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Dissertations / Theses on the topic 'Snapshot images'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Gryspeerdt, Edward, Tom Goren, and Tristan W. P. Smith. "Observing the timescales of aerosol–cloud interactions in snapshot satellite images." Copernicus Publications, 2021. https://ul.qucosa.de/id/qucosa%3A74863.

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The response of cloud processes to an aerosol perturbation is one of the largest uncertainties in the anthropogenic forcing of the climate. It occurs at a variety of timescales, from the near-instantaneous Twomey effect to the longer timescales required for cloud adjustments. Understanding the temporal evolution of cloud properties following an aerosol perturbation is necessary to interpret the results of so-called “natural experiments” from a known aerosol source such as a ship or industrial site. This work uses reanalysis wind fields and ship emission information matched to observations of s

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2

Grieve, Stuart Michael. "Development of fast magnetic resonance imaging methods for investigation of the brain." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365824.

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3

Shanks, Sarah M. "Re:Visions : A Mother's Secondary Images." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1417785128.

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4

Mihoubi, Sofiane. "Snapshot multispectral image demosaicing and classification." Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1I062/document.

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Les caméras multispectrales échantillonnent le spectre du visible et/ou de l'infrarouge selon des bandes spectrales étroites. Parmi les technologies disponibles, Les caméras snapshot équipées d'une mosaïque de filtres acquièrent des images brutes à cadence vidéo. Ces images brutes nécessitent un processus de dématriçage permettant d'estimer l'image multispectrale en pleine définition. Dans ce manuscrit nous examinons les méthodes de dématriçage multispectrale et proposons une nouvelle méthode basée sur l'image panchromatique. De plus, nous mettons en évidence l'influence de l'illumination sur

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5

Fernandez, Ramos Javier. "Snapshot multispectral oximetry using image replication and birefringent spectrometry." Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/8162/.

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This thesis describes the improvements to the image replicating imaging spectrometer (IRIS) and the development of novel applications in the field of oximetry. IRIS is a snapshot multispectral device with a high transmission output and no need of inversion for data recovering, hence, with high signal-to-noise ratio (SNR). IRIS shows great versatility due to the possibility of choosing multiple contiguous or non-contiguous wavelengths inside its free spectral range. IRIS uses a set of waveplates and Wollaston prisms to demultiplex the spectral information of an object and replicate the image of

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6

Gorman, Alistair S. "Snapshot spectral imaging using image replication and birefringent interferometry : principles and applications." Thesis, Heriot-Watt University, 2011. http://hdl.handle.net/10399/2480.

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This thesis explores the image-replicating imaging spectrometer (IRIS). This relatively recent invention is a two-dimensional, snapshot spectral-imaging technology, capable of recording the spectral and spatial data from a scene instantaneously. Whereas conventional spectral-imaging technologies require multiple detector frames to record the entire data set, IRIS is able to record the data set in a single frame, a capability which is useful for highly dynamic scenes. The IRIS concept and the design of IRIS systems are explained in detail, and constraints on the performance of IRIS are determin

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7

Möller, Björn. "Full frame 3D snapshot : Possibilities and limitations of 3D image acquisition without scanning." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2857.

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<p>An investigation was initiated, targeting snapshot 3D image sensors, with the objective to match the speed and resolution of a scanning sheet-of-light system, without using a scanning motion. The goal was a system capable of acquiring 25 snapshot images per second from a quadratic scene with a side from 50 mm to 1000 mm, sampled in 512×512 height measurement points, and with a depth resolution of 1 µm and beyond. </p><p>A wide search of information about existing 3D measurement techniques resulted in a list of possible schemes, each presented with its advantages and disadvantages. No single

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8

Wong, Gerald. "Snapshot hyperspectral imaging : near-infrared image replicating imaging spectrometer and achromatisation of Wollaston prisms." Thesis, Heriot-Watt University, 2012. http://hdl.handle.net/10399/2615.

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Conventional hyperspectral imaging (HSI) techniques are time-sequential and rely on temporal scanning to capture hyperspectral images. This temporal constraint can limit the application of HSI to static scenes and platforms, where transient and dynamic events are not expected during data capture. The Near-Infrared Image Replicating Imaging Spectrometer (N-IRIS) sensor described in this thesis enables snapshot HSI in the short-wave infrared (SWIR), without the requirement for scanning and operates without rejection in polarised light. It operates in eight wavebands from 1.1μm to 1.7μm with a 2.

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9

Kunz, Joseph. "Political snapshots : the undecided voter's perceptions of internet based imagery during the 2004 presidential election campaign /." Online version of thesis, 2008. http://hdl.handle.net/1850/5764.

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10

Delgado, Parra Martha Irene. "La Imagen fortuita: la fotografía personal en la época de la telefonía móvil." Doctoral thesis, Universitat Pompeu Fabra, 2016. http://hdl.handle.net/10803/390953.

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Se explora la compleja fascinación que la fotografía despierta como medio de expresión, en la que se destaca la captura de imágenes en sí, como posibilidad para establecer un diálogo con el entorno y con uno mismo. Considerando que a partir de la integración de la cámara fotográfica al teléfono móvil, fotografiar se convierte en una experiencia que se integra a la vida cotidiana y, prácticamente, al alcance de casi cualquiera. Ello evidencia un tipo de imagen particular, que se ha denominado ‘imagen fortuita’. Se instaura este término con la finalidad de delimitar y caracterizar una especifici

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11

Mas, Adrien. "Etude et développement de caméras infrarouge multispectrales à acquisition simultanée pour la détection de gaz." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASP001.

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L’émission accidentelle de gaz sur des sites industriels ou l’utilisation d’armes chimiques peuvent avoir des conséquences dramatiques. Bertin Technologies commercialise une caméra multispectrale infrarouge utilisant un détecteur non-refroidi appelée Second Sight permettant de détecter de nombreux gaz. Cependant, l’acquisition temporelle des images spectrales est un frein pour une utilisation sur porteurs mobiles (véhicules, drones…). L’objet de la thèse a donc été d’étudier plusieurs concepts de caméras multispectrales à acquisition simultanée utilisant un seul détecteur non-refroidi. J’ai tr

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12

Wu, Mon-Wei, and 吳孟韋. "DCT Based Edge Detector for Snapshot Images." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/39633421422710894975.

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碩士<br>國立中正大學<br>電機工程研究所<br>90<br>In this thesis, we propose a discrete cosine transform (DCT)-based edge detector for snapshot images that are obtained by performing decimation (by a factor of two or more) on a much larger original image. We first partition the original image into non-overlapping blocks where the block size equals the decimation factor and then perform DCT on each block. The variances of the DCT’s AC coefficients are used to decide the edge map of snapshot images. Directional edge map of the snapshot images can also be generated if the variance of the directional AC coeffic

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13

Chang, Han-Yuan, and 張瀚元. "Advertisement Detection, Segmentation and Classification for Newspaper Images and Website Snapshots." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/dv22rq.

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碩士<br>國立中正大學<br>資訊工程研究所<br>104<br>There are many advertisements in our life, and we read various advertisements every day. Advertisement plays an important role in human commercial activity since human constructed the trade market system. Therefore, with the studies of advertisements, we can realize some issues about historical science and social science, or even the commercial strategy. In this thesis, we propose an advertisement detection, segmentation and classification framework. First, we extract advertisement candidates based on a connected components method. And then, we design two fil

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14

Garcia, Daniela Correia. "Imagens orfãs: uma abordagem ao estudo da fotografia do privado." Doctoral thesis, 2015. http://hdl.handle.net/10362/16265.

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Atualmente a fotografia encontra-‐se amplamente disseminada numa variedade de géneros e subgéneros, de práticas e usos em contextos diversos. O estatuto artístico que lhe é hoje reconhecido não obsta à prática generalizada por parte de fotógrafos amadores ou mesmo meros utilizadores, conferindo à fotografia um caráter ambivalente, que apontamos aqui como traço caraterístico. O objetivo desta investigação é contribuir para o desenvolvimento do campo de estudo da fotografia, nomeadamente da fotografia do privado. Este gén

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15

Shaw, Rayford Wesley. "A Structural analysis and visual abstraction of the pictorial in the Aeneid, I-VI." Thesis, 2000. http://hdl.handle.net/10500/16021.

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The pictorial elements of the first six books of the Aeneid can be evidenced through an examination of its structural components. With commentaries on such literary devices as parallels and antipodes, interwoven themes, cyclic patterns, and strategic placement of words in the text, three genres of painting are treated individually in Chapter 1 to illustrate the poet's consistency of design and to prove him a craftsman of the visual arts. In the first division, "Cinematic progression," attention is directed to the language which conveys movement and frequentative action, with special

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