Thematische Bibliographien / Photo merging

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Auswahl der wissenschaftlichen Literatur zum Thema „Photo merging“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Photo merging"

Hayat, Zain, Nizar Bchellaoui, Claire Deo, Rémi Métivier, Nicolas Bogliotti, Juan Xie, Malcolm Buckle und Abdel I. El Abed. „Fast Active Merging of Microdroplets in Microfluidic Chambers Driven by Photo-Isomerisation of Azobenzene Based Surfactants“. Biosensors 9, Nr. 4 (01.11.2019): 129. http://dx.doi.org/10.3390/bios9040129.

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In this work, we report on the development of a newly synthesized photoactive reversible azobenzene derived surfactant polymer, which enables active and fast control of the merging of microdroplets in microfluidic chambers, driven by a pulsed UV laser optical stimulus and the well known cis-trans photo-isomerisation of azobenzene groups. We show for the first time that merging of microdroplets can be achieved optically based on a photo-isomerization process with a high spatio-temporal resolution. Our results show that the physical process lying behind the merging of microdroplets is not driven by a change in surface activity of the droplet stabilizing surfactant under UV illumination (as originally expected), and they suggest an original mechanism for the merging of droplets based on the well-known opto-mechanical motion of azobenzene molecules triggered by light irradiation.

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Hernández, José G. „Mechanochemical borylation of aryldiazonium salts; merging light and ball milling“. Beilstein Journal of Organic Chemistry 13 (26.07.2017): 1463–69. http://dx.doi.org/10.3762/bjoc.13.144.

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Merging of photo- and mechanochemical activation permitted studying the role of eosin Y in the borylation of aryldiazonium salts in a ball mill. Simultaneous neat grinding/irradiation of the reactants and the photocatalyst led to the formation of boronates in a molten state. On the other hand, the catalyst-free liquid-assisted grinding/irradiation reaction also led to product formation, featuring a direct photolysis pathway facilitated by substrate–solvent charge-transfer complex formation.

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Kumar, Prashant, und Ram Krishan Sharma. „On merging of resonant periodic orbits 4:3; 3:2 and 2:1 in Sun-Jupiter photo gravitational restricted three-body problem“. International Journal of Advanced Astronomy 7, Nr. 1 (11.05.2019): 17. http://dx.doi.org/10.14419/ijaa.v7i1.17346.

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We explore the merging of resonant periodic orbits in the frame work of planar circular restricted three body problem with the help of Poincaré surface of section. We have studied the effect of solar radiation pressure on 4:3, 3:2 and 2:1 periodic orbits. It is found that radiation pressure helps in merging these orbits (4:3 and 3.2 into 1:1 resonance and 2:1 into 1:1 resonance). At the time of merging these orbits become near-circular. The period and size of these orbits reduce with the increase in radiation pressure.

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Gittings, John. „Assignment Shanghai: Photographs on the Eve of Revolution. By Jack Birns, edited by Carolyn Wakeman and Ken Light. [Berkeley: University of California Press, 2003. 144 pp. $34.95; £22.95. ISBN 0-520-23990-3.]“. China Quarterly 178 (Juni 2004): 527–29. http://dx.doi.org/10.1017/s0305741004340294.

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The image of a desperate Shanghai on the eve of Liberation – memorably conveyed in Henri Cartier-Bresson's picture of a crowd queuing for gold outside a bank – is amplified by this fine volume of photos from Jack Birns, then on assignment for Life magazine. Many of his China negatives, which include some taken on side trips to cover the defence of Mukden and the battle of Xuzhou, were unused and lay in the TimeLife archives for half a century before being disinterred.Life, as Orville Schell notes in his foreword, was the vehicle for some of the best photo-journalism of the mid-2000s, merging “a gritty current-affairs realism with a keen eye and fine sense of composition.” Yet the picture of Kuomintang brutality, muddle and corruption was often too gritty for Life's publisher Henry R. Luce who over the years had placed Chiang Kai-shek seven times on the cover.

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Sinibaldi, Arianna, Valeria Nori, Andrea Baschieri, Francesco Fini, Antonio Arcadi und Armando Carlone. „Organocatalysis and Beyond: Activating Reactions with Two Catalytic Species“. Catalysts 9, Nr. 11 (06.11.2019): 928. http://dx.doi.org/10.3390/catal9110928.

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Since the beginning of the millennium, organocatalysis has been gaining a predominant role in asymmetric synthesis and it is, nowadays, a foundation of catalysis. Synergistic catalysis, combining two or more different catalytic cycles acting in concert, exploits the vast knowledge acquired in organocatalysis and other fields to perform reactions that would be otherwise impossible. Merging organocatalysis with photo-, metallo- and organocatalysis itself, researchers have ingeniously devised a range of activations. This feature review, focusing on selected synergistic catalytic approaches, aims to provide a flavor of the creativity and innovation in the area, showing ground-breaking examples of organocatalysts, such as proline derivatives, hydrogen bond-mediated, Cinchona alkaloids or phosphoric acids catalysts, which work cooperatively with different catalytic partners.

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Chen, Minjun, Guido Bolognesi und Goran T. Vladisavljević. „Crosslinking Strategies for the Microfluidic Production of Microgels“. Molecules 26, Nr. 12 (20.06.2021): 3752. http://dx.doi.org/10.3390/molecules26123752.

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This article provides a systematic review of the crosslinking strategies used to produce microgel particles in microfluidic chips. Various ionic crosslinking methods for the gelation of charged polymers are discussed, including external gelation via crosslinkers dissolved or dispersed in the oil phase; internal gelation methods using crosslinkers added to the dispersed phase in their non-active forms, such as chelating agents, photo-acid generators, sparingly soluble or slowly hydrolyzing compounds, and methods involving competitive ligand exchange; rapid mixing of polymer and crosslinking streams; and merging polymer and crosslinker droplets. Covalent crosslinking methods using enzymatic oxidation of modified biopolymers, photo-polymerization of crosslinkable monomers or polymers, and thiol-ene “click” reactions are also discussed, as well as methods based on the sol−gel transitions of stimuli responsive polymers triggered by pH or temperature change. In addition to homogeneous microgel particles, the production of structurally heterogeneous particles such as composite hydrogel particles entrapping droplet interface bilayers, core−shell particles, organoids, and Janus particles are also discussed. Microfluidics offers the ability to precisely tune the chemical composition, size, shape, surface morphology, and internal structure of microgels by bringing multiple fluid streams in contact in a highly controlled fashion using versatile channel geometries and flow configurations, and allowing for controlled crosslinking.

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Narayanan, Nripasree, und N. K. Deepak. „Praseodymium – A Competent Dopant for Luminescent Downshifting and Photocatalysis in ZnO Thin Films“. Zeitschrift für Naturforschung A 73, Nr. 5 (24.05.2018): 441–52. http://dx.doi.org/10.1515/zna-2017-0430.

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AbstractHighly transparent and conducting Zinc oxide (ZnO) thin films doped with Praseodymium (Pr) were deposited on glass substrates by using the spray pyrolysis method. The X-ray diffraction (XRD) analysis revealed the polycrystallinity of the deposited films with a hexagonal wurtzite structure, whereas the energy-dispersive X-ray spectroscopy (EDX) analysis confirmed the incorporation of Pr in the films. The optical energy gap decreased by Pr doping due to the merging of the conduction band with the impurity bands formed within the forbidden gap. The room temperature photoluminescence spectra of the Pr-doped film showed enhancement of visible emission, suggesting efficient luminescent downshifting. The photocatalytic activity of the Pr-doped films is higher than that of undoped films due to the effective suppression of the rapid recombination of the photo-generated electron-hole pairs. The impurity levels formed within the forbidden gap act as efficient luminescent centers and electron traps, which lead to luminescent downshifting and enhanced photocatalytic activity.

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Murtagh, Fionn. „Hierarchical Matching and Regression with Application to Photometric Redshift Estimation“. Proceedings of the International Astronomical Union 12, S325 (Oktober 2016): 145–55. http://dx.doi.org/10.1017/s1743921317001569.

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AbstractThis work emphasizes that heterogeneity, diversity, discontinuity, and discreteness in data is to be exploited in classification and regression problems. A global a priori model may not be desirable. For data analytics in cosmology, this is motivated by the variety of cosmological objects such as elliptical, spiral, active, and merging galaxies at a wide range of redshifts. Our aim is matching and similarity-based analytics that takes account of discrete relationships in the data. The information structure of the data is represented by a hierarchy or tree where the branch structure, rather than just the proximity, is important. The representation is related to p-adic number theory. The clustering or binning of the data values, related to the precision of the measurements, has a central role in this methodology. If used for regression, our approach is a method of cluster-wise regression, generalizing nearest neighbour regression. Both to exemplify this analytics approach, and to demonstrate computational benefits, we address the well-known photometric redshift or ‘photo-z’ problem, seeking to match Sloan Digital Sky Survey (SDSS) spectroscopic and photometric redshifts.

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Ramos, M. M., und F. Remondino. „Data fusion in Cultural Heritage – A Review“. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-5/W7 (13.08.2015): 359–63. http://dx.doi.org/10.5194/isprsarchives-xl-5-w7-359-2015.

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Geometric documentation is one of the most important task of the Cultural Heritage (CH) conservation and management policies. 3D documentation, prior to any conservation and restoration works, is considered a basic pre-requisite for preserving, understanding, communicating and valorizing CH sites and objects (London Charter, 2009; Sevilla Principles, 2011). <br><br> 3D models have become the usual way of digitally preserving, communicating, explaining and disseminat ing cultural knowledge, as they have the capability of reproducing ancient states and behaviors. Using photo-realistic and accurate 3D models, the current conservation state can be shown and preserve for future generations. But despite the large request of 3D models in the CH field, there is no 3D documentation method which can properly satisfy all the areas with their requirements, therefore a fusion methodology (of data and sensors) is normally required and performed. The paper analyzes the fusion concept and levels as well as some merging approaches so far presented in the research community. While the paper will be necessarily incomplete due to space limitations, it will hopefully give an understanding on the actual methods of data fusion and clarify some open research issues.

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Blanco-Pons, Silvia, Berta Carrión-Ruiz, Michelle Duong, Joshua Chartrand, Stephen Fai und José Luis Lerma. „Augmented Reality Markerless Multi-Image Outdoor Tracking System for the Historical Buildings on Parliament Hill“. Sustainability 11, Nr. 16 (07.08.2019): 4268. http://dx.doi.org/10.3390/su11164268.

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Augmented Reality (AR) applications have experienced extraordinary growth recently, evolving into a well-established method for the dissemination and communication of content related to cultural heritage—including education. AR applications have been used in museums and gallery exhibitions and virtual reconstructions of historic interiors. However, the circumstances of an outdoor environment can be problematic. This paper presents a methodology to develop immersive AR applications based on the recognition of outdoor buildings. To demonstrate this methodology, a case study focused on the Parliament Buildings National Historic Site in Ottawa, Canada has been conducted. The site is currently undergoing a multiyear rehabilitation program that will make access to parts of this national monument inaccessible to the public. AR experiences, including simulated photo merging of historic and present content, are proposed as one tool that can enrich the Parliament Hill visit during the rehabilitation. Outdoor AR experiences are limited by factors, such as variable lighting (and shadows) conditions, caused by changes in the environment (objects height and orientation, obstructions, occlusions), the weather, and the time of day. This paper proposes a workflow to solve some of these issues from a multi-image tracking approach.

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Mehr Quellen

Dissertationen zum Thema "Photo merging"

Masaryk, Adam. „Pořizování vysoce kvalitních snímků rovinných povrchů chytrým telefonem“. Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-445564.

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The aim of this thesis is to create a mobile application for Android, which allows users to create high-quality photos of planar objects. User can create multiple photographs of a selected planar object. These photographs are then aligned and combined into one final image. Various shortcomings that can be present in the photographs are filtered.

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Bücher zum Thema "Photo merging"

Croken, Ryan. Obama bin Laden [sic]. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252038860.003.0009.

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This chapter examines the cultural “confusion” that existed in the United States between Osama bin Laden and Barack Obama. It uses the cultural slippages (Obama/Osama), conspiratorial elisions (Obama is Osama), and religious assumptions (Obama, like Osama, is Muslim) that surround Osama and Obama as points for analyzing racialized dynamics that underlie narratives of U.S. exceptionalism, military power, and global dominance. It identifies some of the myriad streams through which popular culture effects its messages: T-shirts, web tools (photo morphing), memes, hip-hop, tweets, YouTube videos, and the like. Attending to these media formats is an essential component of examining sense-making across the complexities of U.S. cultures. The chapter argues that the “confusion” between Osama and Obama is more than just difficulty with name pronunciation, lack of familiarity with Islam, or merging of nonwhite skin color, but is instead a complex negotiation of racial intersections with national narratives.

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Buchteile zum Thema "Photo merging"

Colopy, Cheryl. „The Koshi’s Revenge“. In Dirty, Sacred Rivers. Oxford University Press, 2012. http://dx.doi.org/10.1093/oso/9780199845019.003.0018.

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The Koshi spoke during the monsoon of 2008. She opened a new path, just as Dinesh Mishra predicted. The river breached an apparently ill-constructed and certainly ill-maintained embankment. A photo taken as the flood began shows the ridge of sand dissolving as water poured through a widening gap in the embankment and flowed southeast. In both Nepal and Bihar, villages and farms that had not seen a flood for the past half century were devastated. The embankments on the Koshi had already breached seven times at various spots downriver. This time the entire river below the Siwalik range in Nepal, where the land flattens, had essentially jumped out of its straitjacket and returned to one of its old channels—one it had flowed down two centuries ago. In Nepal the Koshi River is known as the Saptakoshi, or “seven Koshis,” because seven Himalayan rivers merge to create it. The Tamur flows down from Kanchenjunga in eastern Nepal near its border with Bhutan and India; the Arun comes down from Tibet. Out of the Khumbu comes the Dudh Koshi, the milky blue river that entranced me on the way up to Gokyo. The Dudh Koshi joins the Sun Koshi, which is also fed by the Tama Koshi, which in turn receives water from the Rolwaling Khola and Tsho Rolpa, the threatening glacial lake I visited during the monsoon of 2006. From farther west, toward Kathmandu, come the Likhu and the Indrawati. The latter receives the as yet undiverted waters of the Melamchi Khola. These seven tributaries of the Saptakoshi drain more than a third of the Nepal Himalaya, the wettest and highest of the great range, which includes the Khumbu and Ngozumpa glaciers. The Koshi drains almost thirty thousand square miles. It is Nepal’s largest river and one of the largest tributaries of the Ganga. Less than ten miles above the plains, three of these great rivers come together in a final merging: the Sun Koshi from the west, the Arun from the north, the Tamur from the east.

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Konferenzberichte zum Thema "Photo merging"

Lee, Jaehoon, Myungjin Cho, Kotaro Inoue und Min-chul Lee. „Three-Dimensional Photon Counting Integral Imaging Reconstruction using Merging Reconstruction Method“. In 2020 International Conference on Artificial Intelligence in Information and Communication (ICAIIC). IEEE, 2020. http://dx.doi.org/10.1109/icaiic48513.2020.9065055.

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Ershov, Sergey, Alexey Voloboy, Dmitriy Zhdanov und Andrey Zhdanov. „Calculation of MIS Weights for Bidirectional Path Tracing with Photon Maps“. In International Conference "Computing for Physics and Technology - CPT2020". Bryansk State Technical University, 2020. http://dx.doi.org/10.30987/conferencearticle_5fce2770c2a855.82436756.

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A widely used method for noise reduction in Monte-Carlo ray tracing is combing different means of sampling, known as multiple importance sampling (MIS). For bi-directional Monte-Carlo ray tracing with photon maps (BDPM), the join paths are obtained by merging camera and light sub-paths, and since several light paths are checked again the same camera path, and vice versa, the join paths obtained are not statistically independent. Thus the noise in this method obeys laws different from those in simple classic Monte-Carlo with independent samples so the weights that minimize that noise must also be calculated differently. This paper drives that weights for the simplest case when we mix contribution from only two vertices of camera ray. It shows that the weights obey an integral equation which is qualitatively different from the well-known MIS formulae for uncorrelated samples. Besides that, even if forget the integral operator, the weights depend on the integration sphere radius and the number of light rays used. The integral equation is solved analytically in a closed form and it is demonstrated how to perform the necessary calculations in BDPM.

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Ershov, Sergey, Alexey Voloboy, Dmitriy Zhdanov, Andrey Zhdanov und Vladimir Frolov. „Direct calculation of the optimal weight for MIS“. In International Conference "Computing for Physics and Technology - CPT2020". Bryansk State Technical University, 2020. http://dx.doi.org/10.30987/conferencearticle_5fce2770d0d3a2.87759820.

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A Monte-Carlo ray tracing is nowadays standard approach for lighting simulation and generation of realistic images. A widely used method for noise reduction in Monte-Carlo ray tracing is combing different means of sampling, known as Multiple Importance Sampling (MIS). For bi-directional Monte-Carlo ray tracing with photon maps (BDPM) the join paths are obtained by merging camera and light sub-paths. Since several light paths are checked against the same camera path and vice versa, the join paths obtained are not statistically independent. Thus the noise in this method does not obey the laws which are correct in simple classic Monte-Carlo with independent samples. And, correspondingly, the MIS weights that minimize that noise must also be calculated differently. In this paper we calculate these weights for a simple model scene directly minimizing the noise of calculation. This is a pure direct numerical minimization that does not involve any doubtful hypothesis or approximations. We show that the weights obtained are qualitatively different from those calculated from classic “balance heuristic” for Monte-Carlo with independent samples. They depend on the scene distance, but not only on scattering properties of the surfaces and the distribution of light source emission.

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Bilsel, Osman, Ying Wu, Can Kayatekin und C. Robert Matthews. „Merging microsecond mixing and time-correlated single-photon counting: using time-resolved FRET and time-resolved anisotropy to probe early events in protein folding“. In Optics East 2007, herausgegeben von Wolfgang Becker. SPIE, 2007. http://dx.doi.org/10.1117/12.734486.

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