Journal articles: 'Imagerie en direct'

1

Billotey, C., and O. Clément. "4429 Imagerie cellulaire in vivo (marquage direct et ciblage)." Journal de Radiologie 87, no. 10 (October 2006): 1186. http://dx.doi.org/10.1016/s0221-0363(06)86671-0.

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Fenoglietto, P., L. Bedos, O. Chapet, O. Riou, J. Molinier, N. Aillères, and D. Azria. "Suivi en direct du mouvement prostatique par imagerie de basse énergie (kV) pendant la fraction lors d’une arcthérapie volumétrique modulée (VMAT) hypofractionnée." Cancer/Radiothérapie 17, no. 5-6 (October 2013): 601. http://dx.doi.org/10.1016/j.canrad.2013.07.047.

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Saadi, Sanae, Driss Khattach, Mohamed Sbaa, Mohamed El Kharmouz, and Olivier Kaufmann. "Reconnaissance par imagerie électrique du site pollué de la décharge publique de la ville d’Oujda (Maroc oriental)." Revue des sciences de l’eau 28, no. 2 (July 7, 2015): 165–77. http://dx.doi.org/10.7202/1032296ar.

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La décharge non contrôlée d’ordures ménagères de Sidi Yahya se trouve à environ 7 km au sud-est de la ville d’Oujda (Maroc nord-oriental). Le tonnage total de déchets qui y sont déversés est de 1,2 à 1,5 million de tonnes pendant la période de l’exploitation (1990-2005). La surface totale qui a été entièrement utilisée est de 41 hectares. Les eaux souterraines, situées à 30 m environ sous le sol, circulent dans des terrains post-miocènes sur un substratum imperméable formé par les marnes du Miocène. Le sol est de type calcimagnésique peu profond, avec une couche plus ou moins importante de limons et d’argiles. Les eaux provenant des déchets eux-mêmes ou issues de la dégradation de la matière organique en conditions aérobies, ainsi que les eaux météoriques, en percolant à travers les déchets, s’enrichissent en divers polluants appelés lixiviats ou percolats. Afin de connaître la destination de ces percolats dans le sous-sol, une étude géophysique par imagerie électrique a été menée dans la partie dégagée de la décharge. Quatre profils de reconnaissance ont été réalisés selon le dispositif dipôle-dipôle. Les résultats de la prospection géoélectrique ont montré que les très faibles résistivités électriques (< 5 Ωm), ont été observées au sein et à l’aval direct du site de la décharge. Ces résultats mettent bien en évidence des zones électriquement très conductrices et elles indiquent la progression du panache de lixiviats dans le sous-sol. La partie centrale de la décharge est l’endroit sous lequel la contamination a atteint des profondeurs qui dépassent les 20 m. Ceci plaide en faveur d’une forte minéralisation des eaux circulant dans les formations sous-jacentes au site, dont la source potentielle est liée à une contamination par des eaux de lixiviats très minéralisées et chargées en matière organique.

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Deltour, S. "Prise en charge des infarctus cérébraux." Médecine Intensive Réanimation 27, no. 5 (September 2018): 452–60. http://dx.doi.org/10.3166/rea-2018-0054.

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La prise en charge de l’infarctus cérébral aigu s’est considérablement améliorée ces dernières années grâce à de nouvelles techniques combinant imagerie et nouveaux traitements. La formalisation d’un parcours spécifique, multidisciplinaire (neurologues, radiologues, urgentistes et réanimateurs), a permis un véritable gain d’efficacité. Une course contre la montre s’enclenche dès les premiers signes cliniques évocateurs d’un accident vasculaire cérébral. L’approche thérapeutique actuelle, combinant thrombectomie et fibrinolyse dans les six premières heures après l’apparition des symptômes, a transformé le pronostic. Très récemment, des études rapportent un bénéfice de la thrombectomie jusqu’à 24 heures du début des symptômes chez des patients très sélectionnés. En outre, l’accès rapide à une unité neurovasculaire (UNV) est déterminant dans la réduction de la morbidité et du handicap, en dehors de tout traitement spécifique de recanalisation (effet stroke center). Ces nouvelles données impactent considérablement le schéma organisationnel des premières heures, définissant deux stratégies d’orientation du patient : transfert direct (mother ship) dans un centre associant UNVet centre de neuroradiologie interventionnelle (NRI) ou accueil dans une UNV et transfert secondaire dans un centre de NRI si nécessaire (drip and ship).

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Schmit, Timothy J., Paul Griffith, Mathew M. Gunshor, Jaime M. Daniels, Steven J. Goodman, and William J. Lebair. "A Closer Look at the ABI on the GOES-R Series." Bulletin of the American Meteorological Society 98, no. 4 (April 1, 2017): 681–98. http://dx.doi.org/10.1175/bams-d-15-00230.1.

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Abstract The Advanced Baseline Imager (ABI) on board the Geostationary Operational Environmental Satellite-R (GOES-R) is America’s next-generation geostationary advanced imager. GOES-R launched on 19 November 2016. The ABI is a state-of-the-art 16-band radiometer, with spectral bands covering the visible, near-infrared, and infrared portions of the electromagnetic spectrum. Many attributes of the ABI—such as spectral, spatial, and temporal resolution; radiometrics; and image navigation/registration—are much improved from the current series of GOES imagers. This paper highlights and discusses the expected improvements of each of these attributes. From ABI data many higher-level-derived products can be generated and used in a large number of environmental applications. The ABI’s design allows rapid-scan and contiguous U.S. imaging automatically interleaved with full-disk scanning. In this paper the expected instrument attributes are covered, as they relate to signal-to-noise ratio, image navigation and registration, the various ABI scan modes, and other parameters. There will be several methods for users to acquire GOES-R imagery and products depending on their needs. These include direct reception of the imagery via the satellite downlink and an online-accessible archive. The information from the ABI on the GOES-R series will be used for many applications related to severe weather, tropical cyclones and hurricanes, aviation, natural hazards, the atmosphere, the ocean, and the cryosphere. The ABI on the GOES-R series is America’s next-generation geostationary advanced imager and will dramatically improve the monitoring of many phenomena at finer time and space scales.

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Zou, X., Z. Qin, and Y. Zheng. "Improved Tropical Storm Forecasts with GOES-13/15 Imager Radiance Assimilation and Asymmetric Vortex Initialization in HWRF." Monthly Weather Review 143, no. 7 (July 1, 2015): 2485–505. http://dx.doi.org/10.1175/mwr-d-14-00223.1.

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Abstract The Geostationary Operational Environmental Satellite (GOES) imagers provide high temporal- and spatial-resolution data for many applications, such as monitoring severe weather events. In this study, radiance observations of four infrared channels from GOES-13 and GOES-15 imagers are directly assimilated using the National Centers for Environmental Prediction (NCEP) gridpoint statistical interpolation (GSI) analysis system to produce the initial conditions for the Hurricane Weather Research and Forecasting Model (HWRF). Impacts of GOES imager data assimilation on track and intensity forecasts are demonstrated for a landfalling tropical storm that moved across the Gulf of Mexico—Debby (2012). With a higher model top and a warm start, an asymmetric component is also added to the original HWRF symmetric vortex initialization. Two pairs of data assimilation and forecasting experiments are carried out for assessing the impacts of the GOES imager data assimilation on tropical storm forecasts. The first pair employs a symmetric vortex initialization and the second pair includes an asymmetric vortex initialization. Numerical forecast results from these experiments are compared against each other. It is shown that a direct assimilation of GOES-13 and GOES-15 imager radiance observations, which are available at all analysis times, in HWRF results in a consistently positive impact on the track and intensity forecasts of Tropical Storm Debby in the Gulf of Mexico. The largest positive impact on the track and intensity forecasts comes from a combined effect of GOES imager radiance assimilation and an asymmetric vortex initialization.

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Zou, Xiaolei, Zhengkun Qin, and Fuzhong Weng. "Improved Coastal Precipitation Forecasts with Direct Assimilation of GOES-11/12 Imager Radiances." Monthly Weather Review 139, no. 12 (December 1, 2011): 3711–29. http://dx.doi.org/10.1175/mwr-d-10-05040.1.

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Abstract The Geostationary Operational Environmental Satellite (GOES) imager provides observations that are of high spatial and temporal resolution and can be applied for effectively monitoring and nowcasting severe weather events. In this study, improved quantitative precipitation forecasts (QPFs) for three coastal storms over the northern Gulf of Mexico and the East Coast is demonstrated by assimilating GOES-11 and GOES-12 imager radiances into the Weather Research and Forecasting (WRF) model. Both the National Centers for Environmental Prediction (NCEP) Gridpoint Statistical Interpolation (GSI) analysis system and the Community Radiative Transfer Model (CRTM) are utilized to ingest GOES IR clear-sky data. Assimilation of GOES imager radiances during a 6–12-h time window prior to convective initiation and/or development could significantly improve the precipitation forecasts near the coast of the northern Gulf of Mexico. The 3-h accumulative precipitation threat scores are increased by about 20% after 6 h of model forecasts and more than 50% after 18–24 h of model forecasts. A detailed diagnosis of analysis fields and model forecast fields is carried out for one of the three convective precipitation events included in this study. It is shown that the assimilation of GOES data in regions of no or little clouds improved the model description of an upstream midlatitude trough and a subtropical high located in the south of the convection. The GOES observations located in the western part of land region covered by GOES within the latitude zone of 18°–37°N near 100°W contributed to a better forecast of the position of the eastward-propagating trough, while GOES observations over the Gulf of Mexico increased the amount of water vapor advection from the south into the convective region by the wind associated with the subtropical high. In the past, GOES imager radiances were not directly used in the GSI system. This study highlights the importance of satellite imagery information observed in the preconvective environment for improved cloud and precipitation forecasts. The developed data assimilation technique will prepare the NWP user community for accelerated use of advanced satellite data from the GOES-R series.

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Kangas, Jarkko. "Picturing two modernities." Nordicom Review 40, no. 1 (February 19, 2019): 61–74. http://dx.doi.org/10.2478/nor-2019-0003.

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AbstractThe article analyses the discursive roles of two prominent themes of the habitual media climate change imagery: “the smokestack” and “renewable energy”. Through semiotic analysis of connotation and thematic content analysis of images inThe Guardian, the article argues that the constant reliance on these two themes and the particular ways of representing them sustain a definition of climate change as atechnological dualism.The article argues further that this dualism of “dirty” and “clean” technologies, as the predominant way of visualising direct causes of and responses to climate change, articulates ecological modernisation discourse and its central storyline of progressing from “defiling growth” toward “sustainable development” (Hajer, 1995). The article suggests (1) further research on conventional thematic imageries as a meaningful approach to studying policy discourses and (2) the relevance of applying concepts of policy research to understanding and challenging the political bearings of prominent visualisations.

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9

Pfurtscheller, G., and C. Neuper. "Motor imagery and direct brain-computer communication." Proceedings of the IEEE 89, no. 7 (July 2001): 1123–34. http://dx.doi.org/10.1109/5.939829.

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10

Turner, Darren, Arko Lucieer, and Luke Wallace. "Direct Georeferencing of Ultrahigh-Resolution UAV Imagery." IEEE Transactions on Geoscience and Remote Sensing 52, no. 5 (May 2014): 2738–45. http://dx.doi.org/10.1109/tgrs.2013.2265295.

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11

Beuzit, J. L., A. Vigan, D. Mouillet, K. Dohlen, R. Gratton, A. Boccaletti, J. F. Sauvage, et al. "SPHERE: the exoplanet imager for the Very Large Telescope." Astronomy & Astrophysics 631 (November 2019): A155. http://dx.doi.org/10.1051/0004-6361/201935251.

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Observations of circumstellar environments that look for the direct signal of exoplanets and the scattered light from disks have significant instrumental implications. In the past 15 years, major developments in adaptive optics, coronagraphy, optical manufacturing, wavefront sensing, and data processing, together with a consistent global system analysis have brought about a new generation of high-contrast imagers and spectrographs on large ground-based telescopes with much better performance. One of the most productive imagers is the Spectro-Polarimetic High contrast imager for Exoplanets REsearch (SPHERE), which was designed and built for the ESO Very Large Telescope (VLT) in Chile. SPHERE includes an extreme adaptive optics system, a highly stable common path interface, several types of coronagraphs, and three science instruments. Two of them, the Integral Field Spectrograph (IFS) and the Infra-Red Dual-band Imager and Spectrograph (IRDIS), were designed to efficiently cover the near-infrared range in a single observation for an efficient search of young planets. The third instrument, ZIMPOL, was designed for visible polarimetric observation to look for the reflected light of exoplanets and the light scattered by debris disks. These three scientific instruments enable the study of circumstellar environments at unprecedented angular resolution, both in the visible and the near-infrared. In this work, we thoroughly present SPHERE and its on-sky performance after four years of operations at the VLT.

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Shields, Mary E. "Circumcision of the Prostitute: Gender, Sexuality, and the Call To Repentance in Jeremiah 3:1- 4:41." Biblical Interpretation 3, no. 1 (1995): 61–74. http://dx.doi.org/10.1163/156851595x00041.

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AbstractThe move from accusation to promise in Jer. 3:1—4:4 is mirrored by a move from female imagery to male imagery. The passage begins with marriage imagery: God as the husband, and Israel as the wife who acts like a harlot. Sister imagery is used next to portray the "rivalry" in prostitution between Judah and the northern kingdom. When the chapter begins to move to the possibility of repentance, however, the imagery changes to father-son imagery, God being the father and Israel being the repentant and obedient son. The last shift in imagery, that of circumcision, as a sign both of human repentance and of God's promise, occurs in Jer. 4:1-4. In addition to shifts in imagery, there are also shifts in mode of address, from feminine direct address to masculine direct address. Equally significant as the shift in imagery, the direct address is used rhetorically to pressure the audience into identifying in one way as opposed to another (e.g., to identify as the proper sons to God as father rather than as unfaithful wife to God as husband). This article explores these shifts in gender imagery and direct address, focusing on the ways in which gender and sexuality are constructed in this chapter, and how they in turn construct the call to repentance.

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Saruco, Elodie, Franck Di Rienzo, Susana Nunez-Nagy, Miguel A. Rubio-Gonzalez, Ursula Debarnot, Christian Collet, Aymeric Guillot, and Arnaud Saimpont. "Optimal Combination of Anodal Transcranial Direct Current Stimulations and Motor Imagery Interventions." Neural Plasticity 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/5351627.

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Motor imagery contributes to enhance the (re)learning of motor skills through remapping of cortical networks. Combining motor imagery with anodal transcranial direct-current stimulation (a-tDCS) over the primary motor cortex has further been shown to promote its beneficial effects on postural control. Whether motor imagery should be performed concomitantly to a-tDCS (over depolarized membrane) or consecutively (over changing neurotransmitters activity) remains to be elucidated. In the present study, we measured the performance in a postural control task before and after three experimental conditions. Participants received a-tDCS before (tDCSBefore), during (tDCSDuring), or both before and during motor imagery training (tDCSBefore + During). Performance was improved after tDCSDuring, but not after both the tDCSBefore and tDCSBefore + During conditions. These results support that homeostatic plasticity is likely to operate following a-tDCS through decreasing cortical excitability and that motor imagery should be performed during anodal stimulation for optimum gains.

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Zentai, George. "Photoconductor-based (direct) large-area x-ray imagers." Journal of the Society for Information Display 17, no. 6 (2009): 543. http://dx.doi.org/10.1889/jsid17.6.543.

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Wang, Likun, Xiangqian Wu, Mitch Goldberg, Changyong Cao, Yaping Li, and Seung-Hee Sohn. "Comparison of AIRS and IASI Radiances Using GOES Imagers as Transfer Radiometers toward Climate Data Records." Journal of Applied Meteorology and Climatology 49, no. 3 (March 1, 2010): 478–92. http://dx.doi.org/10.1175/2009jamc2218.1.

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Abstract The Atmospheric Infrared Sounder (AIRS) and the Infrared Atmospheric Sounding Interferometer (IASI), together with the future Cross-track Infrared Sounder, will provide long-term hyperspectral measurements of the earth and its atmosphere at ∼10 km spatial resolution. Quantifying the radiometric difference between AIRS and IASI is crucial for creating fundamental climate data records and establishing the space-based infrared calibration standard. Since AIRS and IASI have different local equator crossing times, a direct comparison of these two instruments over the tropical regions is not feasible. Using the Geostationary Operational Environmental Satellite (GOES) imagers as transfer radiometers, this study compares AIRS and IASI over warm scenes in the tropical regions for a time period of 16 months. The double differences between AIRS and IASI radiance biases relative to the GOES-11 and -12 imagers are used to quantify the radiance differences between AIRS and IASI within the GOES imager spectral channels. The results indicate that, at the 95% confidence level, the mean values of the IASI − AIRS brightness temperature differences for warm scenes are very small, that is, −0.0641 ± 0.0074 K, −0.0432 ± 0.0114 K, and −0.0095 ± 0.0151 K for the GOES-11 6.7-, 10.7-, and 12.0-μm channels, respectively, and −0.0490 ± 0.0100 K, −0.0419 ± 0.0224 K, and −0.0884 ± 0.0160 K for the GOES-12 6.5-, 10.7-, and 13.3-μm channels, respectively. The brightness temperature biases between AIRS and IASI within the GOES imager spectral range are less than 0.1 K although the AIRS measurements are slightly warmer than those of IASI.

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Zhang, Sarah. "Lyrical Slippage, Meaning-Making, and Proximity in Song 2:10-13." Biblical Interpretation 27, no. 1 (March 11, 2019): 20–35. http://dx.doi.org/10.1163/15685152-00271p02.

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Abstract Where does lyric significance happen? With recent interdisciplinary studies from the fields of aesthetics and neuroscience offering support to Emmanuel Levinas’s idea of proximity, I propose that proximity is the maternal body of lyrical meaning. In this paper, I will illustrate the case by unpacking the mental processing of the lyrical imageries in Song 2:10–13, and highlight two aspects of proximity along the way. First, the perception of lyrical imagery is more complex than a representational correspondence between the word and the world. It covers the stages from the verbal cues to multisensory imageries, to evoked synaesthetic experiences, to accompanied feelings and provoked actions. Cognitively it is best described as one’s approximation toward the core semantic sense of the verbal cues, which is diversified by the reader’s embodied minds. Second, at the root of the aesthetic experience is one’s sense of self, which is susceptible to the intrigue of alterity. One’s reception of lyrical imageries in Song 2:10–13 can be characterized as an over-abundant synaesthetic experience. It directs one’s attention to an anterior receptivity embedded in subjectivity by way of the excess of the sensing over the semantic, and the sensed over the sensing. This reduction to the baseline level of function, or the sheer sensation of oneself, beckons the lyrical subject to become aware of one’s a prior proximity to alterity. In brief, while the readers’ individualized approximations preclude a verifiable universal reception, they do not warrant the kind of hermeneutic violence that overrides the text with the readers’ contexts. Rather, by being awakened to one’s susceptibility to the otherness of the poem, the lyrical subject realizes that proximity is the ethical precondition in making sense of the poem and oneself.

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Gonzalez, BSc, Anthony R., and Samuel H. Amber, PhD. "Recent field experiments with commercial satellite imagery direct downlink." Journal of Emergency Management 15, no. 1 (January 1, 2017): 62. http://dx.doi.org/10.5055/jem.2017.0313.

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US Pacific Command's strategy includes assistance to United States government relief agencies and nongovernment organizations during humanitarian aid and disaster relief operations in the Asia-Pacific region. Situational awareness during these operations is enhanced by broad interagency access to unclassified commercial satellite imagery. The Remote Ground Terminal—a mobile satellite downlink ground station—has undergone several technology demonstrations and participated in an overseas deployment exercise focused on a natural disaster scenario. This ground station has received new commercial imagery within 20 minutes, hastening a normally days-long process. The Army Geospatial Center continues to manage technology development and product improvement for the Remote Ground Terminal. Furthermore, this ground station is now on a technology transition path into the Distributed Common Ground System-Army program of record.

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Shen, Xiang, Yongjun Zhang, and Qingquan Li. "Accurate direct georeferencing of aerial imagery in national coordinates." ISPRS Journal of Photogrammetry and Remote Sensing 105 (July 2015): 13–18. http://dx.doi.org/10.1016/j.isprsjprs.2015.03.008.

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Jamal, Saleha, and Md Ashif Ali. "Remote Sensing Application for Exploring Land Use and Land Cover Dynamics in and Around Chatra Wetland, English Bazar, West Bengal." Creative Space 9, no. 1 (July 6, 2021): 15–27. http://dx.doi.org/10.15415/cs.2021.91002.

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Wetlands are often called as biological “supermarket” and “kidneys of the landscape” due to their multiple functions, including water purification, water storage, processing of carbon and other nutrients, stabilization of shorelines and support of aquatic lives. Unfortunately, although being dynamic and productive ecosystem, these wetlands have been affected by human induced land use changes. India is losing wetlands at the rate of 2 to 3 per cent each year due to over-population, direct deforestation, urban encroachment, over fishing, irrigation and agriculture etc (Prasher, 2018). The present study tries to investigate the nature and degree of land use/land cover transformation, their causes and resultant effects on Chatra Wetland. To fulfil the purpose of the study, GIS and remote sensing techniques have been employed. Satellite imageries have been used from United States Geological Survey (USGS) Landsat 7 Enhanced Thematic Mapper plus and Landsat 8 Operational Land Imager for the year 2003 and 2018. Cloud free imageries of 2003 and 2018 have been downloaded from USGS (https://glovis.usgs.gov/) for the month of March and April respectively. Image processing, supervised classificationhas been done in ArcGis 10.5 and ERDAS IMAGINE 14. The study reveals that the settlement hasincreased by about 90.43 per cent in the last 15 years around the Chatra wetland within the bufferzone of 2 Sq km. Similarly agriculture, vegetation, water body, swamp and wasteland witnessed asignificant decrease by 5.94 per cent, 57.69 per cent, 26.64 per cent 4.52 per cent and 55.27 per centrespectively from 2003 to 2018.

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Almar, Rafael, Rodrigo Cienfuegos, Patricio A. Catalán, Hervé Michallet, Bruno Castelle, Philippe Bonneton, and Vincent Marieu. "A new breaking wave height direct estimator from video imagery." Coastal Engineering 61 (March 2012): 42–48. http://dx.doi.org/10.1016/j.coastaleng.2011.12.004.

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Meirink, J. F., R. A. Roebeling, and P. Stammes. "Inter-calibration of polar imager solar channels using SEVIRI." Atmospheric Measurement Techniques 6, no. 9 (September 26, 2013): 2495–508. http://dx.doi.org/10.5194/amt-6-2495-2013.

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Abstract. Accurate calibration of satellite imagers is a prerequisite for using their measurements in climate applications. Here we present a method for the inter-calibration of geostationary and polar-orbiting imager solar channels based on regressions of collocated near-nadir reflectances. Specific attention is paid to correcting for differences in spectral response between instruments. The method is used to calibrate the solar channels of the Spinning Enhanced Visible and Infrared Imager (SEVIRI) on the geostationary Meteosat satellite with corresponding channels of the Moderate Resolution Imaging Spectroradiometer (MODIS) on the polar-orbiting Aqua satellite. The SEVIRI operational calibration is found to be stable during the years 2004 to 2009, but offset by −8, −6, and +3.5 % for channels 1 (0.6 μm), 2 (0.8 μm), and 3 (1.6 μm), respectively. These results are robust for a range of choices that can be made regarding data collocation and selection, as long as the viewing and illumination geometries of the two instruments are matched. Uncertainties in the inter-calibration method are estimated to be 1 % for channel 1 and 1.5 % for channels 2 and 3. A specific application of our method is the inter-calibration of polar imagers using SEVIRI as a transfer instrument. This offers an alternative to direct inter-calibration, which in general has to rely on high-latitude collocations. Using this method we have tied MODIS-Terra and Advanced Very High Resolution Radiometer (AVHRR) instruments on National Oceanic and Atmospheric Administration (NOAA) satellites 17 and 18 to MODIS-Aqua for the years 2007 to 2009. While reflectances of the two MODIS instruments differ less than 2 % for all channels considered, deviations of an existing AVHRR calibration from MODIS-Aqua reach −3.5 and +2.5 % for the 0.8 and 1.6 μm channels, respectively.

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Meirink, J. F., R. A. Roebeling, and P. Stammes. "Inter-calibration of polar imager solar channels using SEVIRI." Atmospheric Measurement Techniques Discussions 6, no. 2 (April 3, 2013): 3215–47. http://dx.doi.org/10.5194/amtd-6-3215-2013.

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Abstract. Accurate calibration of satellite imagers is a prerequisite for using their measurements in climate applications. Here we present a method for the inter-calibration of geostationary and polar-orbiting imager solar channels based on regressions of collocated near-nadir radiances. Specific attention is paid to correcting for differences in spectral response between instruments. The method is used to calibrate the solar channels of the Spinning Enhanced Visible and Infrared Imager (SEVIRI) on the geostationary Meteosat satellite with corresponding channels of the Moderate Resolution Imaging Spectroradiometer (MODIS) on the polar-orbiting Aqua satellite. The SEVIRI operational calibration is found to be stable during the years 2004 to 2009 but off by −8, −6, and +3.5% for channels 1 (0.6 μm), 2 (0.8 μm), and 3 (1.6 μm), respectively. These results are robust for a range of choices that can be made regarding data collocation and selection, as long as the viewing and illumination geometries of the two instruments are matched. Uncertainties in the inter-calibration method are estimated to be 1% for channel 1 and 1.5% for channels 2 and 3. A specific application of the method is the inter-calibration of polar imagers using SEVIRI as a transfer instrument. This offers an alternative to direct inter-calibration, which in general has to rely on high-latitude collocations. Using this method we have tied MODIS-Terra and Advanced Very High Resolution Radiometer (AVHRR) instruments on National Oceanic and Atmospheric Administration (NOAA) satellites 17 and 18 to MODIS-Aqua for the years 2007 to 2009. While reflectances of the two MODIS instruments differ less than 2% for all channels considered, deviations of an existing AVHRR calibration from MODIS-Aqua reach −3.5 and +2.5% for the 0.8 and 1.6 μm channels, respectively.

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Agouris, Peggy, Anthony Stefanidis, and Kate Beard. "Digital Photogrammetric Techniques for Transportation Data Acquisition and Management." Transportation Research Record: Journal of the Transportation Research Board 1599, no. 1 (January 1997): 111–17. http://dx.doi.org/10.3141/1599-14.

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State-of-the-art digital photogrammetric techniques for the acquisition of transportation-related information from digital are presented. Photogrammetric data collection can be performed using either aerial or closerange sensors. The difference between the two lies on the nature of data that can be acquired, in direct analogy to the resolution differences. The current state of technology for digital imagery acquisition permits the direct capture of digital close-range imagery, whereas digital aerial imagery is produced by digitizing analog diapositives. Thus, the availability of metric quality imagery in digital format is ensured, either directly or indirectly. Advancements in digital photogrammetric research are making feasible the transition from analytical to digital photogrammetric methods in transportation applications. This transition is characterized by automation and improved performance of traditional tasks. Furthermore, the use of imagery in digital format is offering the potential to radically modify tasks, products, and procedures. Digital photogrammetric techniques can be embedded within a transportation data-management environment, supported by additional information, and supporting decision making.

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Long, C. N., J. M. Sabburg, J. Calbó, and D. Pagès. "Retrieving Cloud Characteristics from Ground-Based Daytime Color All-Sky Images." Journal of Atmospheric and Oceanic Technology 23, no. 5 (May 1, 2006): 633–52. http://dx.doi.org/10.1175/jtech1875.1.

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Abstract A discussion is presented of daytime sky imaging and techniques that may be applied to the analysis of full-color sky images to infer cloud macrophysical properties. Descriptions of two different types of sky-imaging systems developed by the authors are presented, one of which has been developed into a commercially available instrument. Retrievals of fractional sky cover from automated processing methods are compared to human retrievals, both from direct observations and visual analyses of sky images. Although some uncertainty exists in fractional sky cover retrievals from sky images, this uncertainty is no greater than that attached to human observations for the commercially available sky-imager retrievals. Thus, the application of automatic digital image processing techniques on sky images is a useful method to complement, or even replace, traditional human observations of sky cover and, potentially, cloud type. Additionally, the possibilities for inferring other cloud parameters such as cloud brokenness and solar obstruction further enhance the usefulness of sky imagers.

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Brodbeck, C., E. Sikora, D. Delaney, G. Pate, and J. Johnson. "Using Unmanned Aircraft Systems for Early Detection of Soybean Diseases." Advances in Animal Biosciences 8, no. 2 (June 1, 2017): 802–6. http://dx.doi.org/10.1017/s2040470017001315.

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As the interest in Unmanned Aerial Systems (UAS) has increased, so has the interest in the application of these systems for use in agriculture. A variety of sensors, including Multi-Spectral, Near-Infrared, Thermal, and True-Color have the potential to benefit farmers when mounted to a UAS. But as this is an emerging field, there is little data available to demonstrate their use for early detection of plant diseases in crop production. In 2016, a preliminary study was launched to examine the potential of using aerial imagery from UAS to detect diseases in soybean crops. Two irrigated fields in Alabama were selected: Experiment 1, a 50-hectare field, and Experiment 2, a 5-hectare field. Each trial consisted of replicated plots using two foliar fungicide treatments and an untreated control. Aerial imagery (multi-spectral and true-color) was collected on a biweekly basis during this study. Using multi-spectral imagery, both the Normalized Difference Vegetative Index (NDVI) and Normalized Difference Red Edge Index (NDRE) were generated and compared to direct observations in the field. Disease severity of soybean rust, charcoal rot and Cercospora leaf blight were monitored on a biweekly basis and correlated to the UAS imagery. Preliminary results indicated plant stress can be detected using UAS imagery. In Experiment 1, stress associated with charcoal rot was visible in the NDRE imagery. This was of interest because at the time of flight, while it was noted that plants were yellowing, the root and stem disease itself had not been identified by direct observation. In Experiment 2, soybean rust was observed by direct observation and in both the NDRE and NDVI imagery. Soybean rust did have a negative impact on yield in Experiment 2, however severe drought conditions may have negated the yield loss likely caused by the development of charcoal rot in Experiment 1.

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Marusenkov, V. V. "Screen Imagery as Reflected through Mythologems." Journal of Flm Arts and Film Studies 9, no. 3 (September 15, 2017): 60–69. http://dx.doi.org/10.17816/vgik9360-69.

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The article touches upon the issues concerning the mythological structures in a fiction film. It gives grounds for the thesis that by using its intrinsic means of addressing the audience cinema is able to create new image-bearing systems having a direct influence on a society.

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Kurtz, Benjamin, and Jan Kleissl. "Measuring diffuse, direct, and global irradiance using a sky imager." Solar Energy 141 (January 2017): 311–22. http://dx.doi.org/10.1016/j.solener.2016.11.032.

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Guyon, O. "A Wide Field Nulling Imager for Direct Terrestrial Exoplanets Detection." EAS Publications Series 8 (2003): 343–48. http://dx.doi.org/10.1051/eas:2003066.

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Ftaclas, Christ, Andreas L. Nonnenmacher, Richard J. Terrile, Steven H. Pravdo, George D. Gatewood, and Eugene H. Levy. "The circumstellar imager: Direct detection of extra-solar planetary systems." Astrophysics and Space Science 212, no. 1-2 (February 1994): 441–52. http://dx.doi.org/10.1007/bf00984548.

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Hossain, Ibrahim, Abbas Khosravi, Imali Hettiarachchi, and Saeid Nahavandi. "Multiclass Informative Instance Transfer Learning Framework for Motor Imagery-Based Brain-Computer Interface." Computational Intelligence and Neuroscience 2018 (2018): 1–12. http://dx.doi.org/10.1155/2018/6323414.

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A widely discussed paradigm for brain-computer interface (BCI) is the motor imagery task using noninvasive electroencephalography (EEG) modality. It often requires long training session for collecting a large amount of EEG data which makes user exhausted. One of the approaches to shorten this session is utilizing the instances from past users to train the learner for the novel user. In this work, direct transferring from past users is investigated and applied to multiclass motor imagery BCI. Then, active learning (AL) driven informative instance transfer learning has been attempted for multiclass BCI. Informative instance transfer shows better performance than direct instance transfer which reaches the benchmark using a reduced amount of training data (49% less) in cases of 6 out of 9 subjects. However, none of these methods has superior performance for all subjects in general. To get a generic transfer learning framework for BCI, an optimal ensemble of informative and direct transfer methods is designed and applied. The optimized ensemble outperforms both direct and informative transfer method for all subjects except one in BCI competition IV multiclass motor imagery dataset. It achieves the benchmark performance for 8 out of 9 subjects using average 75% less training data. Thus, the requirement of large training data for the new user is reduced to a significant amount.

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Yin, Gaohong, Gregoire Mariethoz, and Matthew McCabe. "Gap-Filling of Landsat 7 Imagery Using the Direct Sampling Method." Remote Sensing 9, no. 1 (December 27, 2016): 12. http://dx.doi.org/10.3390/rs9010012.

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Partridge, M., B. M. Hesse, and L. Müller. "A performance comparison of direct- and indirect-detection flat-panel imagers." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 484, no. 1-3 (May 2002): 351–63. http://dx.doi.org/10.1016/s0168-9002(01)02023-x.

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Date, Shota, Hiroshi Kurumadani, Tomoshi Watanabe, and Toru Sunagawa. "Transcranial direct current stimulation can enhance ability in motor imagery tasks." NeuroReport 26, no. 11 (August 2015): 613–17. http://dx.doi.org/10.1097/wnr.0000000000000398.

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BROWN, R. M., K. L. DENMAN, G. A. BORSTAD, and J. R. PARKS. "The use of satellite imagery to direct research ship sampling operations." Fisheries Oceanography 2, no. 3-4 (December 1993): 184–90. http://dx.doi.org/10.1111/j.1365-2419.1993.tb00134.x.

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Johnston, Joshua M., Martin J. Wooster, Ronan Paugam, Xianli Wang, Timothy J. Lynham, and Lynn M. Johnston. "Direct estimation of Byram's fire intensity from infrared remote sensing imagery." International Journal of Wildland Fire 26, no. 8 (2017): 668. http://dx.doi.org/10.1071/wf16178.

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Byram’s fire intensity (IB,tot; kWm–1) is one the most important and widely accepted metrics for quantifying wildfire behaviour. Calculation of IB,tot requires measurement of fuel consumption, heat of combustion and rate of spread; existing methods for obtaining these measurements are either inexact or at times impossible to obtain in the field. This paper presents and evaluates a series of remote sensing methods for directly deriving radiative fire intensity (IB,rad; kWm–1) using the Fire Radiative Power (FRP) approach applied to thermal infrared imagery of spreading vegetation fires. Comparisons between the remote sensing data and ground-sampled measurements were used to evaluate the various estimates of IB,tot, and to determine the radiative fraction (radF) of a fire’s emitted energy. Results indicate that the IB,tot along an advancing flame front can be reasonably estimated (and agrees with traditional methods of estimation (R2=0.34–0.73)) from appropriately collected time-series of remote sensing imagery without the need for ground sampling or ancillary data. We further estimate that the radF of the fire’s emitted energy varies between 0.15 and 0.20 depending on the method of calculation, which is similar to previous estimates.

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Quartarone, Angelo, Francesca Morgante, Sergio Bagnato, Vincenzo Rizzo, Antonino SantʼAngelo, Elena Aiello, Ester Reggio, Fortunato Battaglia, Corrado Messina, and Paolo Girlanda. "Long lasting effects of transcranial direct current stimulation on motor imagery." NeuroReport 15, no. 8 (June 2004): 1287–91. http://dx.doi.org/10.1097/01.wnr.0000127637.22805.7c.

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Zhao, Haitao, Bing Zhang, Changshan Wu, Zhengli Zuo, Zhengchao Chen, and Jiantao Bi. "Direct georeferencing of oblique and vertical imagery in different coordinate systems." ISPRS Journal of Photogrammetry and Remote Sensing 95 (September 2014): 122–33. http://dx.doi.org/10.1016/j.isprsjprs.2014.06.001.

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Soleh, Muchammad, Wismu Sunarmodo, and Ahmad Maryanto. "SIMULATION OF DIRECT GEOREFERENCING FOR GEOMETRIC SYSTEMATIC CORRECTION ON LSA PUSHBROOM IMAGER." International Journal of Remote Sensing and Earth Sciences (IJReSES) 14, no. 1 (June 21, 2017): 71. http://dx.doi.org/10.30536/j.ijreses.2017.v14.a2630.

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LAPAN has developed remote sensing data collection by using a pushbroom linescan imager camera sensor mounted on LSA (Lapan Surveillance Aircraft). The position accuracy and orientation system for LSA applications are required for Direct Georeferencing and depend on the accuracy of off-the-shelf integrated GPS/inertial system, which used on the camera sensor. This research aims to give the accuracy requirement of Inertial Measurement Unit (IMU) sensor and GPS to improve the accuracy of the measurement results using direct georeferencing technique. Simulations were performed to produce geodetic coordinates of longitude, latitude and altitude for each image pixel in the imager pushbroom one array detector, which has been geometrically corrected. The simulation results achieved measurement accuracies for mapping applications with Ground Sample Distance (GSD) or spatial resolution of 0,6 m of the IMU parameter (pitch, roll and yaw) errors about 0.1; 0.1; and 0.1 degree respectively, and the error of GPS parameters (longitude and latitude) about 0.00002 and 0.2 degree. The results are expected to be a reference for a systematic geometric correction to image data pushbroom linescan imager that would be obtained by using LSA spacecraft.

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Nielsen, Eric L., Michael C. Liu, Zahed Wahhaj, Beth A. Biller, Thomas L. Hayward, Laird M. Close, Bruce Macintosh, et al. "Mapping the Distributions of Exoplanet Populations with NICI and GPI." Proceedings of the International Astronomical Union 10, S314 (November 2015): 220–25. http://dx.doi.org/10.1017/s1743921315006572.

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AbstractWhile more and more long-period giant planets are discovered by direct imaging, the distribution of planets at these separations (≳5 AU) has remained largely uncertain, especially compared to planets in the inner regions of solar systems probed by RV and transit techniques. The low frequency, the detection challenges, and heterogeneous samples make determining the mass and orbit distributions of directly imaged planets at the end of a survey difficult. By utilizing Monte Carlo methods that incorporate the age, distance, and spectral type of each target, we can use all stars in the survey, not just those with detected planets, to learn about the underlying population. We have produced upper limits and direct measurements of the frequency of these planets with the most recent generation of direct imaging surveys. The Gemini NICI Planet-Finding Campaign observed 220 young, nearby stars at a median H-band contrast of 14.5 magnitudes at 1”, representing the largest, deepest search for exoplanets by the completion of the survey. The Gemini Planet Imager Exoplanet Survey is in the process of surveying 600 stars, pushing these contrasts to a few tenths of an arcsecond from the star. With the advent of large surveys (many hundreds of stars) using advanced planet-imagers we gain the ability to move beyond measuring the frequency of wide-separation giant planets and to simultaneously determine the distribution as a function of planet mass, semi-major axis, and stellar mass, and so directly test models of planet formation and evolution.

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Lagrange, Anne-Marie. "Direct imaging of exoplanets." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372, no. 2014 (April 28, 2014): 20130090. http://dx.doi.org/10.1098/rsta.2013.0090.

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Most of the exoplanets known today have been discovered by indirect techniques, based on the study of the host star radial velocity or photometric temporal variations. These detections allowed the study of the planet populations in the first 5–8 AU from the central stars and have provided precious information on the way planets form and evolve at such separations. Direct imaging on 8–10 m class telescopes allows the detection of giant planets at larger separations (currently typically more than 5–10 AU) complementing the indirect techniques. So far, only a few planets have been imaged around young stars, but each of them provides an opportunity for unique dedicated studies of their orbital, physical and atmospheric properties and sometimes also on the interaction with the ‘second-generation’, debris discs. These few detections already challenge formation theories. In this paper, I present the results of direct imaging surveys obtained so far, and what they already tell us about giant planet (GP) formation and evolution. Individual and emblematic cases are detailed; they illustrate what future instruments will routinely deliver for a much larger number of stars. I also point out the limitations of this approach, as well as the needs for further work in terms of planet formation modelling. I finally present the progress expected in direct imaging in the near future, thanks in particular to forthcoming planet imagers on 8–10 m class telescopes.

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Filacchione, Gianrico, Alessandro Frigeri, Andrea Raponi, Mauro Ciarniello, Fabrizio Capaccioni, Maria Cristina De Sanctis, Cristian Carli, et al. "Temporal evolution of the permanent shadowed regions at Mercury poles: applications for spectral detection of ices by SIMBIOSYS-VIHI on BepiColombo mission." Monthly Notices of the Royal Astronomical Society 498, no. 1 (August 26, 2020): 1308–18. http://dx.doi.org/10.1093/mnras/staa2379.

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ABSTRACT Radar observations from the Earth and multi-instrument measurements by MESSENGER mission have indicated the presence of large quantities of ices within the permanent shadowed regions (PSRs) located at Mercury poles. The detection and mapping of the distribution of volatile species on PSRs are among the primary scientific goals of the Spectrometer and IMagers for MPO Bepicolombo Integrated Observatory SYStem (SIMBIO-SYS) suite aboard ESA’s BepiColombo mission. We report about a three-steps preparatory study mainly focusing on SIMBIO-SYS/Visible and near Infrared Hyperspectral Imager (VIHI) 0.4–2.0 μm imaging spectrometer aiming (1) to render the solar illumination temporal evolution occurring on polar regions and in particular on Prokofiev and Kandinsky craters by studying the effects of shadows and penumbras caused by the finite apparent solar disc; (2) to simulate the spectral reflectance of various mixtures of average Mercury terrain and water ice in the spectral range of the VIHI imaging spectrometer channel in direct illumination, penumbra and shadowed illumination conditions; and (3) to verify the resulting VIHI signal-to-noise ratio during the different phases of the BepiColombo mission.

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Ishai, Alumit, and Dov Sagi. "Visual Imagery: Effects of Short- and Long-Term Memory." Journal of Cognitive Neuroscience 9, no. 6 (November 1997): 734–42. http://dx.doi.org/10.1162/jocn.1997.9.6.734.

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Visual imagery and perception share several functional properties and apparently share common underlying brain structures. A main approach to the scientific study of visual imagery is exploring the effects of mental imagery on perceptual processes. Previous studies have shown that visual imagery interferes with perception (Perky effect). Recently we have shown a direct facilitatory effect of visual imagery on visual perception. In an attempt to differentiate the conditions under which visual imagery interferes or facilitates visual perception, we designed new experimental paradigms, using detection tasks of a Gabor target. We found that imagery-induced interference and facilitation are memorydependent: Visual recall of common objects from long-term memory can interfere with perception, while on short-term memory tasks facilitation can be obtained. These results support the distinction between low-level and structural representations in visual memory.

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David, Prabu. "Role of Imagery in Recall of Deviant News." Journalism & Mass Communication Quarterly 73, no. 4 (December 1996): 804–20. http://dx.doi.org/10.1177/107769909607300404.

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The purpose of this paper is to examine why a deviant news story such as “Man bites dog” is more memorable than “Dog bites man.” Distinctiveness and imagery present two competing theoretical positions to explain the advantage that deviant news events have over nondeviant events. While the distinctiveness hypothesis is based on schema incongruence, the imagery hypothesis is based on Paivio's dual coding theory. Findings from two experiments support the imagery hypothesis, which suggests that imagery-evoking potential of deviant news is a better predictor of recall than schema incongruity. The advantage in recall for deviant news almost disappeared for high deviance/low imagery news events. Further, path analysis from both experiments indicates that there is no direct path between deviance and recall, but only an indirect path through imagery. In sum, this paper highlights the importance of imagery in news language and its potential impact on memory and learning.

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Jackson, B. V., P. P. Hick, A. Buffington, M. M. Bisi, and J. M. Clover. "SMEI direct, 3-D-reconstruction sky maps, and volumetric analyses, and their comparison with SOHO and STEREO observations." Annales Geophysicae 27, no. 11 (November 2, 2009): 4097–104. http://dx.doi.org/10.5194/angeo-27-4097-2009.

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Abstract. In this paper we present the results of the analysis of the late January 2007 Coronal Mass Ejection (CME) events recorded by the Solar Mass Ejection Imager (SMEI), the Solar TErrestrial RElations Observatory (STEREO), and the SOlar and Heliospheric Observatory (SOHO) spacecraft. This period occurs when the two STEREO spacecraft views are from close to Earth, and thus the views from both SMEI and the STEREO outer Heliospheric Imagers (HI-2s) coincide. Three-dimensional (3-D) analyses derived from SMEI data show many CMEs that have also been studied by others using short-term image subtractions (image-differencing techniques). During this interval we map several CME structures that are observed in both SMEI and the STEREO-A HI instruments. SMEI brightness analyses provided by short-term image subtractions ("difference images") and, alternatively, subtractions of a mean-brightness fit over a long-time duration, both show the extents of the CMEs travelling outward above the East limb that erupted from the Sun on 24 and 25 January 2007. The SMEI 3-D-reconstructions not only enhance distinct features within the CME events, but also reconcile difference-imaging results with those where a long-term base has been removed. In the January 2007 example the structure as mapped by CME difference images traces the sharp intensity gradients at the front of the CMEs; generally brighter ejected material follows behind the location of the CME front, but shows poorly in these because of its larger angular extent. Using the long-duration background removal enables SMEI's 3-D analysis to determine a mass for this CME sequence North of the ecliptic.

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Tempest, Gavin, and Gaynor Parfitt. "Imagery Use and Affective Responses During Exercise: An Examination of Cerebral Hemodynamics Using Near-Infrared Spectroscopy." Journal of Sport and Exercise Psychology 35, no. 5 (October 2013): 503–13. http://dx.doi.org/10.1123/jsep.35.5.503.

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Imagery, as a cognitive strategy, can improve affective responses during moderate-intensity exercise. The effects of imagery at higher intensities of exercise have not been examined. Further, the effect of imagery use and activity in the frontal cortex during exercise is unknown. Using a crossover design (imagery and control), activity of the frontal cortex (reflected by changes in cerebral hemodynamics using near-infrared spectroscopy) and affective responses were measured during exercise at intensities 5% above the ventilatory threshold (VT) and the respiratory compensation point (RCP). Results indicated that imagery use influenced activity of the frontal cortex and was associated with a more positive affective response at intensities above VT, but not RCP to exhaustion (p < .05). These findings provide direct neurophysiological evidence of imagery use and activity in the frontal cortex during exercise at intensities above VT that positively impact affective responses.

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Ruscher, Paul, Kevin Kloesel, Steven Graham, and Sue Hutchins. "Implementation of NOAA Direct Readout Satellite Data Capabilities in Florida's Public Schools." Bulletin of the American Meteorological Society 74, no. 5 (May 1, 1993): 849–53. http://dx.doi.org/10.1175/1520-0477-74.5.849.

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In 1992 a precollege outreach program designed to bring weather satellite imagery into the classroom was developed jointly by the Florida Technological Research and Development Authority and The Florida State University Department of Meteorology. This initiative incorporates the NOAA Direct Readout Satellite-data ingest program into Florida public school districts for the enhancement of education in a variety of curriculum areas.

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Tang, Xinming, Changru Liu, Ping Zhou, Ning Cao, FengXiang Li, and Xia Wang. "Satellite-Imagery Geometric Accuracy Improvement Based on Direct Correction of Dominant Coefficients." Photogrammetric Engineering & Remote Sensing 86, no. 4 (April 1, 2020): 215–24. http://dx.doi.org/10.14358/pers.86.4.215.

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An important and difficult point in the application of satellite imagery is refining the positioning model and improving the geometric accuracy. In this study, we focus on improvement in geometric accuracy and develop a new rational function model (RFM) refinement method. First, we derive the conversion relationship between the rigorous sensor model and the RFM, based on which we illustrate the approximate meaning of the zero-order and first-order terms of the rational polynomial coefficients (RPCs). Second, the correlation problem between RPCs and the influence of individual RPCs on geometric positioning accuracy are analyzed and verified. The dominant coefficients that determine geolocation are then identified. Finally, a new RFM refinement method based on direct correction of the dominant coefficients is proposed and validated. The experiments, conducted with ZY3-02 satellite imagery, indicate that the proposed method can effectively improve the geometric accuracy of satellite images.

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Pang, G., D. L. Lee, and J. A. Rowlands. "Investigation of a direct conversion flat panel imager for portal imaging." Medical Physics 28, no. 10 (October 2001): 2121–28. http://dx.doi.org/10.1118/1.1405844.

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Zhang, Yan, Tao Wang, Wu Fa Feng, Yong Hong Fan, and Jie Rui. "POS Supported ADS40/80 Imagery Direct Geo-Positioning and Positioning Accuracy Optimization." Advanced Materials Research 989-994 (July 2014): 3534–39. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.3534.

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On the basis of establishing direct geo-positioning model for three-line array sensor ADS40/80 images, in order to optimize the positioning accuracy, the self-calibration technology was used to update the ADS40/80 sensor imaging parameters. Moreover, the ADS40/80 camera error model and self-calibration bundle adjustment model were set up. Multi-groups of ADS40 data over the Songshan experimental field were used for direct geo-positioning and parameter updating experiments. Experimental results proved that the self-calibration adjustment technique can effectively update sensor imaging parameters and significantly improve image direct positioning accuracy.

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Rabah, M., M. Basiouny, E. Ghanem, and A. Elhadary. "Using RTK and VRS in direct geo-referencing of the UAV imagery." NRIAG Journal of Astronomy and Geophysics 7, no. 2 (December 2018): 220–26. http://dx.doi.org/10.1016/j.nrjag.2018.05.003.

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Journal articles on the topic 'Imagerie en direct'

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