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Sar images
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The paper "A combination of ALOS-2, Sentinel-1 imagery for rapid deforestation detection in Vietnam" focuses on combining two different wavelength SAR data types (C-band and L-band), HV and HH polarizations to detect clear-cut and forest fires. The author uses the method of comparing the backscatter values before and after deforestation to detect forest loss, with the Sentinel-1 time series data using the RCR (Radar Change Ratio) method, while the three ALOS-2 image scenes use the RGB composite method.
11p
tukhauquantuong1011
22-04-2024
5
2
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The paper "Investigate SAR intensity and optical images to rapidly detect small and medium landslides in Mu Cang Chai district Yen Bai province" presents a combination of methods to determine changes in SAR intensity between two time periods and track land use/coverage changes before and after landslides, aiding in the rapid detection of small and medium landslide points in the mountainous areas of northeastern Vietnam.
8p
tukhauquantuong1011
22-04-2024
2
2
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The paper proposed a method to build the flood water depth map of Quang Binh province, Vietnam in the historical flood 2020 based on Sentinel1A satellite images. This method is a combination of the classical Otsu method and the proposed spreading method.
9p
viharry
15-12-2022
4
2
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This paper proposes a method to increase the accuracy in estimating forests height using polarimetric interferometry UAV-SAR images. The forest parameters extracted by the proposed method are implemented through three stages. The topographic phase and mean extinction coefficients can be determined in the first two steps through analyzing eigenvalues of the interferometry coherence matrix.
9p
vikissinger
03-03-2022
11
1
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This paper developed a novel solution of the change detection based on a combination of the Neighbor-based Ratio operator and the Convolutional Wavelet Neural Network algorithm for improving the accuracy of change detection in multi-temporal SAR images.
8p
nguaconbaynhay12
13-06-2021
34
1
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The paper proposed a novel threshold based algorithm of oil spill detection in the Synthetic Aperture Radar images. This threshold is a global one determined according to statistical analysis of pixel intensities of the images and their sizes. The simulation results of the proposed method on Python software were compared with other methods, and proved that the proposed method significantly improved accuracy.
8p
nguaconbaynhay12
13-06-2021
12
1
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The paper presents the method of urban classification using the coherence characteristics of pairs of SAR images observed at different times. Two scenes of Sentinel-1A VV and VH polarized on January 16, 2020, and January 28, 2020, in some central districts of Hanoi city were used experimentally in this study.
10p
nguaconbaynhay11
07-04-2021
10
2
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Newly developed simultaneous multi-slice (SMS) scans are now being introduced as a clinical application in neuroimaging. We examined the feasibility of SMS scans for joint imaging. The purpose of the present study was to prospectively compare the resolution and specific absorption rate (SAR) obtained using SMS to those of conventional methods in hip joint magnetic resonance imaging (MRI) and establish whether imaging times may be reduced using SMS in 3 T MRI and if image quality is affected.
8p
vivermont2711
28-01-2021
10
1
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Algorithms of change detection in multi-temporal SAR images have received great interests for recent decades, and been widely applied in natural resource supervision activities. However, these algorithms still expose the limitation of detection accuracy due to inhenrent presence of speckle noise in SAR images. This paper developed a novel approach of change detection in multi-temporal SAR images of sea surface. The algorithm has increased accuracy of change detection in multi-temporal SAR images of sea surface compared with recent other methods.
8p
12120609
01-06-2020
16
1
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Rice acreage estimation using Sentinel-1A dual polarised SAR data in Udham Singh Nagar (Uttarakhand)
Udham Singh Nagar is one of major rice producing area of Uttarakhand state, and it falls in Tarai region. The soils of the region are considered as most fertile land in India and aptly support rice production. Rice is a mainly grown in the rainy season which results in a limited number of cloud-free optical remote sensing images for estimation of rice acreage and its monitoring. Sentinel-1A is a European radar imaging satellite launched in 2014. Sentinel-1A satellite launched as a part of the European Union's Copernicus program which provide Synthetic aperture radar (SAR) data i.e.
7p
kethamoi4
18-04-2020
14
1
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The increased demand for higher resolution and detailed SAR imaging builds up a pressure on the processing power of the existing systems for real time or near real time processing. Exploitation of GPU processing power could suffice the increasing demands in processing. The processing of initial SAR systems was based on the principles of Fourier Optics.
5p
vititan2711
13-08-2019
11
1
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The results of proposal method were compared to those of widely used Otsu method and the reference data (e.g. Lansat 7, 8) gave the highest Completeness (User accuracy), Correctness (Producer accuracy) and Quality (Overall accuracies) at 98.8%, 90.7 % and 89.7 %, respectively. The employed method is straightforward, easy to implement and may be applied for other areas even at regional or global scales.
0p
meolep4
02-01-2019
19
1
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This paper presents a methodology to determine inundation area in a flood event in Ha Tinh Province, Vietnam, by applying Synthetic Aperture Radar (SAR) image processing, in combination with Digital Elevation Model (DEM) for threshold detection. Sentinel-1 images were down loaded from an open source provided by European Space Agency (ESA). DEM data were collected from United States Geological Survey (USGS).
5p
thihuynh3006
16-03-2018
28
0
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Similarly, while companies in New York and Ohio filed SARs through multiple entities, a single firm in each state filed the majority of SARs. This was also the case for Wisconsin, ranked fourth among filing locations. For that state, five separate insurance carriers, through one entity, generated 88 percent of filings for the twelve- month period. Unlike in Massachusetts, the Wisconsin-based firm was not affiliated with other companies in and/or from the state during the same time frame.
43p
thangbienthai
23-11-2012
53
6
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Image recognition and classification is one of the most actively pursued areas in the broad field of imaging sciences and engineering. The reason is evident: the ability to replace human visual capabilities with a machine is very important and there are diverse applications. The main idea is to inspect an image scene by processing data obtained from sensors.
493p
echbuon
02-11-2012
59
4
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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Adaptive S-Method for SAR/ISAR Imaging
10p
dauphong18
24-02-2012
51
7
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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Polarimetric SAR Image Classification Using Multifeatures Combination and Extremely Randomized Clustering Forests
9p
dauphong15
18-02-2012
46
2
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Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Fast correlation technique for glacier flow monitoring by digital camera and space-borne SAR images
15p
sting03
06-02-2012
43
4
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Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài : Resolution-enhanced radar/SAR imaging: an experiment design framework combined with neural network-adapted variational analysis regularization
11p
dauphong11
06-02-2012
56
2
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Journal of Orthopaedic Surgery and Research Research article BioMed Central Open Access The use of average Pavlov ratio to predict the risk of post operative upper limb palsy after posterior cervical decompression Koon-Man Sieh*1, Siu-Man Leung1, Judy Suk Yee Lam2, Kai Yin Cheung1 and Kwai Yau Fung1 Address: 1Department of Orthopaedics and Traumatology, Alice Ho Mui Ling Nethersole Hospital, Tai Po, NT, Hong Kong SAR, PR China and 2Department of Diagnostic Radiology and organ Imaging, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong SAR, PR China Email...
9p
sting01
15-01-2012
41
4
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