Academic literature on the topic 'Snapshot images; Computer simulation'

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Journal articles on the topic "Snapshot images; Computer simulation"

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Kvitka, V. E. "Simulation and Prototyping of an Orbital Lightning Detector." Herald of the Bauman Moscow State Technical University. Series Instrument Engineering, no. 3 (132) (September 2020): 4–17. http://dx.doi.org/10.18698/0236-3933-2020-3-4-17.

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The problem of detecting lightning flashes from space is becoming more and more important as the remote sensing of Earth, climatology and atmospheric physics develop. Orbital lightning detectors are designed both in Russia and abroad. The paper considers the problem of mathematical and physical simulation of a high-speed camera designed to observe lightning flashes from onboard spacecraft in low Earth orbit. Our previous works substantiated the exterior design of the lightning detector, computed its properties and described the algorithms behind the software. In order to validate the design results, we need to prototype the instrument. We describe the main problems of detecting lightning flashes as observed from space. We show a computer simulation method producing snapshots that takes into account the interference generated by the background and the photodetector. We studied the problems of recreating the target environment during prototyping of the lightning detector, accounting for the properties of the phenomenon observed, that is, the flash spot dimensions and the ratio of the background brightness to that of the lightning. We describe the principle of comparing these two types of snapshots (taken by the prototype and synthesised by the software) and compared the results of processing the images obtained. The results matched, which allowed us to validate the snapshot processing algorithm and confirmed that the lightning detector simulation method developed is correct
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Bai, Feng, and Yi Wang. "Reduced-Order Modeling Based on Hybrid Snapshot Simulation." International Journal of Computational Methods 18, no. 01 (June 26, 2020): 2050029. http://dx.doi.org/10.1142/s0219876220500292.

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This paper presents a hybrid snapshot simulation methodology to accelerate the generation of high-quality data for proper orthogonal decomposition (POD) and reduced-order model (ROM) development. The entire span of the snapshot simulation is divided into multiple intervals, each simulated by either high-fidelity full-order model (FOM) or fast local ROM. The simulation then alternates between FOM and local ROM to accelerate snapshot data generation while maintaining the data fidelity and representation. Model switch is determined on-the-fly by evaluating several criteria that monitor the dominance of leading POD modes and ROM trajectory. The incremental singular value decomposition (iSVD) is employed to continuously update ROMs for enhanced accuracy and utilization. A global ROM broadly applicable to various online simulation is immediately available at the end of the simulation. The hybrid snapshot simulation demonstrates excellent accuracy ([Formula: see text] error) and 2.09–2.6[Formula: see text]X speedup relative to its traditional counterpart. The constructed ROMs also preserve salient accuracy ([Formula: see text] error). The results prove feasibility of the proposed method for robust and efficient snapshot data generation and ROM development.
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Zhang, Jianqi, Dorthe Posselt, Alessandro Sepe, Jan Perlich, Detlef-M. Smilgies, Andrey Rudov, Elena Patyukova, Igor Potemkin, and Christine Papadakis. "Vapor Treatment of Block Copolymer Thin Films: GISAXS and Simulations." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C877. http://dx.doi.org/10.1107/s2053273314091220.

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The structural evolution in poly(styrene-b-butadiene) (P(S-b-B)) diblock copolymer thin films during treatment with cyclohexane vapor is investigated in-situ and in real-time using grazing-incidence small-angle X-ray scattering (GISAXS) [1]. Both the swelling and the drying process are investigated. The lamellae are initially perpendicular to the film surface, i.e. the film is laterally nanostructured. Cyclohexane is a good solvent for PB and a theta solvent for PS, i.e., it is slightly selective. Using incident angles above and below the polymer critical angle, structural changes near the film surface and in the entire film are distinguished. We find that, during swelling, the initially perpendicular lamellae tilt within the film. Our computer simulations [2] show that this is due to the tendency of the copolymers to assume less stretched chain conformations, i.e. the lamellae shrink upon solvent uptake. Since long-range mass transport is not easily possible, tilting allows satisfying the space-filling condition when the lamellae are shrinking. Surface-sensitive GISAXS experiments show that, at the film surface, the lamellae eventually vanish at the expense of a thin PB wetting layer. During the subsequent drying, the perpendicular lamellae reappear at the surface, and finally, PS blocks protrude because of the solvent selectivity. By modeling the 2D GISAXS images, the time-dependent height of the protrusions can be quantitatively extracted. Figure 1. (a) 2D GISAXS images during swelling (top row) and drying (bottom row). The times after the beginning of the vapor treatment are indicated. (b) Snapshots from computer simulations of perpendicular lamellae which tilt during the film swelling. From left to right, the degree of swelling increases.
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HASHIMOTO, Junko, Akira SAKAI, Akiko JIMBO, and Toshio SAKURAI. "Computer simulation of semiconductor field ion images." SHINKU 28, no. 8 (1985): 631–35. http://dx.doi.org/10.3131/jvsj.28.631.

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SAKAI, A., J. HASHIMOTO, T. SAKURAI, K. OSAWA, and T. NINOMIYA. "COMPUTER SIMULATION OF FIELD-ION IMAGES OF QUASICRYSTALS." Le Journal de Physique Colloques 47, no. C7 (November 1986): C7–469—C7–475. http://dx.doi.org/10.1051/jphyscol:1986779.

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Che, Li, and Fengju Kang. "Exploring the efficiency of image metric for assessing the visual quality of 3D mesh model." International Journal of Modeling, Simulation, and Scientific Computing 09, no. 06 (December 2018): 1850056. http://dx.doi.org/10.1142/s1793962318500563.

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Recent developments in 3D graphics technology have led to extensive processes on 3D meshes (e.g., compression, simplification, transmission and watermarking), these processes unavoidably cause the visual perceptual degradation of the 3D objects. The existing mesh visual quality evaluation metrics either require topology constrain or fail to reflect the perceived visual quality. Meanwhile, for the 3D objects that are observed on 2D screens by the users, it is reasonable to apply image metric to assess the distortion caused by mesh simplification. We attempt to explore the efficiency of image metric for assessing the visual fidelity of the simplified 3D model in this paper. For this purpose, several latest and most effective image metrics, 2D snapshots, number and pooling algorithms are involved in our study, and finally tested on the IEETA simplification database. The statistical data allow the researcher to select the optimal parameter for this image-based mesh visual quality assessment and provide a new perspective for the design and performance assessment of mesh simplification algorithms.
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Sivkov, S. I., S. P. Simakov, and A. I. Vinokur. "Algorithms for contactless scanning of book monuments." Proceedings of SPSTL SB RAS, no. 3 (September 21, 2021): 9–15. http://dx.doi.org/10.20913/2618-7575-2021-3-9-15.

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The article is devoted to the questions of cultural heritage preservation by creating the digital collection of book monuments. The original documents are monuments of book culture and their dilapidated state requires careful handling, splitting of documents for scanning is extremely undesirable. The market does not present the equipment for contactless scanning of books without embroidering, therefore an algorithm that allows digitalizing book monuments in a contactless way has been developed. The technique has been constructed using an algorithm based on the projection of the light grid on the object scanned. The authors propose a sequence of actions consisting of image processing and comparing the results between two images. The first snapshot determines the initial parameters of the grid; the second snapshot determines the actual distortion of the test snapshot. Subsequent mathematical processing allows getting scanned images without absence of geometric distortions of the scanned page due to the system of using the two-dimensional array of corrections. The application of the system has been modeled on the example of «The legend of the destruction of Siberian cities of Tara and Tyumen by the lesser Tatars / / Collection of moral stories, words, lives and other articles [hand.]». The evaluation parameters of the simulation result have been the following: text distinctness, absence of geometric distortions, color quality, uniformity of document scanning quality within a single book, etc., as checked and recognized as high by the experts.The experience described opens possibilities of book monuments digitization using the new algorithm. The development of the system is aimed at expanding the database of objects of material culture to be digitized, perfecting the software, improving the quality of digital images, as well as the capabilities of image recognition and search for the document itself and information it contains.
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Łukaszewski, A., and A. Szczepkowicz. "Computer simulation of FIM images – the convex hull model." Vacuum 54, no. 1-4 (July 1999): 67–71. http://dx.doi.org/10.1016/s0042-207x(98)00437-0.

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Bashiri-Bawil, Mahdi, Sara Rahavi-Ezabadi, Mohammad Sadeghi, Reza A. Zoroofi, and Amin Amali. "Preoperative Computer Simulation in Rhinoplasty Using Previous Postoperative Images." Facial Plastic Surgery & Aesthetic Medicine 22, no. 6 (December 1, 2020): 406–11. http://dx.doi.org/10.1089/fpsam.2019.0016.

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Kalitov, M. A., and N. P. Kornyshev. "Computer simulation of the formation of digital spectrozonal images." Journal of Physics: Conference Series 1352 (October 2019): 012025. http://dx.doi.org/10.1088/1742-6596/1352/1/012025.

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Dissertations / Theses on the topic "Snapshot images; Computer simulation"

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

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Tsang, Kin Ting. "Interactive 3D model reconstruction from images and quasi-dense points /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?COMP%202004%20TSANG.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2004.
Includes bibliographical references (leaves 59-62). Also available in electronic version. Access restricted to campus users.
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Corby, Ralph Stephen. "Advances in static imaging using induced current electrical impedance tomography." Thesis, University of Sheffield, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310813.

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Debunne, Gilles. "Animation multirésolution d'objets déformables en temps-réel : application à la simulation chirurgicale." Phd thesis, Grenoble INPG, 2000. http://tel.archives-ouvertes.fr/tel-00006740.

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L'animation de scènes virtuelles en synthèse d'images est une technique maîtrisée, largement utilisée pour les effets spéciaux cinématographiques et les jeux vidéos. Elle se limite toutefois la plupart du temps à l'animation manuelle d'objets rigides. Cette thèse se propose de chercher à générer automatiquement les déformations d'un objet mou, qui plus est en temps-réel. L'application visée est la création d'un simulateur chirurgical d'opérations minimalement invasives destiné à terme à la formation des chirurgiens. Les méthodes actuelles ne permettent pas d'obtenir à la fois un réalisme visuel satisfaisant et une animation en temps-réel. Pour y parvenir nous avons utilisé les lois de l'élasticité linéaire qui garantissent le réalisme de l'animation et assurent qu'un même comportement de l'objet sera approché, quelle que soit la finesse de la discrétisation. Nous proposons alors une méthode de simulation multirésolution, qui adapte automatiquement en fonction de la simulation, pour chaque zone de l'objet, la précision des calculs pour obtenir un compromis entre une simulation grossière et très rapide ou au contraire une animation plus précise utilisant davantage de points. La partie de l'organe proche de l'outil manipulé par l'utilisateur sera ainsi animée avec une grande précision, qui diminuera dans les régions lointaines, moins importantes visuellement. Ces travaux ont abouti à la réalisation d'un prototype de simulateur chirurgical offrant une animation en temps-réel grâce à l'utilisation de la multirésolution. Le réalisme est accru par l'utilisation d'un dispositif à retour d'effort simulant la résistance de l'organe à la déformation, calculée grâce au modèle physique interne.
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Shtuka, Arben. "Simulation, traitement et visualisation des images numériques : apport du codage par indicatrice en géostatistique." Vandoeuvre-les-Nancy, INPL, 1994. http://www.theses.fr/1994INPL139N.

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La thèse se compose de trois parties. La première partie est consacrée à une nouvelle méthode d'interpolation des champs vectoriels utilisant les moindres carrés a l'aide des polynômes orthogonaux. Cette méthode a été appliquée à la modélisation des trajectoires de forage de deux gisements en Albanie. La seconde partie concerne les méthodes géostatistiques d'estimation à l'aide des indicatrices. Les méthodes conventionnelles d'interpolation (krigeage des indicatrices) sont difficilement utilisables et nécessitent une connaissance préalable des fonctions de covariances pour chaque valeur de coupure. Étant donné ces difficultés, deux stratégies ont été suivies. La première consiste à construire un modèle général des fonctions de covariances des indicatrices en s'appuyant sur les propriétés spectrales. La seconde stratégie consiste a utiliser une autre méthode d'interpolation des indicatrices à l'aide de DSI(discrete smooth interpolation). Cette méthode a beaucoup d'avantages par rapport aux méthodes classiques: rapidité, simplicité et surtout respect des contraintes nécessaires pour que les indicatrices interpolées soient une estimation de la répartition locale. La dernière partie est consacrée aux traitements et a l'analyse d'images numériques. L'utilisation de plus en plus fréquente d'images numériques en géosciences a conduit au développement d'un logiciel spécifique IMEGEO (images géologiques). Le logiciel a été conçu selon les principes suivants: portabilité, interactivité, modularité et configuration systeme minimal. Dans sa version initiale, IMGEO était un outil de visualisation des images en deux dimensions, actuellement il représente un logiciel plus complet contenant des modules d'analyse
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Samuel, Émilie. "Recherche de motifs dans des images : apport des graphes plans." Phd thesis, Université Jean Monnet - Saint-Etienne, 2011. http://tel.archives-ouvertes.fr/tel-00630439.

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La reconnaissance de formes s'intéresse à la détection automatique de motifs dans des données d'entrée, afin de pouvoir, par exemple, les classer en catégories. La matière première de ces techniques est bien souvent l'image numérique. Cette dernière, dans sa forme la plus courante, est codée sous la forme d'une matrice de pixels. Néanmoins, la question du développement de représentations plus riches se pose. Ainsi, la structuration de l'information contenue dans l'image devrait permettre la mise en évidence des différents objets représentés, et des liens les unissant. C'est pourquoi nous proposons de modéliser les images numériques sous forme de graphes, pour leur richesse et expressivité d'une part, et pour exploiter les résultats de la théorie des graphes en reconnaissance de formes d'autre part. Nous développons pour cela une méthode d'extraction de graphes plans à partir d'images, basée sur le respect de la sémantique. Nous montrons que nous pouvons, étant donné un graphe, reconstruire avec perte limitée l'image d'origine. Par la suite, nous introduisons les graphes plans à trous, graphes dont les faces peuvent être visibles ou invisibles. Leur justification trouve sa place dans la recherche de motifs notamment, pour laquelle les éléments constituant l'arrière plan d'une image ne doivent pas être retrouvés. En dirigeant notre attention sur la planarité de ces graphes, nous proposons des algorithmes polynomiaux d'isomorphisme de graphes plans et de motifs ; nous traitons également leur équivalence, qui se trouve être un isomorphisme aux faces invisibles près.
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Robertson, Paul. "A self adaptive architecture for image understanding." Thesis, University of Oxford, 2001. http://ora.ox.ac.uk/objects/uuid:01f16b87-63be-4b55-9e52-14738fefed57.

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This thesis develops a self-adaptive architecture for image understanding that addresses certain kinds of lack of robustness common in image understanding programs. The architecture provides support for making image understanding programs that can manipulate their own semantics and thereby adjust their structure in response to changes in the environment that might cause static image understanding systems to fail. The general approach taken has been to explore the ideas of self-adaptive software and implement an architectural framework that addresses a class of problems that we term "interpretation problems" common in image understanding. Self-adaptive software is a relatively new idea and this thesis represents one of the first implementations of the general idea. The general idea is that to make programs robust to changing environmen- tal conditions that they should be "aware" of their relationship with the environment and be able to restructure themselves at runtime in order to "track" changes in the environment. The implementation takes the form of a multi-layered reflective interpreter that ma- nipulates and runs simple agents. The interpreter framework utilizes Monte-Carlo sam- pling as a mechanism for estimating most likely solutions, uses Minimum Descriptin Length (MDL) as a central coordinating device, and includes a theorem prover based compiler to restructure the program when necessary. To test the architectural ideas developed in the thesis a test domain of interpreting aerial images was chosen. Much of the research described in the thesis addresses issues in that problem domain. The task of the program is to segment, label, and parse aerial images so as to produce an image description similar to descriptions produced by a human expert. An image corpus is developed that is used as the source of domain knowledge. The first processing stage of the program segments the aerial images into segments similar to those found in the annotated corpus. To accomplish this a new segmentation algorithm that we call semantic segmentation was developed that not only used MDL as a principle to drive the low-level segmentation but also allows higher level semantics to influence the segmentation. In our usage of the algorithm those semantics take the form of labeling and parsing the resulting segmentation. The second stage labels the regions and parses the regions into a parse tree. To do this we develop a 2D statistical parser. Rules of grammar are induced from the corpus and an MDL parser finds approximations to the most probable parse of the regions of the segmented image.
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Nezan, Jean François. "Prototypage rapide d'applications de traitement des images sur systèmes embarqués." Habilitation à diriger des recherches, Université Rennes 1, 2009. http://tel.archives-ouvertes.fr/tel-00564516.

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les travaux de recherche de Jean-François Nezan s'inscrivent dans le cadre général des méthodes et outils d'aide à la conception de systèmes embarqués. Plus particulièrement, les travaux présentés visent les systèmes électroniques constitués de plusieurs processeurs (MPSoC) et dédiés aux applications de compression/décompression vidéo. L'approche choisie se situe dans le cadre AAA (Adéquation Algorithme Architecture) qui utilise des modèles de descriptions haut-niveau des algorithmes et des architectures parallèles pour automatiser les processus de placement/ordonnancement et pour générer un code optimisé. La présentation montrera les apports à cette problématique issus des travaux encadrés par Jean-François Nezan, précisera également la manière dont ces travaux distincts s'intègrent dans un processus de développement cohérent et évolutif, et enfin donnera les perspectives attendues dans les années à venir.
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Aubert, Didier. "Mise en correspondance d'indices images en résolutions multiples." Phd thesis, Grenoble INPG, 1989. http://tel.archives-ouvertes.fr/tel-00332349.

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Garbay, Catherine. "Images, stratégies perceptives et stratégies cognitives d'analyse." Habilitation à diriger des recherches, Grenoble 1, 1986. http://tel.archives-ouvertes.fr/tel-00320009.

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L'objectif est le développement de systèmes susceptibles d'appréhender et de rendre accessibles des données cohérentes vis à vis des références humaines d'appréciaciation des images. Une présentation des formes iconiques d'expression des unités observées et de leur signification fonctionnelle est ainsi effectuée, et suivie d'une systhèse des modes humains de perception et d'interprétation des images. Parallèlement à ceci, un chapitre est consacré à l'investigation des moyens informatiques de représentation et d'analyse d'images, et à leurs limites. La confrontation de ces différents éléments conduit à envisager la prise en compte de connaissances spécifiques du domaine d'application, à approfondir leur forme de représentation et à étudier les stratégies possibles de leur exploitation. Les concepts introduits sont illustrés par leur application à la segmentation d'images cytologiques et à l'interprétation d'images histologiques (diagnostic du cancer du sein).
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Books on the topic "Snapshot images; Computer simulation"

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Bahl, Rajendar. Computer model of a high-resolution imaging sonar. Monterey, Calif: Naval Postgraduate School, 1990.

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Myszkowski, K. Efficient and predictive realistic image synthesis. Warszawa: Oficyna Wydawn. Politechniki Warszawskiej, 2001.

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Commission on Preservation and Access., ed. Computer images for research, teaching, and publication in art history and related disciplines. Washington, DC: Commission on Preservation & Access, 1996.

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Pu, Shi. Knowledge based building facade reconstruction from laser point clouds and images. Delft: Netherlands Geodetic Commission, 2010.

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Shah, Tahir Rabbani. Automatic reconstruction of industrial installations using point clouds and images. Delft: Nederlandse Commissie voor Geodesie, 2006.

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Baranoski, Gladimir Valerio Guimarães. Light interaction with plants: A computer graphics perspective. Chichester: Horwood Pub., 2004.

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1967-, Bekaert Philippe, and Bala Kavita 1971-, eds. Advanced global illumination. Natick, MA: AK Peters, 2003.

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Reality, International Workshop on Medical Imaging and Augmented. Internatinoal Workshop on Medical Imaging and Augumented Reality: Proceedings : 10-12 June, 2001, Shatin, N.T., Hong Kong. Los Alamitos, California: IEEE Computer Society, 2001.

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Kerr, Andrew Thomas. Computer simulation studies of ultrasound doppler color flow images. 1992.

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William, Krakow, O'Keefe Michael, ASM/MSD Computer Simulation Committee., and Minerals, Metals and Materials Society. Meeting, eds. Computer simulation of electron microscope diffraction and images: Proceedings of a topical symposium on computer simulation of electron microscope diffraction and images. Warrendale, Pa: TMS, 1989.

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Book chapters on the topic "Snapshot images; Computer simulation"

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Winkens, Christian, Volkmar Kobelt, and Dietrich Paulus. "Robust Features for Snapshot Hyperspectral Terrain-Classification." In Computer Analysis of Images and Patterns, 16–27. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-64689-3_2.

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Houle, J. L., and L. Richardson. "A Graphics Interface for Interactive Simulation of Packet-Switched Networks." In Computer-Generated Images, 411–18. Tokyo: Springer Japan, 1985. http://dx.doi.org/10.1007/978-4-431-68033-8_36.

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Ramírez, Misael Dario Rosales, Petia Radeva Ivanova, Josepa Mauri, and Oriol Pujol. "Simulation Model of Intravascular Ultrasound Images." In Medical Image Computing and Computer-Assisted Intervention – MICCAI 2004, 200–207. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30136-3_26.

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Zacher, Andrzej. "Numerical Simulation of Endoscopic Images in Photodynamic Diagnosis." In Computer Vision and Graphics, 333–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02345-3_33.

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Sinthanayothin, Chanjira, and Suthee Phoojaruenchanachai. "Multimedia Simulation of Colour Blindness and Colour Enhancement Assisted Colour Blindness." In Computer Analysis of Images and Patterns, 270–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-45179-2_34.

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Kolesnik, Marina, and Gerhard Paar. "Algorithmic solution and simulation results for vision-based autonomous mode of a planetary rover." In Computer Analysis of Images and Patterns, 677–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/3-540-63460-6_178.

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Schenk, Fabian, Matthias Rüther, and Horst Bischof. "Automated Walkable Area Segmentation from Aerial Images for Evacuation Simulation." In Communications in Computer and Information Science, 89–108. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62618-5_6.

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Singh, Prerna, Ramakrishnan Mukundan, and Rex de Ryke. "Modelling, Speckle Simulation and Quality Evaluation of Synthetic Ultrasound Images." In Communications in Computer and Information Science, 74–85. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60964-5_7.

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Shams, Ramtin, Richard Hartley, and Nassir Navab. "Real-Time Simulation of Medical Ultrasound from CT Images." In Medical Image Computing and Computer-Assisted Intervention – MICCAI 2008, 734–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-85990-1_88.

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Liew, Lee Hung, Beng Yong Lee, Yin Chai Wang, and Wai Shiang Cheah. "Simulation Study on Distribution of Control Points for Aerial Images Rectification." In Computer Science and its Applications, 169–77. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5699-1_18.

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Conference papers on the topic "Snapshot images; Computer simulation"

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Miao, Xin, Xin Yuan, Yunchen Pu, and Vassilis Athitsos. "lambda-Net: Reconstruct Hyperspectral Images From a Snapshot Measurement." In 2019 IEEE/CVF International Conference on Computer Vision (ICCV). IEEE, 2019. http://dx.doi.org/10.1109/iccv.2019.00416.

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Wildani, Avani, Ian F. Adams, and Ethan L. Miller. "Single-Snapshot File System Analysis." In 2013 IEEE 21st International Symposium on Modelling, Analysis & Simulation of Computer and Telecommunication Systems (MASCOTS). IEEE, 2013. http://dx.doi.org/10.1109/mascots.2013.47.

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Hsu, Tzu-Sheng Shane, Timothy Fitzgerald, Vincent Phuc Nguyen, and Balakumar Balachandran. "Large Motion Visualization and Estimation for Fluid-Structure Simulations." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46239.

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Studies of fluid-structure interactions associated with flexible structures such as flapping wings require the capture and quantification of large motions of bodies that may be opaque. As a case study, motion capture of a free flying insect is considered by using three synchronized high-speed cameras. A solid finite element (FE) representation is used as a reference body and successive snapshots in time of the displacement fields are reconstructed via an optimization procedure. One of the original aspects of this work is the formulation of an objective function and the use of shadow matching and strain-energy regularization. With this objective function, the authors penalize the shape differences between silhouettes of the captured images and the FE representation of the deformed body. A similar method with a three-dimensional voxel cloud (VC) reconstruction is also illustrated. Challenges faced in implementing the VC method are discussed and the current computational implementation will also be covered.
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Nefedev, Konstantin V., and Ekaterina A. Kudrina. "Computer simulation of nanodot Mfm-images." In 2014 Tenth International Vacuum Electron Sources Conference (IVESC). IEEE, 2014. http://dx.doi.org/10.1109/ivesc.2014.6892044.

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Metter, Richard V., Peter L. Dillon, Kenneth E. Huff, and Majid Rabbani. "Computer Simulation Of Radiographic Screen-Film Images." In Application of Optical Instrumentation in Medicine XIV and Picture Archiving and Communication Systems (PACS IV) for Medical Applications, edited by Samuel J. Dwyer III and Roger H. Schneider. SPIE, 1986. http://dx.doi.org/10.1117/12.975380.

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"SYNTHESIZING FACE IMAGES BY IRIS REPLACEMENT: STRABISMUS SIMULATION." In International Conference on Computer Vision Theory and Applications. SciTePress - Science and and Technology Publications, 2006. http://dx.doi.org/10.5220/0001376900410047.

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Picci, Giorgio, and Francesca Carli. "Modelling and Simulation of Images by Reciprocal Processes." In Tenth International Conference on Computer Modeling and Simulation (uksim 2008). IEEE, 2008. http://dx.doi.org/10.1109/uksim.2008.49.

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Innamorati, Carlo, Bryan Russell, Danny Kaufman, and Niloy Mitra. "Neural Re-Simulation for Generating Bounces in Single Images." In 2019 IEEE/CVF International Conference on Computer Vision (ICCV). IEEE, 2019. http://dx.doi.org/10.1109/iccv.2019.00881.

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Kristiansen, Trygve, Rolf Baarholm, Geir J. Ro̸rtveit, Ernst W. Hansen, and Carl Trygve Stansberg. "Kinematics in a Diffracted Wave Field: Particle Image Velocimetry (PIV) and Numerical Models." In ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2005. http://dx.doi.org/10.1115/omae2005-67176.

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As the use of CFD in industrial applications increases, so does the need for verification and validation of the theoretical/numerical results. This paper focuses on tools for validation and in particular, on the use of Particle Imaging Velocimetry (PIV) as such a tool. Diffraction of regular waves due to a single, fixed vertical cylinder is investigated. Theoretical results of wave run-up and wave kinematics are compared to measurements from model tests. Theoretical results are obtained by second order potential theory and by fully non-linear CFD computations. The second order potential theory frequency-domain results are computed by the industry standard code WAMIT, while the fully nonlinear time-domain simulations are performed by the commercial CFD code Flow-3D. Measurements are obtained by means of wave probes, PIV and snapshots taken with a high-speed camera. The experiments are made with the model in place as well as without the model, for validation of the incident flow field. For the identification of non-linear effects, the steepness of the waves is varied. The surface elevation is measured by means of the wave probes, while the PIV equipment measures the kinematics. High quality photos taken by the high-speed camera give a detailed overview of the surface elevation for inspection. In addition to focusing on validation tools, the paper also addresses some critical aspects associated with the CFD computations, such as the modeling of boundary conditions. The work is based partly upon results from the WaveLand JIP, Phase 2.
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Marques, Marcio A., Annie F. Frere, Henrique J. Q. de Oliveira, Homero Schiabel, Paulo M. Azevedo Marques, Ricardo J. Ferrari, and Aledir S. Pereira. "Computer simulation of the geometric unsharpness effect on radiologic images." In SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, edited by Andrew G. Tescher. SPIE, 1996. http://dx.doi.org/10.1117/12.258274.

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Reports on the topic "Snapshot images; Computer simulation"

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Bobashev, Georgiy, John Holloway, Eric Solano, and Boris Gutkin. A Control Theory Model of Smoking. RTI Press, June 2017. http://dx.doi.org/10.3768/rtipress.2017.op.0040.1706.

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We present a heuristic control theory model that describes smoking under restricted and unrestricted access to cigarettes. The model is based on the allostasis theory and uses a formal representation of a multiscale opponent process. The model simulates smoking behavior of an individual and produces both short-term (“loading up” after not smoking for a while) and long-term smoking patterns (e.g., gradual transition from a few cigarettes to one pack a day). By introducing a formal representation of withdrawal- and craving-like processes, the model produces gradual increases over time in withdrawal- and craving-like signals associated with abstinence and shows that after 3 months of abstinence, craving disappears. The model was programmed as a computer application allowing users to select simulation scenarios. The application links images of brain regions that are activated during the binge/intoxication, withdrawal, or craving with corresponding simulated states. The model was calibrated to represent smoking patterns described in peer-reviewed literature; however, it is generic enough to be adapted to other drugs, including cocaine and opioids. Although the model does not mechanistically describe specific neurobiological processes, it can be useful in prevention and treatment practices as an illustration of drug-using behaviors and expected dynamics of withdrawal and craving during abstinence.
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