Results 11 to 20 of about 4,294 (185)
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
doaj +2 more sources
A Versatile Drift-Free Super-Resolution Imaging Method via Oblique Bright-Field Correlation. [PDF]
Adv Sci (Weinh)This study introduces a robust marker‐free drift correction method for single‐molecule localization‐based super‐resolution microscopy. Utilizing oblique illumination, it analyzes bright‐field image feature displacement to achieve sub‐nanometer precision in real‐time drift tracking across all dimensions.
Ma H, Nguyen P, Liu Y.
europepmc +2 more sources
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
doaj +2 more sources
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
doaj +2 more sources
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
doaj +2 more sources
Multi-Incidence Holographic Profilometry for Large Gradient Surfaces with Sub-Micron Focusing Accuracy [PDF]
Sensors, 2021 Surface reconstruction for micro-samples with large discontinuities using digital holography is a challenge. To overcome this problem, multi-incidence digital holographic profilometry (MIDHP) has been proposed. MIDHP relies on the numerical generation of
Moncy Sajeev Idicula +5 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
doaj +5 more sources
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
openaire +7 more sources
zPIE: an autofocusing algorithm for ptychography [PDF]
Optics Letters, 2020 An autofocusing algorithm for ptychography is proposed. The method optimizes a sharpness metric that would be observed in a differential interference microscope and is valid for both amplitude and phase modulating specimens. We experimentally demonstrate that the algorithm, based on the extended ptychographic iterative engine (ePIE), calibrates the ...
Loetgering, Lars +3 more
openaire +3 more sources
Robust autofocusing in microscopy [PDF]
Cytometry, 2000 A critical step in automatic microscopy is focusing. This report describes a robust and fast autofocus approach useful for a wide range of microscopic modalities and preparations.The focus curve is measured over the complete focal range, reducing the chance that the best focus position is determined by dust or optical artifacts.
Hugo Geerts +4 more
openaire +4 more sources