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Megapixel adaptive optics

Congli Wang, Qiang Fu, Xiong Dun, Wolfgang Heidrich
2018 ACM Transactions on Graphics  
to create a megapixel adaptive optics system with unprecedented capability to sense and correct large distortions.  ...  In this work, we demonstrate an adaptive optics system for regular cameras.  ...  DISCUSSION AND CONCLUSIONS In this paper, we have demonstrated an adaptive optics system that can sense and correct optical distortions with megapixel spatial resolution and a large magnitude.  ... 
doi:10.1145/3197517.3201299 fatcat:fbfefhsxencrrkmrxdkspzbqqq

Non-stationary correction of optical aberrations

Christian J. Schuler, Michael Hirsch, Stefan Harmeling, Bernhard Scholkopf
2011 2011 International Conference on Computer Vision  
We rely on a calibration step to encode the optical aberrations in a space-variant point spread function and obtain a corrected image by non-stationary deconvolution.  ...  We rely on a calibration step to encode the optical aberrations in a space-variant point spread function and obtain a corrected image by non-stationary deconvolution.  ...  However, in the case of strong distortions this would require PSFs as large as 500x500 pixels, say, and a large computational load.  ... 
doi:10.1109/iccv.2011.6126301 dblp:conf/iccv/SchulerHHS11 fatcat:yh7eiu42ovgdjmt2ull5cmawtu

Toward omnidirectional and automated imaging system for measuring oceanic whitecap coverage

Raied S. Al-Lashi
2016 Optical Society of America. Journal A: Optics, Image Science, and Vision  
The main challenges in designing a whitecap-imaging instrument are the small field of view of the camera lens, processing large numbers of images, recording data over long time periods, and deployment  ...  The instrument uses a fish-eye camera lens to image the whitecaps in wide angle of view (180°).  ...  The authors would like to thank the scientists, officers, and crews of the R/V Knorr who took part in the HiWINGS campaign for their help during deployment of foam-imaging instruments in the North Atlantic  ... 
doi:10.1364/josaa.33.001589 pmid:27505657 fatcat:qkuxt3cs3fefjddef3fu2l6v2e

Toward omnidirectional and automated imaging system for measuring oceanic whitecap coverage

Raied S. Al-Lashi, Merlin Webster, Steve R. Gunn, Helen Czerski
2018 Optical Society of America. Journal A: Optics, Image Science, and Vision  
The main challenges in designing a whitecap-imaging instrument are the small field of view of the camera lens, processing large numbers of images, recording data over long time periods, and deployment  ...  The instrument uses a fish-eye camera lens to image the whitecaps in wide angle of view (180°).  ...  The authors would like to thank the scientists, officers, and crews of the R/V Knorr who took part in the HiWINGS campaign for their help during deployment of foam-imaging instruments in the North Atlantic  ... 
doi:10.1364/josaa.35.000515 pmid:29603975 fatcat:3ookpxij6nfrdigta6ehsxezti

An optical Fourier transform coprocessor with direct phase determination

Alexander J. Macfaden, George S. D. Gordon, Timothy D. Wilkinson
2017 Scientific Reports  
The Fourier transform is a ubiquitous mathematical operation which arises naturally in optics.  ...  information processing and computational physics.  ...  The requirements on optical design in order to produce a well-corrected optical relay and a distortion-free optical Fourier transform are within the realms of conventional optical design 21 .  ... 
doi:10.1038/s41598-017-13733-1 pmid:29057903 pmcid:PMC5651838 fatcat:4cngu4df5fh57isjhcefi5sh3u

Overlapped Fourier coding for optical aberration removal

Roarke Horstmeyer, Xiaoze Ou, Jaebum Chung, Guoan Zheng, Changhuei Yang
2014 Optics Express  
The OFC algorithm then fuses these low-resolution images into a full-resolution estimate of the complex optical field incident upon the detector.  ...  The result is an imaging system that can computationally overcome its optical imperfections to offer enhanced resolution, at the expense of taking multiple snapshots over time.  ...  In a broader sense, this situates the OFC scheme close to the realm of adaptive optics, which utilizes correction schemes targeting and removing optical distortions that can change with each acquired image  ... 
doi:10.1364/oe.22.024062 pmid:25321982 pmcid:PMC4247187 fatcat:iweh2ajmtvdnpgbonfje3p2zxm

Review of bio-optical imaging systems with a high space-bandwidth product

Jongchan Park, David J. Brady, Guoan Zheng, Lei Tian, Liang Gao
2021 Advanced Photonics  
The problem originates from constituent refractive optics-the larger the aperture, the more challenging the correction of lens aberrations.  ...  Since a gigapixel-scale far exceeds the capacity of current optical imagers, compromises must be made to obtain either a low spatial resolution or a narrow field-of-view (FOV).  ...  the computational correction of spatially varying aberrations of an objective lens (2×∕0.08 NA, Olympus) in a large FOV (13 mm in diameter).  ... 
doi:10.1117/1.ap.3.4.044001 pmid:35178513 pmcid:PMC8849623 fatcat:vfjbb2ru7zaytf4s5epzcym6nm

Snapshot 3D optical coherence tomography system using image mapping spectrometry

Thuc-Uyen Nguyen, Mark C Pierce, Laura Higgins, Tomasz S Tkaczyk
2013 Optics Express  
A snapshot 3-Dimensional Optical Coherence Tomography system was developed using Image Mapping Spectrometry.  ...  Axial resolution of 16.0 μm can also be achieved in this proof-of-concept system.  ...  Currently for our 16 Megapixel camera in this proof-of-concept system, It typically takes 8 s to transfer all acquired data to the computer via a USB port, and 9 s to generate a 3D (x,y,z) volume using  ... 
doi:10.1364/oe.21.013758 pmid:23736629 pmcid:PMC3686468 fatcat:bxwb6g7xe5g2dgadbbc57zr7py

Asynchronous transfer of individually addressable optical channels through a multimode fiber using phase conjugation [article]

Jueurgen W. Czarske, Daniel Haufe, Nektarios Koukourakis, Lars Buettner
2016 arXiv   pre-print
Our findings pave the way towards individual signal transfer inside strongly scattering media.  ...  A major hurdle for imaging through multimode fibers is the occurring scrambling, resulting in a randomization of light.  ...  Although the speckle pattern looks random, speckles are created in a deterministic way, meaning that the occurring distortions are systematic and can be corrected.  ... 
arXiv:1603.04618v2 fatcat:bfm5rngfpjawbbotqqr6wktibu

Close-up imaging using microcamera arrays for focal plane synthesis

Daniel L. Marks
2011 Optical Engineering: The Journal of SPIE  
C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).  ...  By imaging using microcamera arrays onto many separate sensors rather than a single large sensor, the subfields captured by individual sensors may be combined using image processing into a large synthetic  ...  components that improve alignment tolerances, and 3. micro-optics may include field correction, which reduces requirements for objective optical elements, 3 enables local adaptive correction for distortion  ... 
doi:10.1117/1.3554389 fatcat:kltpswl5zbefddwiogilfybrde

Smartphone imaging technology and its applications

Vladan Blahnik, Oliver Schindelbeck
2021 Advanced Optical Technologies  
After a brief assessment of the SPC market and supply chain, the camera system and optical image formation is described in more detail.  ...  Optical image stabilization has greatly improved image performance, enabled as it is by built-in sensors such as a gyroscope and accelerometer.  ...  In many camera modules this distortion is not corrected by software, although there are apps available that can correct this distortion.  ... 
doi:10.1515/aot-2021-0023 fatcat:sr4hssk7zbbuhhj532mqngh424

Design, fabrication and test of miniature plastic panomorph lenses with 180° field of view

Simon Thibault, Jocelyn Parent, Hu Zhang, Patrice Roulet, Mariana Figueiro, Scott Lerner, Julius Muschaweck, John Rogers
2014 International Optical Design Conference 2014  
We present two miniature all plastic megapixel panomorph lenses for consumer electronics (total track length (TTL) of 6.56 mm) and mobile devices (TTL of 3.80 mm) showing the unique challenges from specification  ...  The industry of consumer electronics lenses and camera modules adapted to these specificities over the past 10 years by pushing the limits of the technology.  ...  The targeted distortion of this lens is designed to increase the number of pixels/degree toward the edge of the FoV as shown in figure 3 .  ... 
doi:10.1117/12.2074334 fatcat:ww3frdw5crdobiwk6rizelbeta

In-flight aeroelastic measurement technique development

Alpheus W. Burner, William A. Lokos, Danny A. Barrows, Patrick V. Farrell, Fu-Pen Chiang, Carolyn R. Mercer, Gongxin Shen
2003 Optical Diagnostics for Fluids, Solids, and Combustion II  
The method is adapted from a proven technique used in wind tunnel testing to measure model deformation, often referred to as the videogrammetric model deformation (or VMD) technique.  ...  The requirements for in-flight measurements are compared and contrasted with those for wind tunnel testing.  ...  In equations (1) below, the image coordinates x, y have been corrected for optical lens distortion 10 or the distortion is negligible.  ... 
doi:10.1117/12.504157 fatcat:62pzmtkbkjbgviorok4ndobhne

Quantifying Floating Plastic Debris at Sea Using Vessel-Based Optical Data and Artificial Intelligence

Robin de Vries, Matthias Egger, Thomas Mani, Laurent Lebreton
2021 Remote Sensing  
Despite recent advances in remote sensing of large accumulations of floating plastic debris, mainly in coastal regions, the quantification of individual macroplastic objects (>50 cm) remains challenging  ...  Macroplastic numerical concentrations are estimated by combining the object detection solution with bulk processing of the optical data.  ...  Each image of 12 megapixels (MP, 4000 by 3000 pixels) was corrected for lens distortion by the internal camera software using the linear field-of-view (FOV) setting.  ... 
doi:10.3390/rs13173401 fatcat:n5myyzvxpba5dlagickbydxfxy

A Novel High-Resolution Optical Instrument for Imaging Oceanic Bubbles

Raied Sarmad Al-Lashi, Steve R. Gunn, Eric G. Webb, Helen Czerski
2018 IEEE Journal of Oceanic Engineering  
It contains a high-resolution machine vision camera, strobe flash unit to create a light sheet, and single board computer to control system operation.  ...  The instrument was successfully deployed in 2013 as part of the HiWINGS campaign in the North Atlantic Ocean.  ...  ACKNOWLEDGMENT The authors would like to thank the officers and crew of R/V Knorr taking part in the HiWINGS campaign for their help during deployment of the bubble imaging instrument in the North Atlantic  ... 
doi:10.1109/joe.2017.2660099 fatcat:tqehslmqajdnxj2junpkd2az3m
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