Robust autofocusing for scanning electron microscopy based on a dual deep learning network [PDF]
Scientific Reports, 2021 Scanning electron microscopy (SEM) is a high-resolution imaging technique with subnanometer spatial resolution that is widely used in materials science, basic science, and nanofabrication.
Woojin Lee +5 more
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Innovative Image Processing Method to Improve Autofocusing Accuracy [PDF]
Sensors, 2022 For automated optical inspection, autofocusing microscopes play an important role in capturing clear images of the measured object. At present, the image processing part of optics-based autofocusing microscopes often has various factors, which makes it ...
Chien-Sheng Liu, Ho-Da Tu
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Compressed Sensing Linear Array SAR Autofocusing Imaging via Semi-definite Programming
Leida xuebao, 2018 Linear Array Synthetic Aperture Radar (LASAR) is a novel and promising radar imaging technique. In recent years, Compressed Sensing (CS) sparse recovery has been a research focus for high-resolution three-Dimensional (3-D) LASAR imaging.
Wei Shunjun +3 more
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Abruptly autofocusing waves [PDF]
Optics Letters, 2010 We introduce a new class of (2+1)D spatial and (3+1)D spatiotemporal waves that tend to autofocus in an abrupt fashion. While the maximum intensity of such a radial wave remains almost constant during propagation, it suddenly increases by orders of magnitude right before its focal point.
Efremidis, Nikolaos K. +1 more
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Autofocusing of Maneuvering Targets in Terahertz Inverse Synthetic Aperture Radar Imaging Based on Damped Newton Method [PDF]
Sensors, 2022 Maneuvering target imaging based on inverse synthetic aperture radar (ISAR) imaging has recently drawn significant attention. Among the many autofocusing technologies which are crucial in ISAR imaging, minimum-entropy-based autofocusing (MEA) is highly ...
Hetong Wang +3 more
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Sparse Regularization with a Non-Convex Penalty for SAR Imaging and Autofocusing [PDF]
Remote Sensing, 2022 In this paper, SAR image reconstruction with joint phase error estimation (autofocusing) is formulated as an inverse problem. An optimization model utilising a sparsity-enforcing Cauchy regularizer is proposed, and an alternating minimization framework ...
Zi-Yao Zhang +3 more
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A Novel Fuzzy Controller for Visible-Light Camera Using RBF-ANN: Enhanced Positioning and Autofocusing [PDF]
Sensors, 2022 To obtain high-precision for focal length fitting and improve the visible-light camera autofocusing speed, simultaneously, the backlash caused by gear gaps is eliminated.
Junpeng Zhou +4 more
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Fast autofocusing based on single-pixel moment detection [PDF]
Communications EngineeringTraditional image processing-based autofocusing techniques require the acquisition, storage, and processing of large amounts of image sequences, constraining focusing speed and cost.
Huiling Chen +6 more
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Experimental generation of arbitrary abruptly autofusing Circular Airy Gaussian vortex vector beams [PDF]
Scientific Reports, 2022 Complex vector modes represent a general state of light nonseparable in their spatial and polarization degrees of freedom, which have inspired a wide variety of novel applications and phenomena, such as their unexpected propagation behaviour. For example,
Xiao-Bo Hu +3 more
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Random Stepped Frequency ISAR 2D Joint Imaging and Autofocusing by Using 2D-AFCIFSBL [PDF]
Remote SensingWith the increasingly complex electromagnetic environment faced by radar, random stepped frequency (RSF) has garnered widespread attention owing to its remarkable Electronic Counter-Countermeasure (ECCM) characteristic, and it has been universally ...
Yiding Wang +3 more
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