speckle split
Scientific Reports, 2023 Denoising in optical coherence tomography (OCT) is important to compensate the low signal-to-noise ratio originating from laser speckle. In recent years learning algorithms have been established as the most powerful denoising approach.
Julia Schottenhamml +6 more
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
Edge Enhancing Accelerated Diffusion Model for Speckle Denoising in Medical Imagery [PDF]
ITM Web of Conferences, 2019 Speckle noise occurs in a wide range of medical images due to sampling and digital degradation. Removing speckle noise from medical images is the key for further automated processing techniques like segmentation, and can help the clinicians with better ...
Bagchi Misra Arundhati +2 more
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 Decorrelation and Dynamic Range in Speckle Noise–limited Imaging [PDF]
The Astrophysical Journal, 2002 The useful dynamic range of an image in the diffraction limited regime is usually limited by speckles caused by residual phase errors in the optical system forming the image. The technique of speckle decorrelation involves introducing many independent realizations of additional phase error into a wavefront during one speckle lifetime, changing the ...
Sivaramakrishnan, Anand +3 more
openaire +2 more sources
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
doaj +1 more source
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
doaj +1 more source
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