Results 1 to 10 of about 13,290 (279)

Efficient Azimuth Image-Quality Prediction for Block-Design in Squinted Spotlight SAR Imaging [PDF]

open access: yesSensors
This paper presents an efficient image-quality prediction method for planning block processing in squinted spotlight synthetic aperture radar (SAR) imaging. Before real SAR data are divided into processing blocks, candidate processing-reference locations
Boyeon Koh, Dongjun Lee, Ungdai Ko
doaj   +2 more sources

Along- and Cross-Track Relocation for Ground Moving Target in a Squint Multichannel SAR System [PDF]

open access: yesSensors
The squint synthetic aperture radar (SAR) offers flexible beam pointing control and a wider range of applications compared to the side-looking SAR. Unlike the latter, ground moving targets exhibit shifts in both along-track and cross-track directions in ...
Zuzhen Huang   +4 more
doaj   +2 more sources

Refocusing of Moving Ships in Squint SAR Images Based on Spectrum Orthogonalization

open access: yesRemote Sensing, 2021
Moving ship refocusing is challenging because the target motion parameters are unknown. Moreover, moving ships in squint synthetic aperture radar (SAR) images obtained by the back-projection (BP) algorithm usually suffer from geometric deformation and ...
Mengdao Xing, Min Bao, Guang-Cai Sun
exaly   +3 more sources

Study of etiological profile of patients with paralytic strabismus in a tertiary care hospital in India: a cross-sectional study [PDF]

open access: yesPerspectives In Medical Research, 2023
Introduction: Paralytic strabismus, a type of strabismus caused by paralysis of one or more extraocular muscles, can lead to a variety of ocular and psychosocial sequelae. Etiology varies in different types of paralytic strabismus.
Krishna Kishore Arikeri   +4 more
doaj   +1 more source

A novel application of XAI in squinting models: A position paper

open access: yesMachine Learning with Applications, 2023
Artificial Intelligence, and Machine Learning especially, are becoming increasingly foundational to our collective future. Recent developments around generative models such as ChatGPT, and DALL-E represent just the tip of the iceberg in new gadgets that ...
Kenneth Wenger   +5 more
doaj   +1 more source

Frequency-Scaling-Based Spaceborne Squint SAR Sparse Imaging

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
In synthetic aperture radar (SAR), due to the characteristics of squint data in spaceborne imaging geometry, a more accurate range cell migration correction operation is necessary.
Yufan Song   +4 more
doaj   +1 more source

Ground Moving Target Imaging for Highly Squint SAR by Modified Minimum Entropy Algorithm and Spectrum Rotation

open access: yesRemote Sensing, 2021
Ground moving target (GMT) is displaced and defocused in conventional synthetic aperture radar (SAR) image due to the residual phase error of non-cooperative GMT motion. In this study, a GMT imaging (GMTIm) method is proposed for highly squint SAR.
Shichao Xiong   +4 more
doaj   +1 more source

Luxation of Eye ball following trauma: Novel simple treatment

open access: yesIndian Journal of Ophthalmology, 2014
Luxation of the eye globe is a rare occasion but it carries a risk of threat to permanent vision loss especially when associated with very high intraocular pressure. Appropriate intervention should be undertaken instantly.
Essam A Osman, Adel Al-Akeely
doaj   +1 more source

Feedback of final year ophthalmology postgraduates about their residency ophthalmology training in South India

open access: yesIndian Journal of Ophthalmology, 2014
Background and Aims: This study documents a survey of final-year ophthalmology postgraduate students on the subject of their residency training. A similar survey conducted 7 years ago published in IJO had concluded that the residency program was not up ...
K Ajay, R Krishnaprasad
doaj   +1 more source

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