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Megapixel adaptive optics
2018
ACM Transactions on Graphics
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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
2011
2011 International Conference on Computer Vision
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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
2016
Optical Society of America. Journal A: Optics, Image Science, and Vision
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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
2018
Optical Society of America. Journal A: Optics, Image Science, and Vision
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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
2017
Scientific Reports
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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
2014
Optics Express
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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
2021
Advanced Photonics
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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
2013
Optics Express
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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]
2016
arXiv
pre-print
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2016 pre-print arXiv:1603.04618v1 fatcat:qwotrbhecfh7dcjcmkmxnobcve
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
2011
Optical Engineering: The Journal of SPIE
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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
2021
Advanced Optical Technologies
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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
2014
International Optical Design Conference 2014
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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
2003
Optical Diagnostics for Fluids, Solids, and Combustion II
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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
2021
Remote Sensing
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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
2018
IEEE Journal of Oceanic Engineering
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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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