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Recently, deep learning methods have achieved superior performance for Polarimetric Synthetic Aperture Radar(PolSAR) image classification. Existing deep learning methods learn PolSAR data by converting the covariance matrix into a feature…

Computer Vision and Pattern Recognition · Computer Science 2023-12-07 Junfei Shi , Wei Wang , Haiyan Jin , Mengmeng Nie , Shanshan Ji

Deep learning has been extensively utilized for PolSAR image classification. However, most existing methods transform the polarimetric covariance matrix into a real- or complex-valued vector to comply with standard deep learning frameworks…

Computer Vision and Pattern Recognition · Computer Science 2025-07-08 Junfei Shi , Yuke Li , Mengmeng Nie , Fang Liu , Haiyan Jin , Junhuai Li , Weisi Lin

As a representation learning method, nearest regularized subspace(NRS) algorithm is an effective tool to obtain both accuracy and speed for PolSAR image classification. However, existing NRS methods use the polarimetric feature vector but…

Image and Video Processing · Electrical Eng. & Systems 2023-02-08 Junfei Shi , Haiyan Jin

Classification of polarimetric synthetic aperture radar (PolSAR) images is an active research area with a major role in environmental applications. The traditional Machine Learning (ML) methods proposed in this domain generally focus on…

Computer Vision and Pattern Recognition · Computer Science 2024-09-10 Mete Ahishali , Serkan Kiranyaz , Turker Ince , Moncef Gabbouj

Polarimetric synthetic aperture radar (PolSAR) images encompass valuable information that can facilitate extensive land cover interpretation and generate diverse output products. Extracting meaningful features from PolSAR data poses…

Computer Vision and Pattern Recognition · Computer Science 2026-05-18 Mohammed Q. Alkhatib , M. Sami Zitouni , Mina Al-Saad , Nour Aburaed , Hussain Al-Ahmad

Efficient and accurate polarimetric synthetic aperture radar (PolSAR) image classification with a limited number of prior labels is always full of challenges. For general supervised deep learning classification algorithms, the…

Computer Vision and Pattern Recognition · Computer Science 2020-01-22 Dongling Xiao , Chang Liu , Qi Wang , Chao Wang , Xin Zhang

We propose a deep learning method for single image super-resolution (SR). Our method directly learns an end-to-end mapping between the low/high-resolution images. The mapping is represented as a deep convolutional neural network (CNN) that…

Computer Vision and Pattern Recognition · Computer Science 2015-08-03 Chao Dong , Chen Change Loy , Kaiming He , Xiaoou Tang

Data encoded as symmetric positive definite (SPD) matrices frequently arise in many areas of computer vision and machine learning. While these matrices form an open subset of the Euclidean space of symmetric matrices, viewing them through…

Computer Vision and Pattern Recognition · Computer Science 2015-12-18 Anoop Cherian , Suvrit Sra

Convolutional neural networks (CNNs) have been widely used to improve the accuracy of polarimetric synthetic aperture radar (PolSAR) image classification. However, in most studies, the difference between PolSAR images and optical images is…

Computer Vision and Pattern Recognition · Computer Science 2019-09-13 Lamei Zhang , Hongwei Dong , Bin Zou

Super-resolution (SR) aims to increase the resolution of imagery. Applications include security, medical imaging, and object recognition. We propose a deep learning-based SR system that takes a hexagonally sampled low-resolution image as an…

Image and Video Processing · Electrical Eng. & Systems 2021-11-05 Dylan Flaute , Russell C. Hardie , Hamed Elwarfalli

In this work, we exploit convolutional neural networks (CNNs) for the classification of very high resolution (VHR) polarimetric SAR (PolSAR) data. Due to the significant appearance of heterogeneous textures within these data, not only…

Computer Vision and Pattern Recognition · Computer Science 2020-04-13 Minh-Tan Pham , Sébastien Lefèvre

In the domain of image-set based classification, a considerable advance has been made by representing original image sets as covariance matrices which typical lie in a Riemannian manifold. Specifically, it is a Symmetric Positive Definite…

Computer Vision and Pattern Recognition · Computer Science 2018-11-20 Rui Wang , Xiao-Jun Wu , Josef Kittler

One impressive advantage of convolutional neural networks (CNNs) is their ability to automatically learn feature representation from raw pixels, eliminating the need for hand-designed procedures. However, recent methods for single image…

Computer Vision and Pattern Recognition · Computer Science 2016-07-27 Yifan Wang , Lijun Wang , Hongyu Wang , Peihua Li

Symmetric Positive Definite (SPD) matrix learning methods have become popular in many image and video processing tasks, thanks to their ability to learn appropriate statistical representations while respecting Riemannian geometry of…

Computer Vision and Pattern Recognition · Computer Science 2016-12-23 Zhiwu Huang , Luc Van Gool

Convolutional neural networks (CNNs) have been applied to learn spatial features for high-resolution (HR) synthetic aperture radar (SAR) image classification. However, there has been little work on integrating the unique statistical…

Computer Vision and Pattern Recognition · Computer Science 2022-05-04 Wenkai Liang , Yan Wu , Ming Li , Peng Zhang , Yice Cao , Xin Hu

Polarimetric synthetic aperture radar (PolSAR) image interpretation is widely used in various fields. Recently, deep learning has made significant progress in PolSAR image classification. Supervised learning (SL) requires a large amount of…

Computer Vision and Pattern Recognition · Computer Science 2024-05-07 Jianfeng Cai , Yue Ma , Zhixi Feng , Shuyuan Yang

Localizing more sources than sensors with a sparse linear array (SLA) has long relied on minimizing a distance between two covariance matrices and recent algorithms often utilize semidefinite programming (SDP). Although deep neural network…

Signal Processing · Electrical Eng. & Systems 2025-03-11 Kuan-Lin Chen , Bhaskar D. Rao

Being symmetric positive-definite (SPD), covariance matrix has traditionally been used to represent a set of local descriptors in visual recognition. Recent study shows that kernel matrix can give considerably better representation by…

Computer Vision and Pattern Recognition · Computer Science 2017-11-15 Melih Engin , Lei Wang , Luping Zhou , Xinwang Liu

Speckle suppression in synthetic aperture radar (SAR) images is a key processing step which continues to be a research topic. A wide variety of methods, using either spatially-based approaches or transform-based strategies, have been…

Computer Vision and Pattern Recognition · Computer Science 2024-08-30 Alejandro Mestre-Quereda , Juan M. Lopez-Sanchez

Image based localization is one of the important problems in computer vision due to its wide applicability in robotics, augmented reality, and autonomous systems. There is a rich set of methods described in the literature how to…

Computer Vision and Pattern Recognition · Computer Science 2017-12-12 Pulak Purkait , Cheng Zhao , Christopher Zach
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