Results 41 to 50 of about 2,015 (220)

PolSAR Image Feature Extraction via Co-Regularized Graph Embedding

open access: yesRemote Sensing, 2020
Dimensionality reduction (DR) methods based on graph embedding are widely used for feature extraction. For these methods, the weighted graph plays a vital role in the process of DR because it can characterize the data’s structure information.
Xiayuan Huang, Xiangli Nie, Hong Qiao
doaj   +1 more source

Image fusion techniqes for remote sensing applications [PDF]

open access: yes, 2002
Image fusion refers to the acquisition, processing and synergistic combination of information provided by various sensors or by the same sensor in many measuring contexts.
Bruzzone, Lorenzo   +4 more
core   +1 more source

Classification for Polsar image based on hölder divergences [PDF]

open access: yesThe Journal of Engineering, 2019
(Dis)similarity measures play an important role in the interpretation of polarimetric synthetic aperture radar (PolSAR) images. Here, the authors introduce a kind of similarity measures for PolSAR images based on the concepts of Hölder pseudo‐divergence and Hölder divergence.
Ting Pan   +4 more
openaire   +2 more sources

An Unsupervised PolSAR Image Classification Algorithm Based on Tensor Product Graph Diffusion

open access: yesLeida xuebao, 2019
To overcome the difficulty of similarity expression and the effects of speckle noise in unsupervised classification of Polarimetric Synthetic Aperture Radar (PolSAR) images, a novel unsupervised PolSAR image terrain classification algorithm based on ...
ZOU Huanxin   +5 more
doaj   +1 more source

Optical images-based edge detection in Synthetic Aperture Radar images [PDF]

open access: yes, 2015
We address the issue of adapting optical images-based edge detection techniques for use in Polarimetric Synthetic Aperture Radar (PolSAR) imagery. We modify the gravitational edge detection technique (inspired by the Law of Universal Gravity) proposed by
Barrenechea, Edurne   +5 more
core   +2 more sources

Classification of PolSAR Images by Stacked Random Forests [PDF]

open access: yesISPRS International Journal of Geo-Information, 2018
This paper proposes the use of Stacked Random Forests (SRF) for the classification of Polarimetric Synthetic Aperture Radar images. SRF apply several Random Forest instances in a sequence where each individual uses the class estimate of its predecessor as an additional feature. To this aim, the internal node tests are designed to work not only directly
Ronny Hänsch, Olaf Hellwich
openaire   +3 more sources

Unsupervised Classification of PolSAR Data Using a Scattering Similarity Measure Derived from a Geodesic Distance

open access: yes, 2017
In this letter, we propose a novel technique for obtaining scattering components from Polarimetric Synthetic Aperture Radar (PolSAR) data using the geodesic distance on the unit sphere.
Bhattacharya, Avik   +2 more
core   +1 more source

POLSAR IMAGE CLASSIFICATION USING DIFFERENT CODIFICATIONS BASED ON FISHER VECTORS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Abstract. A PolSAR is an active sensing device capable of providing images that are robust against variations of weather and atmosphere conditions, irrespective of the time of the day they were acquired. For an efficient use of these images it is necessary to have algorithms capable of classifying these images to generate maps with their content ...
J. A. Redolfi   +3 more
openaire   +3 more sources

TCSPANet: Two-Staged Contrastive Learning and Sub-Patch Attention Based Network for PolSAR Image Classification

open access: yesRemote Sensing, 2022
Polarimetric synthetic aperture radar (PolSAR) image classification has achieved great progress, but there still exist some obstacles. On the one hand, a large amount of PolSAR data is captured.
Yuanhao Cui   +4 more
doaj   +1 more source

Fast Matrix Inversion and Determinant Computation for Polarimetric Synthetic Aperture Radar

open access: yes, 2018
This paper introduces a fast algorithm for simultaneous inversion and determinant computation of small sized matrices in the context of fully Polarimetric Synthetic Aperture Radar (PolSAR) image processing and analysis.
Cintra, R. J.   +3 more
core   +1 more source

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