Accedi

Bibliografie tematiche / Polarimetric camera

Letteratura scientifica selezionata sul tema "Polarimetric camera"

Autore: Grafiati

Pubblicato: 6 luglio 2024

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Consulta la lista di attuali articoli, libri, tesi, atti di convegni e altre fonti scientifiche attinenti al tema "Polarimetric camera".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Indice

Articoli di riviste
Tesi
Atti di convegni

Articoli di riviste sul tema "Polarimetric camera":

1

Birch, Philip, Rupert Young e Chris Chatwin. "Multiple-view polarimetric camera". Applied Optics 57, n. 22 (24 luglio 2018): 6329. http://dx.doi.org/10.1364/ao.57.006329.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

2

Chen, Mingce, Zhexun Li, Mao Ye, Taige Liu, Chai Hu, Jiashuo Shi, Kewei Liu, Zhe Wang e Xinyu Zhang. "All-In-Focus Polarimetric Imaging Based on an Integrated Plenoptic Camera with a Key Electrically Tunable LC Device". Micromachines 13, n. 2 (26 gennaio 2022): 192. http://dx.doi.org/10.3390/mi13020192.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

In this paper, a prototyped plenoptic camera based on a key electrically tunable liquid-crystal (LC) device for all-in-focus polarimetric imaging is proposed. By using computer numerical control machining and 3D printing, the proposed imaging architecture can be integrated into a hand-held prototyped plenoptic camera so as to greatly improve the applicability for outdoor imaging measurements. Compared with previous square-period liquid-crystal microlens arrays (LCMLA), the utilized hexagonal-period LCMLA has remarkably increased the light utilization rate by ~15%. Experiments demonstrate that the proposed imaging approach can simultaneously realize both the plenoptic and polarimetric imaging without any macroscopic moving parts. With the depth-based rendering method, both the all-in-focus images and the all-in-focus degree of linear polarization (DoLP) images can be obtained efficiently. Due to the large depth-of-field advantage of plenoptic cameras, the proposed camera enables polarimetric imaging in a larger depth range than conventional 2D polarimetric cameras. Currently, the raw light field images with three polarization states including I0 and I60 and I120 can be captured by the proposed imaging architecture, with a switching time of several tens of milliseconds. Some local patterns which are selected as interested target features can be effectively suppressed or obviously enhanced by switching the polarization state mentioned. According to experiments, the visibility in scattering medium can also be apparently improved. It can be expected that the proposed polarimetric imaging approach will exhibit an excellent development potential.

3

Chenault, David B., Justin P. Vaden, Douglas A. Mitchell e Erik D. Demicco. "Thermal Infrared Polarimetric Sensor for Automated Detection of Oil Spills". International Oil Spill Conference Proceedings 2017, n. 1 (1 maggio 2017): 2017402. http://dx.doi.org/10.7901/2169-3358-2017.1.000402.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

One of the most effective ways of minimizing oil spill impact is early detection. Effective early detection requires automated detection that relies as little as possible on an operator and can operate 24/7. A new and innovative optical detection system exploits the polarization of light, the same physics used to reduce glare through the use of polarized glasses but in the thermal infrared (TIR) portion of the optical spectrum. Measuring the polarization of thermally emitted radiation from an oil spill enhances the detection over conventional thermal cameras and has the potential to provide automated day / night monitoring and surveillance. The sensors developed thus far are relatively small and inexpensive and can be easily mounted in areas that need monitoring and installed in unmanned aerial systems (UAS). Since the sensor is adapted from a conventional TIR camera, thermal imagery as currently used is collected in addition to the polarimetric imagery to further improve the detection performance. Lens options enable wide area coverage at shorter ranges and higher resolution at longer ranges from the camera position. A TIR Polarimetric camera was tested at Ohmsett to establish performance under a variety of conditions. The Polarimetric camera was tested during the day and at night, under several different wave conditions generated in the wave tank, and with oil of different compositions and thicknesses. The imagery collected was analyzed to establish the contrast improvement through the polarimetric properties of the oil and to assess the automation of the detection process. In this poster, the sensor and test setup will be briefly described with detailed description of the results and the potential of this detection approach for automated detection.

4

Liu, Mingxin, Xin Zhang, Tao Liu, Guangwei Shi, Lingjie Wang e Yi Li. "On-Orbit Polarization Calibration for Multichannel Polarimetric Camera". Applied Sciences 9, n. 7 (4 aprile 2019): 1424. http://dx.doi.org/10.3390/app9071424.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

In this paper, a new on-orbit polarization calibration method for the multichannel polarimetric camera is presented. A polarization calibration model for the polarimetric camera is proposed by taking analysis of the polarization radiation transmission process. In order to get the polarization parameters in the calibration model, an on-orbit measurement scheme is reported, which uses a solar diffuser and a built-in rotatable linear analyzer. The advantages of this scheme are sharing the same calibration assembly with the radiometric calibration and acquiring sufficient polarization accuracy. The influence of the diffuser for the measurement is analyzed. By using a verification experiment, the proposed method can achieve on-orbit polarization calibration. The experimental results show that the relative deviation for the measured degree of linear polarization is 0.8% at 670 nm, which provides a foundation for the accurate application of polarimetric imaging detection.

5

Tu Bihai, 涂碧海, 洪津 Hong Jin, 姚萍萍 Yao Pingping, 孟炳寰 Meng Binhuan, 袁银麟 Yuan Yinlin, 张苗苗 Zhang Miaomiao e 翁建文 Weng Jianwen. "Polarization Detection Performance of Directional Polarimetric Camera". Acta Optica Sinica 40, n. 7 (2020): 0712003. http://dx.doi.org/10.3788/aos202040.0712003.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Huang, Chan, Guangfeng Xiang, Yuyang Chang, Lin Han, Miaomiao Zhang, Shuang Li, Bihai Tu, Binghuan Meng e Jin Hong. "Pre-flight calibration of a multi-angle polarimetric satellite sensor directional polarimetric camera". Optics Express 28, n. 9 (17 aprile 2020): 13187. http://dx.doi.org/10.1364/oe.391078.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

7

Yuan, Y., Z. Liu, X. Zheng, Q. Kang, H. Wu, J. Li, S. Li, D. Luo e J. Hong. "POLARIMETRIC CALIBRATION OF THE SPACEBORNE DIRECTIONAL POLARIMETRIC CAMERA INSTALLED ON THE GF-5 SATELLITE". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B1-2020 (6 agosto 2020): 599–606. http://dx.doi.org/10.5194/isprs-archives-xliii-b1-2020-599-2020.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

Abstract. The Spaceborne Directional Polarimetric Camera (SDPC) is dedicated to obtain an accurate information of clouds and microphysical properties of aerosol particles via multi-angle, multi-spectral and multi-polarization observations. It images the Earth with 110° field of view (FOV) in 3 polarimetric spectral bands and 5 non-polarimetric spectral bands from visible to near infrared. Due to its wide FOV telecentric optical system and multi-channels, polarization sensitivity of optical components (PSOC) and non-uniform response of pixels (NURP) are the main uncertainty factors of polarimetric calibration.In this paper, a polarimetric calibration model of SDPC has been constructed for increasing the measurement accuracy. Combined an integrating sphere with a polarization generator as source, PSOC can be measured in high accuracy by using the Fourier series analysis method which reduces the impact form the alignment error of the generator. The sectional viewing field measurement method is used to acquire NURP while the large aperture integrating sphere served as reference source. Subsequently, the data of NURP have been corrected by the relative transmittance of high frequency and low frequency respectively for polarized channels. The result of validation experiment shows that the polarization measurement errors in 0°, 15°, 30°, and 45° half field of view (HFOV) are all less than 0.5% when the degree of linear polarization of reference source is larger than 0.1.

8

ZHANG Miao-miao, 张苗苗, 孟炳寰 MENG Bing-huan, 韩琳 HAN Lin e 洪津 HONG Jin. "Correction of Ghost Artifacts for Directional Polarimetric Camera". ACTA PHOTONICA SINICA 48, n. 1 (2019): 111002. http://dx.doi.org/10.3788/gzxb20194801.0111002.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

9

Takeda, Shin’ichiro, Hirokazu Odaka, Junichiro Katsuta, Shin-nosuke Ishikawa, So-ichiro Sugimoto, Yuu Koseki, Shin Watanabe et al. "Polarimetric performance of Si/CdTe semiconductor Compton camera". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 622, n. 3 (ottobre 2010): 619–27. http://dx.doi.org/10.1016/j.nima.2010.07.077.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Chen, Zhenyue, Xia Wang, Shaun Pacheco e Rongguang Liang. "Impact of CCD camera SNR on polarimetric accuracy". Applied Optics 53, n. 32 (4 novembre 2014): 7649. http://dx.doi.org/10.1364/ao.53.007649.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Più fonti

Tesi sul tema "Polarimetric camera":

1

Smith, Phillip. "The uses of a polarimetric camera". Thesis, Monterey, Calif. : Naval Postgraduate School, 2008. http://edocs.nps.edu/npspubs/scholarly/theses/2008/Sept/08Sep%5FSmith%5FPhillip.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

Thesis (M.S. in Space Systems Operations)--Naval Postgraduate School, September 2008.
Thesis Advisor(s): Olsen, R. C. "September 2008." Description based on title screen as viewed on November 4, 2008. Includes bibliographical references (p. 57-60). Also available in print.

2

Umansky, Mark. "A Prototype Polarimetric Camera for Unmanned Ground Vehicles". Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23724.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

Unmanned ground vehicles are increasingly employing a combination of active sensors such as LIDAR with passive sensors like cameras to perform at all levels of perception, which includes detection, recognition and classification. Typical cameras measure the intensity of light at a variety of different wavelengths to classify objects in different areas of an image. A polarimetric camera not only measures intensity of light, but can also determine its state of polarization. The polarization of light is the angle the electric field of the wave of light takes as it travels. A polarimetric camera can identify the state of polarization of the light, which can be used to segment highly polarizing areas in a natural environment, such the surface of water. The polarimetric camera designed and built for this thesis was created with low cost in mind, as commercial polarimetric cameras are very expensive. It uses multiple beam splitters to split incoming light into four machine vision cameras. In front of each machine vision camera is a linear polarizing filter that is set to a specific orientation. Using the data from each camera, the Stokes vector can be calculated on a pixel by pixel basis to determine what areas of the image are more polarized. Test images of various scenes that included running water, standing water, mud, and vehicles showed promise in using polarization data to highlight and identify areas of interest. This data could be used by a UGV to make more informed decisions in an autonomous navigation mode.
Master of Science

3

Rodriguez, Joaquin. "Calibration and 3D vision with a color-polarimetric camera". Electronic Thesis or Diss., Bourgogne Franche-Comté, 2023. http://www.theses.fr/2023UBFCK062.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

Parmi les différentes modalités employées en détection, les capteurs de vision sont ceux qui fournissent le plus d'informations sur l'environnement. L'utilisation d'objectifs à courte focale permet en outre d'augmenter facilement la zone observée. L'apparition sur le marché d'imageurs couleurs et polarimétriques permet d'étendre encore davantage les applications en estimation de profondeur. En effet, les paramètres de polarisation de la lumière réfléchies ont liés à la nature des objets ainsi qu'à leur géométrie et peuvent être utilisés avantageusement. Dans cette thèse, notre objectif principal est d'étudier l'utilisation des données de polarisation pour améliorer les capacités de perception appliquées aux tâches robotiques, notamment dans la reconstruction de la profondeur de scène. De plus, nous visons à enrichir les connaissances dans le domaine de l'imagerie de polarisation en fournissant à d'autres chercheurs un ensemble d'outils qui leur permettront d'accéder rapidement à la modalité de polarisation. Après avoir effectué une introduction complète à la théorie et à la modélisation de la polarisation, nous décrivons comment calibrer un capteur de polarisation de division de plan focale. Ce dispositif de détection permet de capturer deux modalités (couleur et polarisation) avec une seule prise de vue. La nouvelle technique de calibration que nous proposons permet à ce dispositif de fournir des mesures plus précises en ajustant un modèle mathématique selon chaque pixel. La méthode que nous présentons ici vise à réduire la quantité d'équipement, donc le temps expérimental nécessaire pour obtenir des mesures calibrées. Nous détaillons également toute la physique sous-jacente à la technique de Shape-from-polarization (SfP) qui permet d'estimer le champ des normales d'un objet en utilisant l'information de la polarisation. Les équations nécessaires et les modèles inverses pour dériver les paramètres des vecteurs depuis l'état de polarisation sont détaillées tout en tenant compte du type de réflexion et du matériau. Nous mettons ici en avant l'intérêt de notre algorithme de calibrage sur l'estimation du champ de normales par polarisation L'estimation d'informations de profondeur grâce à l'intelligence artificielle a connu un essort très important ces dernières années. Dans ce contexte, nous proposons également un réseau d'apprentissage profond pour estimer la profondeur basé sur une architecture de fusion intermédiaire et une fonction de perte polarimétrique. L'objectif de ce développement est de montrer comment intégrer efficacement les contraintes de la théorie de la polarisation dans un algorithme basé sur les données. Une évaluation qualitative et quantitative des résultats démontrent l'intérêt de l'utilisation d'un imageur RGB-polarimétrique grâce à l'apport des informations de polarisation. Lors de ces travaux de recherche, une boîte à outils logiciel scomplète a également été développée proposant ainsi à la communauté scientifique un logiciel d'accès simplifié à l'imagerie polarimétrique
Among the different sensing modalities, vision sensors are the ones thatprovide the most abundant environmental information. Additionally, the usage ofa short focal length lens allows to easily increase the observed area. The releaseof color and polarimetric imagers makes it possible to extend even more thepolarimetric application related to depth estimation. Indeed, the polarizationparameters of the reflected light are related to the nature and to the geometryof the objects, which can be used advantageously. In this thesis, our mainobjective is to study the usage of polarization data to enhance theperception capabilities applied to robotics tasks, particularly in the task ofscene depth reconstruction. Furthermore, we aim to push the knowledge in thefield of polarization imaging by providing other researchers with a set of toolsthat will allow them to quickly access the polarization modality. After doing acomplete introduction to the polarization theory and modeling, we describe howto calibrate a DoFP sensor. This sensing device allows to capture twomodalities (color and polarization) with a single snapshot. The new calibrationtechnique that we propose enables this device to provide more accuratemeasurements by fitting a mathematical model to each individual pixel. Themethod we present here aims to reduce the amount of equipment and, thus theexperimental time required to obtain calibrated measurements. We make a detailedexplanation of the physics underlying the Shape-from-Polarization technique, which enablesthe normal field estimation of an object by using polarization cues. All therequired equations as well as their inverted versions for deriving the vectorparameters from the polarization state are detailed while taking intoconsideration the type of reflection and material. We also put in evidence theeffects of our calibration algorithm over the estimation of the normal vectorfield by using polarization. The estimation of depth information usingartificial intelligence has seen significant growth in recent years. In thiscontext, we also propose a deep-learning network to estimate depth based on amiddle-fusion architecture, and a polarimetric loss function. The objective ofthis development is to show how to effectively integrate the polarization theoryconstraints into a data-driven algorithm. A qualitative and quantitativeevaluation of the results shows the interest of using an RGB-polarimetric imagerthanks to the contribution of the polarization information. During this researchwork, a complete software toolbox was also developed, providing the scientificcommunity with simplified access to polarimetric imaging

4

Perrot, Clément. "Imagerie directe de systèmes planétaires avec SPHERE et prédiction des performances de MICADO sur l’E-ELT". Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCC212/document.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

Cette thèse s'inscrit dans la thématique de l'étude de la formation et de l'évolution des systèmes planétaire grâce à la méthode de l'imagerie à haut contraste, aussi appelée imagerie directe, par comparaison aux méthodes de détection dites "indirectes". Le travail que je présente dans ce manuscrit s'articule en deux parties bien distinctes. La première partie concerne la composante observationnel de ma thèse, à l'aide de l'instrument SPHERE installé au Very Large Telescope, au sein du consortium du même nom. L'instrument SPHERE a pour objectif la détection et la caractérisation de jeunes et massives exoplanètes mais également de disques circumstellaires allant des très jeune disques protoplanétaires aux disques de débris, plus âgés. Ainsi, je présente dans ce manuscrit ma contribution au programme SHINE, un grand relevé de 200 nuits dont le but est la détection de nouvelles exoplanètes ainsi que la caractérisation spectrale et orbitale des quelques compagnons déjà connus. J'y présente également les deux études de disques circumstellaires que j'ai réalisées, autour des étoiles HD 141569 et HIP 86598. La première étude ayant permis la découverte d'anneaux concentriques à quelques dizaine d'UA de l'étoile ainsi que de asymétrie dans le flux du disque inhabituelle. La seconde étude porte sur la découverte d'un disque de débris présentant également une asymétrie en flux inhabituelle. La deuxième partie concerne la composante instrumentale de mon travail de thèse, au sein du consortium MICADO, en charge de la conception de la caméra du même nom qui sera l'un des instruments de première lumière de l'Extremely Large Telescope Européen (ELT). Dans ce manuscrit, je présente l'étude que j'ai menée afin de définir le design de certain composant du mode coronographique de MICADO tout en tenant compte des contraintes de l'instrument qui n'est pas dédié à l'imagerie haut contraste, contrairement à SPHERE
This thesis is performed in the context of the study of the formation and evolution of planetary systems using high contrast imaging, also known as direct imaging in contrast to so-called "indirect" detection methods. The work I present in this manuscript is divided into two distinct parts.The first part concerns the observational component of my thesis, using the SPHERE instrument installed at Very LargeTelescope. This work was done as part of the consortium of the same name. The purpose of the SPHERE instrument is to detect and characterize young and massive exoplanets, but also circumstellar disks ranging from very young protoplanetary disks to older debris disks. In this manuscript, I present my contribution to the program SHINE, a large survey with an integration time of 200 nights' worth of observation, the goal of which is the detection of new exoplanets and the spectral and orbital characterization of some previously-known companions. I also present the two studies of circumstellar disks that I made, around the stars HD 141569 and HIP 86598. The first study allowed the discovery of concentric rings at about ten AU of the star along with an unusual flux asymmetry in the disk. The second study is about the discovery of a debris disk that also has an unusual flux asymmetry. The second part concerns the instrumental component of my thesis work done within the MICADO consortium, in charge of the design of the camera of the same name which will be one of the first light instruments of the European Extremely Large Telescope (ELT). In this manuscript, I present the study in which I define the design of some components of the coronagraphic mode of MICADO while taking into account the constraints of the instrument - which is not dedicated to high contrast imaging, unlike SPHERE

5

Torigoe, Marcelo. "Avaliação da camada de fibras nervosas da retina em pacientes com Doença de Alzheimer, utilizando o metodo do polarimetro de varredura a laser". [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/310202.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

Orientadores : Keila Mirian Monteiro de Carvalho, Jaime Antunes Maciel Jr
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas
Made available in DSpace on 2018-07-28T10:12:24Z (GMT). No. of bitstreams: 1 Torigoe_Marcelo_M.pdf: 16444336 bytes, checksum: 92fe8a666a9c759c3d5fb3ca350110f0 (MD5) Previous issue date: 2001
Resumo: A doença de Alzheimer é a forma mais comum de demência e afeta milhões de pessoas no mundo, aumentando sua prevalência com o aumento da expectativa de vida da população mundial. É caracterizada por uma deterioração da memória, linguagem, coordenação motora e reconhecimento visual. Existem evidências anátomofuncionais do acometimento no sistema visual periférico (retina e nervo óptico), onde são observadas uma diminuição da camada de células ganglionares da retina e no número de axônios no nervo óptico. Este estudo tem por objetivo comparar os resultados obtidos na avaliação da camada de fibras nervosas, utilizando o método do polarímetro de varredura a laser, em pacientes com doença de Alzheimer e indivíduos normais da mesma faixa etária. Estudou-se prospectivamente 31 indivíduos considerados neurologicamente normais e 11 indivíduos com diagnóstico de doença de Alzheimer (DA) provável...Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital
Abstract: Background: Defmite diagnosis of Alzheimer' s disease is only possible through neuropathological examintion and criteria for clinical diagnosis are esscntially basedon exclusion of other dementing conditions. Visual performance is impaired in patients with senile dementia of Alzheimer' s discasc. Purpose: To evaluate the effect of Alzheimer' s disease on retinal nerve fiber layer thickness measurements obtained with scanning laser polarimeter GOx- II...Note: The complete abstract is available with the full electronic digital thesis or dissertations
Mestrado
Oftalmologia
Mestre em Ciências Médicas

6

Avelino, Rodrigo Rezende Gomes. "Influencia da redução medicamentosa da pressão intra-ocular na medida da espessura da camada de fibras nervosas da retina de olhos hipertensos e glaucomatosos pela polarimetria de varredura a laser". [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/312262.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

Orientador: Vital Paulino Costa
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas
Made available in DSpace on 2018-08-09T04:54:16Z (GMT). No. of bitstreams: 1 Avelino_RodrigoRezendeGomes_M.pdf: 2930957 bytes, checksum: c66d1b04f0e830ee3e2b0a2e3897981b (MD5) Previous issue date: 2007
Resumo: Objetivo: Avaliar o efeito da redução da pressão intra-ocular (PIO) obtido com o uso de terapia medicamentosa na espessura da camada de fibras nervosas da retina medida pela Polarimetria de Varredura a Laser (PVL) em pacientes glaucomatosos ou hipertensos oculares. Métodos: Trinta e sete olhos de 37 pacientes foram prospectivamente incluídos no estudo e avaliados com a PVL sem uso de medicação ocular hipotensora e num período entre 15 e 30 dias após a instituição de medicação ocular hipotensora, que resultou em redução da PIO de pelo menos 25%. Os parâmetros medidos pela PVL antes e após a redução da PIO foram comparados com o teste t de Student pareado. Resultados: A PIO média dos 37 pacientes diminuiu significativamente de 26,57 ± 4,23 mmHg para 16,54 ± 2,92 mmHg (p<0,05) após terapia medicamentosa. Não houve diferença estatisticamente significativa entre os valores dos 10 parâmetros do PVL medidos antes e após a administração de medicação ocular hipotensora (p>0,05). Conclusão: A redução da PIO com o uso de medicação ocular hipotensora não altera a medida da espessura da camada de fibras nervosas da retina pela PVL em pacientes com glaucoma ou hipertensão ocular
Abstract: Purpose: To evaluate changes in retinal nerve fiber layer thickness as measured by scanning laser polarimetry (SLP) after the use of medication to reduce intraocular pressure (IOP) in glaucomatous or ocular hypertensive patients. Methods: The authors prospectively enrolled 37 eyes of 37 patients in whom IOP was reduced by more than 25% after the use of medication. The images were obtained before and 15 to 30 days after the introduction of medication. The SLP parameters measured before and after the use of medication were compared using paired Student¿s t Test. Results: The mean IOP was significantly reduced from 26.57 ± 4.23 mmHg to 16.54 ± 2.92 mmHg after the use of medication (p<0.05). None of the 10 SLP analyzed parameters was significantly affected by the reduction of IOP with medication (p>0.05). Conclusion: The retinal nerve fiber layer thickness, as measured by SLP, is not affected by the reduction of IOP with medication in patients with glaucoma or ocular hypertension
Mestrado
Oftalmologia
Mestre em Ciências Médicas

7

Leal, Bruno Campêlo. ""Análise comparativa das medidas de espessura da camada de fibras nervosas da retina de pacientes com atrofia em banda do nervo óptico e de indivíduos normais através da tomografia de coerência óptica e da polarimetria a laser"". Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/5/5149/tde-13092006-160053/.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

As afecções que acometem a via óptica anterior podem acarretar perda de fibras das células ganglionares retinianas, gerando alterações na camada de fibras nervosas da retina (CFNR). O objetivo deste trabalho foi o de comparar a capacidade da tomografia de coerência óptica (OCT-1), do OCT 3 (Stratus OCT) e do polarímetro de varredura a laser (GDx) em diferenciar olhos normais de olhos com atrofia em banda do nervo óptico e hemianopsia temporal, assim como, comparar o desempenho de tais tecnologias entre si. Foram estudados 37 indivíduos num total de 46 olhos divididos igualmente em dois grupos. O Stratus OCT, o OCT 1 e o GDx se mostraram capazes de identificar corretamente a redução global (average) da espessura da CFNR dos indivíduos com AB comparados com uma população normal. Observamos uma melhora progressiva das sensibilidades/especificidades e das AROC, com o desempenho melhor do OCT1 sobre o GDx e do Stratus OCT sobre o OCT 1
Most diseases that affect the optic pathways present clinically with loss of one or more visual functions.When optic pathway injuries involve the anterior visual pathways they may cause loss of the retinal nerve fiber layer (RNFL) and "band atrophy" (BA). The purpose of this study was therefore to compare the ability of the optical coherence tomography (OCT) 1, the OCT 3 (Stratus OCT) and the scanning laser polarimetry (GDx) to differentiate normal eyes from eyes with BA of the optic nerve and temporal hemianopsia. Thirty-seven individuals in a total of 46 eyes divided equally in two groups were studied. Each one of the parameters, except the values from the nasal quadrant measured by the GDx, showed statistically significant difference when we compare normal patients with the BA group. The study also showed a gradual improvement of the sensibilities/specificities and of the AROC, with a better performance of the OCT1 compared to GDx and of the Stratus OCT compared to the OCT 1

8

""Análise comparativa das medidas de espessura da camada de fibras nervosas da retina de pacientes com atrofia em banda do nervo óptico e de indivíduos normais através da tomografia de coerência óptica e da polarimetria a laser"". Tese, Biblioteca Digital de Teses e Dissertações da USP, 2006. http://www.teses.usp.br/teses/disponiveis/5/5149/tde-13092006-160053/.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Atti di convegni sul tema "Polarimetric camera":

1

Zhang, Lidan, Yimin Ding, Shengyuan Chang, Yao Duan, Xi Chen e Xingjie Ni. "Metasurface-Enabled Hyperspectral Polarimetric Camera". In CLEO: QELS_Fundamental Science. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_qels.2022.fm4h.3.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

We theoretically and experimentally demonstrate a metasurface capable of processing multidimensional optical information, including light intensity distribution, spectrum, and polarization, which can be used for hyperspectral polarimetric camera.

2

Barbour, B. "Infrared Polarimetric Camera development". In Second International Conference on Detection of Abandoned Land Mines. IEE, 1998. http://dx.doi.org/10.1049/cp:19980705.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

3

Barnes, Howard B., Michael W. Jones e Paul K. Bishop. "Infrared polarimetric camera system development". In AeroSense '99, a cura di Abinash C. Dubey, James F. Harvey, J. Thomas Broach e Regina E. Dugan. SPIE, 1999. http://dx.doi.org/10.1117/12.357006.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

4

Catanzaro, Brian, Jim Lorenz e Mark Dombrowski. "Compact CMOS multispectral/polarimetric camera". In Defense and Security Symposium, a cura di Sylvia S. Shen e Paul E. Lewis. SPIE, 2006. http://dx.doi.org/10.1117/12.666494.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

5

Wang, Zhixiang, Yinqiang Zheng e Yung-Yu Chuang. "Polarimetric Camera Calibration Using an LCD Monitor". In 2019 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR). IEEE, 2019. http://dx.doi.org/10.1109/cvpr.2019.00386.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Nozawa, Itta, Masaki Amada e Shinichiro Tsukahara. "Anomaly Detection of Injection Molded Products Using Polarimetric Camera and AnoGAN". In Imaging Systems and Applications. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/isa.2023.itu2e.6.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

Abstract (sommario):

This paper reports on anomaly-detection method for injection molded products using polarimetric imaging and AnoGAN. As a result, we demonstrated the effectiveness of this method by verifying the AUC score was 0.94.

7

Charcos-Llorens, Miguel V., Stephen S. Eikenberry, Michelle L. Edwards, Nestor M. Lasso, Antonio Marin-Franch e Christopher C. Packham. "Polarimetric capabilities with the Canarias InfraRed Camera Experiment (CIRCE)". In SPIE Astronomical Telescopes + Instrumentation, a cura di Ian S. McLean e Mark M. Casali. SPIE, 2008. http://dx.doi.org/10.1117/12.788350.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

8

Bertschy, Yannick, e Yoav Y. Schechner. "Vicarious spaceborne polarimetric camera calibration using solar power stations". In Polarization: Measurement, Analysis, and Remote Sensing XV, a cura di David B. Chenault e Meredith K. Kupinski. SPIE, 2022. http://dx.doi.org/10.1117/12.2622496.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

9

Können, G. P. "Halo Photopolarimetry and Direct Crystal Sizing". In Light and Color in the Open Air. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/lcoa.1993.thd.2.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Chenault, David B., e Justin P. Vaden. "Uncooled IR polarimetric imaging camera and performance metrics (Conference Presentation)". In Infrared Technology and Applications XLVI, a cura di Gabor F. Fulop, Lucy Zheng, Bjørn F. Andresen e John Lester Miller. SPIE, 2020. http://dx.doi.org/10.1117/12.2558851.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri