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Direct PSF estimation using a random noise target

Johannes Brauers, Claude Seiler, Til Aach, Francisco Imai, Nitin Sampat, Feng Xiao
<span title="2010-01-17">2010</span> <i title="SPIE"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/t7lqzqd4xvasjb7q276aidbqty" style="color: black;">Digital Photography VI</a> </i> &nbsp;
To estimate such PSFs we have developed a new measurement method utilizing a random noise test target with markers: After acquisition of this target, a synthetic prototype of the test target is geometrically  ...  This allows us to estimate the PSF by direct comparison between prototype and image.  ...  Our random noise calibration target in three different versions: The PSFs are estimated utilizing the synthetic prototype and the acquired image and are used to deconvolve the acquired image.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1117/12.837591">doi:10.1117/12.837591</a> <a target="_blank" rel="external noopener" href="https://dblp.org/rec/conf/dphoto/BrauersSA10.html">dblp:conf/dphoto/BrauersSA10</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/pnozmasurreinpa7vklkcrxjpe">fatcat:pnozmasurreinpa7vklkcrxjpe</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20160826015049/http://www.imaging.org/site/PDFS/Reporter/Articles/Rep25_2_EI2010_BRAUERS.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/f2/e2/f2e234cb01f5d84e8800f667af1e7b8b72a7669d.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1117/12.837591"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

Estimating Locations of Quantum-Dot-Encoded Microparticles From Ultra-High Density 3-D Microarrays

P. Sarder, A. Nehorai
<span title="">2008</span> <i title="Institute of Electrical and Electronics Engineers (IEEE)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/377jjr6oajbnfosig277u4penq" style="color: black;">IEEE Transactions on Nanobioscience</a> </i> &nbsp;
We use a 3-D Gaussian point-spread-function (PSF) model to represent the blurring of the widefield microscope system.  ...  A potential application of the proposed microarray imaging is assay analysis of gene, protein, antigen, and antibody targets. This imaging is performed using a wide-field fluorescence microscope.  ...  ACKNOWLEDGMENT We are grateful to Professor David Kelso of Northwestern University for providing us with the real-data images for this research.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1109/tnb.2008.2011861">doi:10.1109/tnb.2008.2011861</a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pubmed/19203872">pmid:19203872</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/eh3zojjzvjg6lhs4wu5qkm5v6a">fatcat:eh3zojjzvjg6lhs4wu5qkm5v6a</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20100607214853/http://userfs.cec.wustl.edu/~ps6/journal_papers/J3Deconvolution_3DMicroarray.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/5f/8e/5f8e2b5ca2e6c75672363f9507ca7c69f1d1d2e9.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1109/tnb.2008.2011861"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> ieee.com </button> </a>

Improving PSF calibration in confocal microscopic imaging—estimating and exploiting bilateral symmetry

Nicolai Bissantz, Hajo Holzmann, Mirosław Pawlak
<span title="">2010</span> <i title="Institute of Mathematical Statistics"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/3ug7ktuisbglri55pm3ycqp46u" style="color: black;">Annals of Applied Statistics</a> </i> &nbsp;
In an extensive simulation study, we show that using a symmetrized version of the observed PSF significantly improves the subsequent reconstruction process of the target image.  ...  Here, f and τ_βf are estimated using truncated radial series of the Zernike type. The inherent symmetry properties of the Zernike functions result in a particularly simple estimation procedure for β.  ...  Here we provide the technical proofs for our results in the paper "Improving PSF calibration in confocal microscopic imaging-estimating and exploiting bilateral symmetry."  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1214/10-aoas343">doi:10.1214/10-aoas343</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/ztpzz3qvkzf25lw2ku4354w574">fatcat:ztpzz3qvkzf25lw2ku4354w574</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20170713152922/http://projecteuclid.org/download/pdfview_1/euclid.aoas/1294167802" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/d2/92/d292156d2d085fd0e66cc69359d0ac73397ec7fd.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1214/10-aoas343"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> Publisher / doi.org </button> </a>

Camera intrinsic blur kernel estimation: A reliable framework

Ali Mosleh, Paul Green, Emmanuel Onzon, Isabelle Begin, J.M. Pierre Langlois
<span title="">2015</span> <i title="IEEE"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/ilwxppn4d5hizekyd3ndvy2mii" style="color: black;">2015 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)</a> </i> &nbsp;
As a result of these steps and the ability to use multiple target images in this framework, we achieve a PSF estimation method robust against noise and suitable for mobile devices.  ...  This alignment is used to generate a sharp correspondence of a target pattern captured by the camera.  ...  The PSF estimation problem is solved using least squares minimization and thresholding out negative values generated in the result. A random noise target is also used in Brauers et al.'  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1109/cvpr.2015.7299130">doi:10.1109/cvpr.2015.7299130</a> <a target="_blank" rel="external noopener" href="https://dblp.org/rec/conf/cvpr/Mosleh0OBL15.html">dblp:conf/cvpr/Mosleh0OBL15</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/kiyaloanhvetfdv42pzri2asym">fatcat:kiyaloanhvetfdv42pzri2asym</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20150906073155/http://www.cv-foundation.org/openaccess/content_cvpr_2015/papers/Mosleh_Camera_Intrinsic_Blur_2015_CVPR_paper.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/7b/b6/7bb6d255c2c955e926de0625f1e4dcf862156172.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1109/cvpr.2015.7299130"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> ieee.com </button> </a>

Measurement of the optical transfer function using a white-dot pattern presented on a liquid-crystal display

F. A. Navas-Moya, J. L. Nieves, E. M. Valero, E. Garrote
<span title="2013-04-23">2013</span> <i title="European Optical Society"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/t3fewntv7bfqpdjtnxj33675di" style="color: black;">Journal of the European Optical Society-Rapid Publications</a> </i> &nbsp;
, all frequencies and directions covered in a single capture, no additional light source needed and derivative-dependent noise avoided.  ...  We propose a novel way of providing spatial information by measuring a number of point-spread functions (PSF).  ...  Acknowledgments This research was financed by a joint agreement (reference number C-3368-00) between Tecnalia and the Business-UGR Foundation. We also thank Professors Antonio M.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.2971/jeos.2013.13029">doi:10.2971/jeos.2013.13029</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/a5yujrknqjbzjmabha7gbzbedi">fatcat:a5yujrknqjbzjmabha7gbzbedi</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20170809113102/http://www.computervisionbytecnalia.com/wp-content/uploads/2013/08/MeasurementOpticalTransfer_garrote.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/3a/83/3a83c1a08abdb067d2fa4ac6c67bf91eb7b5e998.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.2971/jeos.2013.13029"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> Publisher / doi.org </button> </a>

The fine guidance system of the PLATO mission

Denis Grießbach, Ulrike Witteck, Carsten Paproth, Zoran Sodnik, Bruno Cugny, Nikos Karafolas
<span title="2021-06-11">2021</span> <i title="SPIE"> International Conference on Space Optics — ICSO 2020 </i> &nbsp;
The shown algorithm provides a noise optimal estimation of the guide star positions which propagates to an optimal attitude estimation.  ...  Working as a star-tracker, the attitude calculation is based on guide star positions on the focal plane and their reference directions given by a star catalogue.  ...  ICSO 2020 International Conference on Space Optics Virtual Conference 30 March-2 April 2021 The better choice in terms of random noise is to use a PSF fitting algorithm.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1117/12.2599604">doi:10.1117/12.2599604</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/2ml437do2nc2dm5qfko7izztme">fatcat:2ml437do2nc2dm5qfko7izztme</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20210715153050/https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11852/118523H/The-fine-guidance-system-of-the-PLATO-mission/10.1117/12.2599604.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/22/86/228696726443db366eb06122910b568f1586e0a4.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1117/12.2599604"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

The Non-parametric Sub-pixel Local Point Spread Function Estimation Is a Well Posed Problem

Mauricio Delbracio, Pablo Musé, Andrés Almansa, Jean-Michel Morel
<span title="2011-06-09">2011</span> <i title="Springer Nature"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/hfdglwo5wbbmta6wop52fam7a4" style="color: black;">International Journal of Computer Vision</a> </i> &nbsp;
Indeed, theoretical bounds show that a near-optimal accuracy can be achieved with a calibration pattern mimicking a Bernoulli(0.5) random noise.  ...  We use an algorithm to accurately estimate the pattern position and its illumination conditions.  ...  In Brauers et al. (2010) a random noise pattern is also used, but in a completely different approach. The acquired image is registered to match the target.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/s11263-011-0460-0">doi:10.1007/s11263-011-0460-0</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/pwvfoqcby5bl7a2rbs376ufezq">fatcat:pwvfoqcby5bl7a2rbs376ufezq</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20170706031854/http://iie.fing.edu.uy/%7Epmuse/docs/papers/Delbracio_IJCV_PSF_2012.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/e0/20/e020f8ec43ae73c8ce44af43e92d9c3cba7627b9.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/s11263-011-0460-0"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> springer.com </button> </a>

Simulating Study on Observation of Space Point Target from a Shipborne Optoelectronic System

Hai-huan CHEN, Xiong WANG
<span title="2017-11-30">2017</span> <i title="DEStech Publications"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/oepoggqi3bgnbds2j2j6zruxjy" style="color: black;">DEStech Transactions on Engineering and Technology Research</a> </i> &nbsp;
Richardson-Lucy (RL) algorithm is used to study the recovering of motion-blurred image of space point target, and the point spread function (PSF) of motion-blurred image is built up employing practical  ...  The influence of noise on the deblurring effect is analyzed, and the recovering results using RL algorithm with different denoise methods are discussed.  ...  Figure 6 . 6 Recovering of multi-target image. (a) Original image, (b) PSF bases on miss distance, (c) motion-blurred image with noise, (d) recovered image.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.12783/dtetr/oect2017/16108">doi:10.12783/dtetr/oect2017/16108</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/fuwahqkk2naafpkw7awbbga56a">fatcat:fuwahqkk2naafpkw7awbbga56a</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20190429122405/http://dpi-proceedings.com/index.php/dtetr/article/download/16108/15616" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/c4/3e/c43ef00ffba79493e76f2c317f86a67c6daa17d4.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.12783/dtetr/oect2017/16108"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

Performance Analysis and Design of Position-Encoded Microsphere Arrays Using the Ziv-Zakai Bound

Xiaoxiao Xu, Pinaki Sarder, Nalinikanth Kotagiri, Samuel Achilefu, Arye Nehorai
<span title="">2013</span> <i title="Institute of Electrical and Electronics Engineers (IEEE)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/377jjr6oajbnfosig277u4penq" style="color: black;">IEEE Transactions on Nanobioscience</a> </i> &nbsp;
An imaging experiment on microspheres with protein targets verifies the optimal design parameters using the ZZB.  ...  We compute the Ziv-Zakai bound (ZZB) on the errors in estimating the unknown parameters, including the target concentrations.  ...  The noiseonly section is marked with a black dashed rectangle, and is used to estimate the background noise levels (more details in Appendix B).  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1109/tnb.2012.2230116">doi:10.1109/tnb.2012.2230116</a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pubmed/23268386">pmid:23268386</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/2ocxo6xyxneozegka5fg2wz534">fatcat:2ocxo6xyxneozegka5fg2wz534</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20170829220956/https://www.ese.wustl.edu/~nehorai/paper/Xu_ZZB_2013.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/ba/7a/ba7a582f845820f5d218520a136c59b5d0a4700c.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1109/tnb.2012.2230116"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> ieee.com </button> </a>

Statistical design of a 3D microarray with position-encoded microspheres

Pinaki Sarder, Arye Nehorai
<span title="">2009</span> <i title="IEEE"> 2009 3rd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP) </i> &nbsp;
We compute the posterior Cramér-Rao bound on the error in estimating the unknown imaging parameters and use the bound to compute the minimal distance between the microspheres, which provides a desired  ...  We illustrate our concept using a numerical example. The proposed microarray has high sensitivity, efficient packing density, and guaranteed imaging performance.  ...  The advantage of using this PSF model is that it preserves the symmetry and the asymmetry of the classical Gibbson and Lanni PSF model [10] along the focal planes and the optical direction, respectively  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1109/camsap.2009.5413312">doi:10.1109/camsap.2009.5413312</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/p3d7tlrekbgkbbxdk5pfkw5ep4">fatcat:p3d7tlrekbgkbbxdk5pfkw5ep4</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20170809112227/http://www.acsu.buffalo.edu/~pinakisa/img/pubs/Sarder_CAMSAP_2009.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/37/28/3728195f77a1dfb2f3452a2fdfa6ab81506a9b8e.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1109/camsap.2009.5413312"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> ieee.com </button> </a>

THE THIRD GRAVITATIONAL LENSING ACCURACY TESTING (GREAT3) CHALLENGE HANDBOOK

Rachel Mandelbaum, Barnaby Rowe, James Bosch, Chihway Chang, Frederic Courbin, Mandeep Gill, Mike Jarvis, Arun Kannawadi, Tomasz Kacprzak, Claire Lackner, Alexie Leauthaud, Hironao Miyatake (+19 others)
<span title="2014-04-17">2014</span> <i title="IOP Publishing"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/b6oeh4xaordn7ia3d372ngy66q" style="color: black;">Astrophysical Journal Supplement Series</a> </i> &nbsp;
To facilitate entry by people new to the field, and for use as a diagnostic tool, the simulation software for the challenge is publicly available, though the exact parameters used for the challenge are  ...  images that will be used to measure weak gravitational lensing.  ...  0 to 0.3 but random direction.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1088/0067-0049/212/1/5">doi:10.1088/0067-0049/212/1/5</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/6vrd5cb3jne4jfiqag2522prpa">fatcat:6vrd5cb3jne4jfiqag2522prpa</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20170922064619/http://dro.dur.ac.uk/13320/1/13320.pdf?DDD25+d700tmt+d303dv" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/83/16/831637ae9d3bc7114926b3af0296c5bdd6fbca43.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1088/0067-0049/212/1/5"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> iop.org </button> </a>

Characterizing the Degrading Effects of Scattering by Atmospheric Fog on the Spatial Resolution of Imaging Systems

Mohamed Hanafy, Fawzy Hassan
<span title="2015-05-01">2015</span> <i title="Egypts Presidential Specialized Council for Education and Scientific Research"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/gng3qcbmhffw5mijsnez2d6bzu" style="color: black;">International Conference on Aerospace Sciences and Aviation Technology</a> </i> &nbsp;
The PSF and radiometric calculations are then used to estimate the mean numbers of direct path and scattered photons detected by the imaging system in the visible and near infra-red (NIR) spectral bands  ...  The image spectrum signal-to-noise ratio (SNR) is then used to estimate the noise effective spatial resolution of the imaging system which emphasizes the degrading effect of fog aerosol models on the spatial  ...  We used a radiometric model for estimating the mean numbers of direct and scattered photons detected by an imaging system from an extended target, for a horizontal near-ground imaging scenario, upon propagation  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.21608/asat.2015.23010">doi:10.21608/asat.2015.23010</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/55aw22bazjakzhkgfw3qaayk54">fatcat:55aw22bazjakzhkgfw3qaayk54</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200320064838/https://asat.journals.ekb.eg/article_23010_8231542a8bd9159c1713ee0e90d7bc2f.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/77/f2/77f25b122e312813ee8eec96d7c85544321538df.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.21608/asat.2015.23010"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

CT scout z-resolution improvement with image restoration methods

Yufeng Zheng, Xiaohui Cui, Mark P. Wachowiak, Adel S. Elmaghraby, Milan Sonka, J. Michael Fitzpatrick
<span title="2003-05-16">2003</span> <i title="SPIE"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/ha25cznnjncxtjoykhsg6fz5ly" style="color: black;">Medical Imaging 2003: Image Processing</a> </i> &nbsp;
However, many CT scout images cannot be used diagnostically due to their poor resolution, particularly in the direction of table movement.  ...  The concept of equivalent target point spread function is introduced, which makes the restoration process steerable.  ...  Of course, other functions can also be used as a target PSF.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1117/12.480308">doi:10.1117/12.480308</a> <a target="_blank" rel="external noopener" href="https://dblp.org/rec/conf/miip/ZhengCWE03.html">dblp:conf/miip/ZhengCWE03</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/sswpaufas5fqnoajlx5oj7mlay">fatcat:sswpaufas5fqnoajlx5oj7mlay</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20100608215044/http://aser.ornl.gov/cui/personal/document/CT.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/c6/ef/c6ef8c419429ca21b0e0b02cb2f813575d341e87.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1117/12.480308"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

Characterizing the Performance of the NIRC2 Vortex Coronagraph at W. M. Keck Observatory

W. Jerry Xuan, Dimitri Mawet, Henry Ngo, Garreth Ruane, Vanessa P. Bailey, Élodie Choquet, Olivier Absil, Carlos Alvarez, Marta Bryan, Therese Cook, Bruno Femenía Castellá, Carlos Gomez Gonzalez (+6 others)
<span title="2018-09-14">2018</span> <i title="American Astronomical Society"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/24u4x3hwkvb5befybykrphkbti" style="color: black;">Astronomical Journal</a> </i> &nbsp;
Finally, we use random forest models to estimate ADI and RDI post-processed detection limits a priori. These models, which we provide publicly on a website, explain 70 RDI detection limits.  ...  We systematically process images from 359 observations of 304 unique stars to subtract residual starlight (i.e., the coronagraphic point spread function) of the target star using two methods: angular differential  ...  Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA).  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.3847/1538-3881/aadae6">doi:10.3847/1538-3881/aadae6</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/sjteh2pixvemjacrqv6gzdz4nm">fatcat:sjteh2pixvemjacrqv6gzdz4nm</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20190427070521/https://orbi.uliege.be/bitstream/2268/232396/1/Xuan18_NIRC2_vortex_performance_characterization.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/f7/1e/f71e58eb4fab68d7e1d58df53accc8a2a83fca0f.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.3847/1538-3881/aadae6"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

Confidence Level and Sensitivity Limits in High‐Contrast Imaging

Christian Marois, David Lafreniere, Bruce Macintosh, Rene Doyon
<span title="2008-01-20">2008</span> <i title="IOP Publishing"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/otgg2yqymve23nrsflax26msgm" style="color: black;">Astrophysical Journal</a> </i> &nbsp;
Using numerical simulations, it is shown that in the presence of speckles noise, a detection threshold up to three times higher is required to obtain a confidence level equivalent to that at 5sigma for  ...  A power-law is finally derived to predict the 1-3*10^-7 confidence level detection threshold when averaging a partially correlated non-Gaussian noise.  ...  residual image can be used to estimate the noise distribution.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1086/523839">doi:10.1086/523839</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/tnfihhdnobd23eiziooan5hhdy">fatcat:tnfihhdnobd23eiziooan5hhdy</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20180719005810/https://digital.library.unt.edu/ark:/67531/metadc902136/m2/1/high_res_d/941394.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/08/5b/085b97c827b9570a3c969a923f784066b23e64ba.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1086/523839"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> iop.org </button> </a>
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