Results 81 to 90 of about 13,506 (143)
A Hybrid Motion Compensation Scheme for THz-SAR with Composite Modulated Waveform
Remote SensingTerahertz Synthetic Aperture Radar (THz-SAR) is highly sensitive to platform vibrations and trajectory deviations, which introduce severe phase errors and limited resolution.
Chongzheng Wu +3 more
doaj +1 more source
Closed-Loop Autofocus Scheme for Scanning Electron Microscope
MATEC Web of Conferences, 2015 In this paper, we present a full scale autofocus approach for scanning electron microscope (SEM). The optimal focus (in-focus) position of the microscope is achieved by maximizing the image sharpness using a vision-based closed-loop control scheme.
Cui Le +4 more
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Robust Two-Dimensional Spatial-Variant Map-Drift Algorithm for UAV SAR Autofocusing
Remote Sensing, 2019 Autofocus has attracted wide attention for unmanned aerial vehicle (UAV) synthetic aperture radar (SAR) systems, because autofocus process is crucial and difficult when the phase error is spatially dependent on both range and azimuth directions.
Guanyong Wang +4 more
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CONTENT-BASED AUTOFOCUSING IN AUTOMATED MICROSCOPY
Image Analysis and Stereology, 2010 Autofocusing is the fundamental step when it comes to image acquisition and analysis with automated microscopy devices. Despite all efforts that have been put into developing a reliable autofocus system, recent methods still lack robustness towards ...
Peter Hamm +2 more
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Image Visual Quality: Sharpness Evaluation in the Logarithmic Image Processing Framework
Big Data and Cognitive ComputingIn image processing, the acquisition step plays a fundamental role because it determines image quality. The present paper focuses on the issue of blur and suggests ways of assessing contrast. The logic of this work consists in evaluating the sharpness of
Arnaud Pauwelyn +4 more
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Autofocusing-based visual servoing : application to MEMS micromanipulation. [PDF]
, 2010 International audienceIn MEMS microassembly areas, different methods of automatic focusing are presented in the literature. All these methods have a common point.
Dembélé, Sounkalo +5 more
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Autofocusing Method Based on Dynamic Modulation Transfer Function Feedback
PhotonicsAccurate measurement of key optical system parameters (such as focal length, distortion, and modulation transfer function (MTF)) depends critically on obtaining sharp images.
Zhijing Fang +5 more
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Technical note : TRACKFlow, a new versatile microscope system forfission track analysis [PDF]
, 2019 We here present TRACKFlow, a new system with dedicated modules for the fission track (FT) laboratory. It is based on the motorised Nikon Eclipse Ni-E upright microscope with the Nikon DS-Ri2 full frame camera and is embedded within the Nikon NIS-Elements
Baert, Philippe +3 more
core +1 more source
Design and Experimental Validation of a Line-Laser Autofocusing System With Extended Working Range
IEEE Photonics JournalAutofocus (AF) technology plays a critical role in applications such as microscopic measurement, 3D visual scanning, and semiconductor defect inspection.
Xiaoxiao Wei +4 more
doaj +1 more source
Remote SensingSynthetic aperture radar (SAR) is an all-weather and all-day imaging technique for Earth observation. Achieving efficient observation, high resolution, and wide swath coverage have remained critical development goals in SAR technology, which inherently ...
Kaiwen Zhu +4 more
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