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Speed-up of optical scanner characterization subsystem

Roger D. Clements, Elisa H. Barney Smith, Tapas Kanungo, Elisa H. Barney Smith, Jianying Hu, Paul B. Kantor
2003 Document Recognition and Retrieval X  
Small image deformations such as those introduced by optical scanners significantly reduce the accuracy rate of optical character recognition (OCR) software.  ...  Characterization of the scanner used in the OCR process may diminish the impact on recognition rates.  ...  The operations of 1) level curve extraction, and 2) the location of intersections, constitute the bulk of the time spent by the subsystem to characterize the scanner, and methods to reduce these execution  ... 
doi:10.1117/12.476060 dblp:conf/drr/ClementsS03 fatcat:5x3qxmjc3fa4holw225xiwrigi

Subsystem throughputs of a clinical picture archiving and communications system

Albert W. K. Wong, H. K. Huang
1992 Journal of digital imaging  
The throughput rate of each PACS subsystem was measured in terms of average residence time of individual images in the subsystem.  ...  The overall throughput of the PACS was measured as the total residence time of an image in the various subsystems.  ...  Therefore, it is necessary for the manufacturers to speed up the image transmission from the imaging devices and the archive devices to improve the overall performance of the PACS.  ... 
doi:10.1007/bf03167807 pmid:1457541 fatcat:vth4krys2zclxo75fdqvsyn65e

En-face optical coherence tomography/fluorescence endomicroscopy for minimally invasive imaging using a robotic scanner

Manuel J. Marques, Michael R. Hughes, Khushi Vyas, Andrew Thrapp, Haojie Zhang, Adrian Bradu, Grigory Gelikonov, Petros Giataganas, Christopher J. Payne, Guang-Zhong Yang, Adrian Podoleanu
2019 Journal of Biomedical Optics  
We report a compact rigid instrument capable of delivering en-face optical coherence tomography (OCT) images alongside (epi)-fluorescence endomicroscopy (FEM) images by means of a robotic scanning device  ...  The robotic scanning system provides the second axis of scanning for the OCT channel while allowing the field of view (FoV) of the FEM channel to be increased by mosaicking.  ...  Lateral resolution (μm) Axial resolution (μm) FoV (mm 2 ) Optical power on the sample (mW) Imaging speed OCT subsystem 60 24 (with Hamming window) 2.7 × 1.6 (over a 1 mm working distance  ... 
doi:10.1117/1.jbo.24.6.066006 pmid:31222989 pmcid:PMC6977172 fatcat:6nvuxlbrpfcs5k5vrlzfumfp3e

Integrated adaptive optics optical coherence tomography and adaptive optics scanning laser ophthalmoscope system for simultaneous cellular resolution in vivo retinal imaging

Robert J. Zawadzki, Steven M. Jones, Suman Pilli, Sandra Balderas-Mata, Dae Yu Kim, Scot S. Olivier, John S. Werner
2011 Biomedical Optics Express  
In this design both imaging modalities share most of the optical components including a common AO-subsystem and vertical scanner.  ...  We describe an ultrahigh-resolution (UHR) retinal imaging system that combines adaptive optics Fourier-domain optical coherence tomography (AO-OCT) with an adaptive optics scanning laser ophthalmoscope  ...  To allow different acquisition planes of SLO (En-face x-y plane) and Acknowledgments We gratefully acknowledge the contributions of UC Davis Department of Ophthalmology & Vision Science faculty and staff  ... 
doi:10.1364/boe.2.001674 pmid:21698028 pmcid:PMC3114233 fatcat:jjpk4mp3erahfk74fbpm5iob3q

METimage: an innovative multi-spectral imaging radiometer for the EUMETSAT polar system follow-on satellite mission

Matthias Alpers, Christian Brüns, Alexander Pillukat, Josiane Costeraste, Errico Armandillo, Nikos Karafolas
2017 International Conference on Space Optics — ICSO 2008  
The evolving needs of the meteorological community concerning the EUMETSAT Polar System follow-on satellite mission (Post-EPS) require the development of a high-performance multi-spectral imaging radiometer  ...  As the scan speed is high with respect to the satellite ground speed, the scan lines provide gapless ground coverage, in spite of the scanner rotating through some "dead angle" where no imaging is performed  ...  So the development focuses on a system design, which has the desirable property of weakly interdependent subsystems and on mastering the core technologies within each subsystem.  ... 
doi:10.1117/12.2308292 fatcat:o5hrsy2v3ne5tdkd2dp7nmhlra

PHEBUS: A double ultraviolet spectrometer to observe Mercury's exosphere

E. Chassefière, J.-L. Maria, J.-P. Goutail, E. Quémerais, F. Leblanc, S. Okano, I. Yoshikawa, O. Korablev, V. Gnedykh, G. Naletto, P. Nicolosi, M.-G. Pelizzo (+40 others)
2010 Planetary and Space Science  
PHEBUS will address the following main scientific objectives relative to Mercury's exosphere: determination of the composition and the vertical structure of the exosphere; characterization of the exospheric  ...  dynamics: day to night circulation, transport between active and inactive regions; study of surface release processes; identification and characterization of the sources of exospheric constituents; detection  ...  Scanning is performed by a rotation of the scanner head around the optical axis of the spectrometer traversing its slit.  ... 
doi:10.1016/j.pss.2008.05.018 fatcat:xq3e5szthzewlkee3shcwzp4xa

Remote sensing of multi-level wind fields with high-energy airborne scanning coherent Doppler lidar

Jeffry Rothermel, Lisa D. Olivier, Robert M. Banta, R. Michael Hardesty, James N. Howell, Dean R. Cutten, Steven C. Johnson, Robert T. Menzies, David M. Tratt
1998 Optics Express  
Examples of wind measurements are given for the marine boundary layer and near the coastline of the western United States.  ...  Applications include the study of severe and non-severe atmospheric flows, intercomparisons with other sensors, and the simulation of prospective satellite Doppler lidar wind profilers.  ...  We acknowledge the assistance of the DC-8 pilots and ground support team of the NASA Ames Research Center.  ... 
doi:10.1364/oe.2.000040 pmid:19377577 fatcat:uvb2bue5lvev3a5jo63t5ii2qi

Open Source 3D Multipurpose Measurement System with Submillimetre Fidelity and First Application in Magnetic Resonance

Haopeng Han, Raphael Moritz, Eva Oberacker, Helmar Waiczies, Thoralf Niendorf, Lukas Winter
2017 Scientific Reports  
Magnetic field mapping of a single ring Halbach magnet, a 3.0 T and a 7.0 T MR scanner as well as temperature mapping of a radio frequency coil were successfully conducted.  ...  Magnetic resonance imaging (MRI) is the mainstay of diagnostic imaging, a versatile instrument for clinical science and the subject of intense research interest.  ...  COSI Measure was positioned at the rear end of the patient table of a 3.0 T MR scanner and at the back side of a 7.0 T MR scanner to characterize the stray magnetic field strength and uniformity in an  ... 
doi:10.1038/s41598-017-13824-z pmid:29044156 pmcid:PMC5647334 fatcat:axgabaqajngjlksyvrx4abzlfy

Advancements in the U.S. army corps of engineers hydrographic survey capabilities: The SHOALS system

Jeff Lillycrop, John R. Banic
1992 Marine Geodesy  
make up the SHOALS system.  ...  system generates a swath width of just over 140 meters.  ...  Army Corps of Engineers, Operations, Construction, and Readiness Division and the Department of Industry, Science, and Technology, Canada.  ... 
doi:10.1080/01490419209388053 fatcat:vxgibc6wpvdhtc2qmd2bohyg4y

High resolution, wide field of view, real time 340GHz 3D imaging radar for security screening

Duncan A. Robertson, David G. Macfarlane, Robert I. Hunter, Scott L. Cassidy, Nuria Llombart, Erio Gandini, Tomas Bryllert, Mattias Ferndahl, Hannu Lindström, Jussi Tenhunen, Hannu Vasama, Jouni Huopana (+4 others)
2017 Passive and Active Millimeter-Wave Imaging XX  
A sparse array of 16 radar transceivers is coupled with high speed mechanical beam scanning to achieve a field of view of ~ 1 x 1 x 1 m 3 and a 10 Hz frame rate.  ...  We report on the development of the 340 GHz 3D imaging radar which achieves high volumetric resolution over a wide field of view with high dynamic range and a high frame rate.  ...  ACKNOWLEDGEMENTS Part of the research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 312745.  ... 
doi:10.1117/12.2262264 fatcat:ywwagxhs2fcqzhzw7uczsybgai

The CONSORTIS 16-channel 340 GHz security imaging radar

Duncan A. Robertson, David G. Macfarlane, Robert I. Hunter, Scott L. Cassidy, Nuria Llombart, Erio Gandini, Tomas Bryllert, Mattias Ferndahl, Hannu Lindström, Jussi Tenhunen, Hannu Vasama, Jouni Huopana (+3 others)
2018 Passive and Active Millimeter-Wave Imaging XXI  
A large data collection trial on targets of interest has been conducted to support the development of automatic anomaly detection software.  ...  The full system will ultimately also incorporate a dual-band passive submillimeter wave imager and automatic anomaly detection software for reliable, ethical detection of concealed objects.  ...  rate of ajous scanner ( .  ... 
doi:10.1117/12.2304376 fatcat:3xwyqk6y7zfivishcrcq4a2m4m

Functional retinal imaging using adaptive optics swept-source OCT at 1.6MHz [article]

Mehdi Azimipour, Justin V. Migacz, Robert J. Zawadzki, John S. Werner, Ravi S. Jonnal
2018 bioRxiv   pre-print
The OCT subsystem consisted of a raster-scanning Fourier-domain mode-locked laser that acquires A-scans at 1.64MHz with a center wavelength of 1063nm, and an AO subsystem providing diffraction-limited  ...  In this work, we describe an adaptive optics (AO) optical coherence tomography (OCT) system designed to measure functional responses of single cones to visible stimuli.  ...  The authors gratefully acknowledge the assistance of Susan Garcia.  ... 
doi:10.1101/420240 fatcat:i5zqlbfy4vd5fbxazxz3ngs6yu

Perspectives in Wireless Radio Frequency Coil Development for Magnetic Resonance Imaging

Lena Nohava, Jean-Christophe Ginefri, Georges Willoquet, Elmar Laistler, Roberta Frass-Kriegl
2020 Frontiers in Physics  
For wireless high-speed MR data transmission, 60 GHz WiGig and optical wireless communication appear to be suitable strategies; however, on-coil functionality during MRI scans remains to be verified.  ...  Besides ongoing improvement of all three subsystems, innovations are specifically required regarding wireless technologies, MR compatibility, and wireless power supply.  ...  of the optical fibers.  ... 
doi:10.3389/fphy.2020.00011 fatcat:f3ilbbiisbaehbddvqzdledpju

Spatial Distortion Assessments of a Low-Cost Laboratory and Field Hyperspectral Imaging System

Andrija Krtalić, Vanja Miljković, Dubravko Gajski, Ivan Racetin
2019 Sensors  
The imaging spectrometer system consists of an ImSpector V9 hyperspectral pushbroom scanner, PixelFly high performance digital CCD camera, and a subsystem for navigation, position determination and orientation  ...  part of the spectrum, and approached Nyquist's theory of digitalization.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s19194267 fatcat:3ojyq2ekp5fejayv7oykxjqx3i

Deliverable 2.2: Process limits fine cutting of metal

Enda McCague, Noémie Dury
2019 Zenodo  
This document provides an overview of the prerequisite studies and experimentation carried out on femtosecond processing of metals in anticipation of the arrival of the >150W (and up to 200W) system to  ...  As steel is processed at much higher galvo-scanner marking speeds (approx. 500 mm/s) the available pulse to pulse overlap distances with the current set up are larger (approx. 5 μm).  ...  Steel of a thickness of 0.2mm is selected in line with the KPI set out in D1.3 (Prototypes & progress validation) The task here is to characterize the effect the various laser and scanner parameters have  ... 
doi:10.5281/zenodo.2545607 fatcat:n2m7qsfumvbtxipeda2scg4fgy
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