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Dissertations / Theses on the topic 'Occluded'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Brough, Vivienne. "Affects of ekstasis in surrealism's occluded practices." Thesis, University of Essex, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558815.

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This study proposes that there exists a coherent alternative strand of surrealist praxis evident in works produced by certain international surrealists and ex-surrealists: this strand is seen to be marked by a presentation of the affects of ekstasis. This proposition is examined in relation to three differentiated international prose works. This spectrum of responses is charted through the novels, Zenobia (1985, En. ed. 1995) by the Romanian Gellu Naum, Le Cornet acoustique (The Hearing Trumpet) (1974, En. ed. 1976) by the British expatriate Leonora Carrington, and Los pasos perdidos (The Lost Steps) (1953, En. ed. 1956) by the Cuban Alejo Carpentier. The expressions of sacred ecstasy present in the novels are analysed using the theory of sociologie sacree (sacred sociology) developed by the dissident surrealists Georges Bataille and Roger Caillois in the College de Sociologie (1937-39) and through Bataille's concepts of sacred ecstasy and inner experience. Following Emile Durkheim's directive to examine ecstasy only in reference to the ancient Greek concept of ekstasis however, I have recourse to Plato's Socratic dialogue Phaedrus to provide an image of ekstasis upon which to base the analysis of the literary texts. This analysis will be complemented by the work of Mircea Eliade, the historian of religions. The particular geo-social histories of these 'penumbral' surrealisms highlight the impact of Parisian surrealism on local cultures, and the impact that local political or cultural oppression has had upon the development of international surrealism. On the one hand, this study provides a new insight from which to comprehend international surrealism in the context of dissident surrealism, adding to site-specific critical work on the field. On the other, it provides a new way of reading the unique contributions of each author to surrealism and of the commonalities that bind these disparate surrealist expressions together.
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2

Rathje, Jason M. "Human-automation collaboration in occluded trajectory smoothing." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59690.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2010.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 133-134).
Deciding if and what objects should be engaged in a Ballistic Missile Defense System (BMDS) scenario involves a number of complex issues. The system is large and the timelines may be on the order of a few minutes, which drives designers to highly automate these systems. On the other hand, the critical nature of BMD engagement decisions suggests exploring a human-in-the-loop (HIL) approach to allow for judgment and knowledge-based decisions, which provide for potential automated system override decisions. This BMDS problem is reflective of the role allocation conundrum faced in many supervisory control systems, which is how to determine which functions should be mutually exclusive and which should be collaborative. Clearly there are some tasks that are too computationally intensive for human assistance, while other tasks may be completed without automation. Between the extremes are a number of cases in which degrees of collaboration between the human and computer are possible. This thesis motivates and outlines two experiments that quantitatively investigate human/automation tradeoffs in the specific domain of tracking problems. Human participants in both experiments were tested in their ability to smooth trajectories in different scenarios. In the first experiment, they clearly demonstrated an ability to assist the algorithm in more difficult, shorter timeline scenarios. The second experiment combined the strengths of both human and automation to create a human-augmented system. Comparison of the augmented system to the algorithm showed that adjusting the criterion for having human participation could significantly alter the solution. The appropriate criterion would be specific to each application of this augmented system. Future work should be focused on further examination of appropriate criteria.
by Jason M. Rathje.
S.M.
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3

Young, Jeffry R. (Jeffry Ray). "Children's ability to recognize visually occluded stimuli." Thesis, North Texas State University, 1985. https://digital.library.unt.edu/ark:/67531/metadc798056/.

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The purpose of this research was to study children's ability to recognize partially occluded images. Tasks were constructed which consisted of occluded images from video games, trademarks, and household objects. The tasks were administered to third and sixth grade students at two elementary schools in Arlington, Texas. The researcher discovered no significant differences between the scores of males and females except for the males' higher score on the video game task .
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4

Andersson, Peter. "Model based object finding in occluded cluttered environments." Thesis, Umeå University, Department of Computing Science, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-36524.

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The aim of the thesis is object finding in occluded and cluttered environment using computer vision techniques and robot motion. Difficulties of the object finding are 1. finding objects at hidden area and 2. finding unrecognized objects. For solving the difficulties, two methods were developed, one is for finding objects in occluded cluttered environments using model based object finding and the other to increase the robustness in object finding by identifying known objects that are unidentified. The goal was to search occluded areas with the bumblebee2 stereo camera to be able to identify all known objects in the environment by removing all visible known objects To identify known objects SURF [9] was used and to be able to remove the identified objects their location first needed to be localized. To localize the object‘s x and y coordinate the information from SURF [9] was used, and the distance coordinate z is calculated using the depth image from the stereo camera. The method to identify objects the SURF [9] algorithm had missed to identify uses a method to find unknown segments in the environment. By using a push motion on the segments to change their angle it can remove possible light reflections and the object can be identified. The results of this research show that the method can find objects in occluded cluttered areas and it can also identified missed known objects.

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5

阮邦志 and Pong-chi Yuen. "Recognition of occluded objects: a dominant point approach." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1993. http://hub.hku.hk/bib/B31233375.

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6

Yuen, Pong-chi. "Recognition of occluded objects : a dominant point approach /." [Hong Kong : University of Hong Kong], 1993. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13437574.

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7

Luo, Dexiang. "Occluded object discrimination by a modified Hopfield neural network." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0020/MQ55520.pdf.

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8

Plomp, Gus. "Amodal completion of partly occluded figures : what context uncovers." Thesis, University of Sunderland, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.416514.

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9

Griffin, Kawanza L. "Vasorelaxation after exercise training in chronic coronary occluded hearts." free to MU campus, to others for purchase, 1999. http://wwwlib.umi.com/cr/mo/fullcit?p9962526.

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10

Smith, David. "Parallel approximate string matching applied to occluded object recognition." PDXScholar, 1987. https://pdxscholar.library.pdx.edu/open_access_etds/3724.

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This thesis develops an algorithm for approximate string matching and applies it to the problem of partially occluded object recognition. The algorithm measures the similarity of differing strings by scanning for matching substrings between strings. The length and number of matching substrings determines the amount of similarity. A classification algorithm is developed using the approximate string matching algorithm for the identification and classification of objects. A previously developed method of shape description is used for object representation.
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11

Gredebäck, Gustaf. "Infants’ Knowledge of Occluded Objects: Evidence of Early Spatiotemporal Representations." Doctoral thesis, Uppsala University, Department of Psychology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4058.

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This thesis demonstrates that infants represent temporarily non-visible, or occluded, objects. From 4 months of age, infants could accurately predict the reappearance of a moving object after 660 ms of non visibility; indicating accurate spatiotemporal representations. At this age predictions were dominated by associations between specific events and outcomes (associative rules). Between 6 and 8 months of age predictions became dominated by extrapolations (Study III). From 6 months infants could represent occluded objects for up to 4 seconds. The number of successful predictions decreased, however, if the information contained in the occlusion event diminished (time of accretion and deletion). As infants grew older (up to 12 months) they produced more accurate predictions. (Study II). The similarities between adult and infant performances were numerous (Study I). These conclusion are based on one cross sectional (Study I) and two longitudinal studies (Study II & III) in which an object, a ‘happy face’, moved on circular (Study I, II, & III) and other complex trajectories (Study III). One portion of each trajectory was covered by a screen that blocked the object from sight. In each study participants gaze were recorded with an infrared eye tracking system (ASL 504) and a magnetic head tracker (Flock of Birds). This data was combined with data from the stimulus and stored for of line analysis.

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12

Gredebäck, Gustaf. "Infants? Knowledge of Occluded Objects: Evidence of Early Spatiotemporal Representations /." Uppsala : Acta Universitatis Upsaliensis, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4058.

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13

Cutting, Graham Russell. "An ESR study of the radicals occluded during emulsion polymerisations." Thesis, Lancaster University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360617.

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14

Ablavsky, Vitaly. "Layered graphical models for tracking partially-occluded moving objects in video." Thesis, Boston University, 2011. https://hdl.handle.net/2144/34416.

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Thesis (Ph.D.)--Boston University
PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.
Tracking multiple targets using fixed cameras with non-overlapping views is a challenging problem. One of the challenges is predicting and tracking through occlusions caused by other targets or by fixed objects in the scene. Considerable effort has been devoted toward developing appearance models that are robust to partial occlusions, tracking algorithms that cope with short-term loss of observations, and algorithms that learn static occlusion maps. In t his thesis we consider scenarios where it is impossible to learn a static occlusion map. This is often the case when the scene consists of both people and large objects whose position is not permanently fixed. These objects may enter, leave or relocate within the scene during a short time span. We call such objects "relocatable objects" or "relocatable occluders." We develop a representation for scenes containing relocatable objects that can cause partial occlusions of people in a camera's field of view. In many practical applications, relocatable objects tend to appear often; therefore, models for them can be learned offline and stored in a database. We formulate an occluder-centric representation, called a graphical model layer, where a person's motion in the ground plane is defined as a first-order Markov process on activity zones, while image evidence is aggregated in 2D observation regions that are depth-ordered with respect to the occlusion mask of the relocatable object. We represent real-world scenes as a composition of depth-ordered, interacting graphical model layers, and account for image evidence in a way that handles mutual overlap of the observation regions and their occlusions by the relocatable objects. These layers interact: proximate ground plane zones of different model instances are linked to allow a person to move between the layers, and image evidence is shared between the observation regions of these models. We demonstrate our formulation in tracking low-resolution, partially-occluded pedestrians in the vicinity of parked vehicles. In these scenarios some tracking formulations that rely on part-based person detectors may fail completely. Our pedestrian tracker fares well and compares favorably with the state-of-the-art pedestrian detectors- lowering false positives by twenty-nine percent and false negatives by forty-two percent-and a deformable-contour-based tracker.
2031-01-01
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15

Tamang, Sujan. "Empirical Evaluation of AdaBoost Method in Detecting Transparent and Occluded Objects." Youngstown State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1527599823503772.

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16

Berisha, F. "Photorealistic retrieval of occluded facial information using a performance-driven face model." Thesis, University College London (University of London), 2009. http://discovery.ucl.ac.uk/14673/.

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Facial occlusions can cause both human observers and computer algorithms to fail in a variety of important tasks such as facial action analysis and expression classification. This is because the missing information is not reconstructed accurately enough for the purpose of the task in hand. Most current computer methods that are used to tackle this problem implement complex three-dimensional polygonal face models that are generally timeconsuming to produce and unsuitable for photorealistic reconstruction of missing facial features and behaviour. In this thesis, an image-based approach is adopted to solve the occlusion problem. A dynamic computer model of the face is used to retrieve the occluded facial information from the driver faces. The model consists of a set of orthogonal basis actions obtained by application of principal component analysis (PCA) on image changes and motion fields extracted from a sequence of natural facial motion (Cowe 2003). Examples of occlusion affected facial behaviour can then be projected onto the model to compute coefficients of the basis actions and thus produce photorealistic performance-driven animations. Visual inspection shows that the PCA face model recovers aspects of expressions in those areas occluded in the driver sequence, but the expression is generally muted. To further investigate this finding, a database of test sequences affected by a considerable set of artificial and natural occlusions is created. A number of suitable metrics is developed to measure the accuracy of the reconstructions. Regions of the face that are most important for performance-driven mimicry and that seem to carry the best information about global facial configurations are revealed using Bubbles, thus in effect identifying facial areas that are most sensitive to occlusions. Recovery of occluded facial information is enhanced by applying an appropriate scaling factor to the respective coefficients of the basis actions obtained by PCA. This method improves the reconstruction of the facial actions emanating from the occluded areas of the face. However, due to the fact that PCA produces bases that encode composite, correlated actions, such an enhancement also tends to affect actions in non-occluded areas of the face. To avoid this, more localised controls for facial actions are produced using independent component analysis (ICA). Simple projection of the data onto an ICA model is not viable due to the non-orthogonality of the extracted bases. Thus occlusion-affected mimicry is first generated using the PCA model and then enhanced by accordingly manipulating the independent components that are subsequently extracted from the mimicry. This combination of methods yields significant improvements and results in photorealistic reconstructions of occluded facial actions.
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17

Reid, James F. "Sequential and parallel algorithms for decomposing partially occluded one and two-dimensional texts." Thesis, King's College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368886.

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18

Andreu, Cabedo Yasmina. "Face gender classification under realistic conditions. Dealing with neutral, expressive and partially occluded faces." Doctoral thesis, Universitat Jaume I, 2014. http://hdl.handle.net/10803/669061.

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Esta tesis se centra en la clasificación de género a partir de imágenes faciales tratando el problema con un enfoque más realista que el tradicionalmente utilizado en la literatura. En entornos reales, pueden surgir varios problemas debido a la falta de control sobre los sujetos y su entorno. Además es probable que las características de los individuos, como son su edad y raza, varíen significativamente. Al mismo tiempo, los sujetos pueden manifestar sus emociones mediante expresiones faciales así como llevar puestos complementos que cubran partes de su cara, lo cual provoca que las imágenes faciales contengan ciertas distorsiones. Estos son los principales problemas, junto con otras complicaciones como las causadas por cambios de iluminación y detecciones imprecisas de la cara, que abordamos en este trabajo. Comenzamos estudiando la posibilidad de clasificar el género dadas partes de la cara, como son los ojos, la nariz, la boca y el mentón. A partir de los resultados experimentales que se obtuvieron utilizando dos bases de datos de imágenes faciales, concluimos que los ojos eran la región de la cara que proporcionaba resultados más robustos y que distintas partes de la cara contienen información complementaria sobre el género de la persona. Seguidamente, propusimos un nuevo tipo de características locales y un método de clasificación basado en vecindades. Las características propuestas se basan en valores de contraste locales, aunque manteniendo información espacial. El método de clasificación consiste en una combinación de clasificadores donde cada clasificador base se especializa en una región concreta de la cara. Ambas propuestas se compararon con las técnicas más utilizadas en este campo mediante un completo análisis experimental utilizando imágenes de caras neutras y expresivas y también imágenes de caras con gafas de sol y bufandas. Los resultados empíricos indican que todas las soluciones resuelven la tarea de forma estadísticamente equivalente cuando las imágenes de entrenamiento y test tienen las mismas características. Sin embargo, cuando los conjuntos de entrenamiento y test contienen imágenes de distintos tipos, nuestras propuestas muestran un comportamiento más robusto que el resto. Por último, presentamos un estudio estadístico de la influencia de la resolución de las imágenes en la clasificación de género. Los resultados mostraron que las resoluciones óptimas están entre 22x18 y 90x72 píxeles. Sin embargo, imágenes de sólo 3x2 píxeles proporcionan información útil para comenzar a distinguir entre géneros.
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Gallagher, Anthony. "Detection of clustered and occluded oranges from a color image of an orange tree." Honors in the Major Thesis, University of Central Florida, 1998. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/33.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.
Bachelors
Engineering
Electrical and Computer Engineering
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20

Prince, Martin Raymond. "Selective laser ablation of diseased tissue : investigations on a safe method of opening occluded arteries." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14411.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Harvard-MIT Division of Health Sciences and Technology Program in Medical Engineering and Medical Physics, 1988.
Includes bibliographical references.
by Martin R. Prince.
Ph.D.
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21

Ahn, Jinho. "Atmospheric CO₂ occluded in the Siple Dome ice core, Antarctica, and its application to climate change /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2005. http://wwwlib.umi.com/cr/ucsd/fullcit?p3185926.

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22

Doerr, Johanna. "Amodal completion of partially occluded letters : an automatic process defining the shape of a completed representation." Thesis, Lancaster University, 2009. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543961.

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23

Illing, Diane Patricia. "Orientation and recognition of both noisy and partially occluded 3-D objects from single 2-D images." Thesis, University of South Wales, 1990. https://pure.southwales.ac.uk/en/studentthesis/orientation-and-recognition-of-both-noisy-and-partially-occluded-3d-objects-from-single-2d-images(c849d6e3-24e4-4462-9afb-c608120a4019).html.

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This work is concerned with the problem of 3-D object recognition and orientation determination from single 2-D image frames in which objects may be noisy, partially occluded or both. Global descriptors of shape such as moments and Fourier descriptors rely on the whole shape being present. If part of a shape is missing then all of the descriptors will be affected. Consequently, such approaches are not suitable when objects are partially occluded, as results presented here show. Local methods of describing shape, where distortion of part of the object affects only the descriptors associated with that particular region, and nowhere else, are more likely to provide a successful solution to the problem. One such method is to locate points of maximum curvature on object boundaries. These are commonly believed to be the most perceptually significant points on digital curves. However, results presented in this thesis will show that estimators of point curvature become highly unreliable in the presence of noise. Rather than attempting to locate such high curvature points directly, an approach is presented which searches for boundary segments which exhibit significant linearity; curvature discontinuities are then assigned to the junctions between boundary segments. The resulting object descriptions are more stable in the presence of noise. Object orientation and recognition is achieved through a directed search and comparison to a database of similar 2-D model descriptions stored at various object orientations. Each comparison of sensed and model data is realised through a 2-D pose-clustering procedure, solving for the coordinate transformation which maps model features onto image features. Object features are used both to control the amount of computation and to direct the search of the database. In conditions of noise and occlusion objects can be recognised and their orientation determined to within less than 7 degrees of arc, on average.
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Embong, Abdullah. "A computational model of two-dimensional line drawing interpretations of partially occluded patterns based on simplicity principle." Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/32877.

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The key question of perception is how we manage to get an accurate, unambiguous and phenomenologically complete perception of the real world from proximal stimuli which are generally ambiguous and sometimes incomplete. Given a pattern as a visual input, we usually interpret it in one form although, in general, many interpretations of the pattern are possible. A study of the perceptual preference of partially occluded objects in two dimensional line drawings is presented. Two types of interpretations are considered, mosaic and completion. The interpretation is based on global as well as local simplicity. Global simplicity is measured by an information-load based on Leeuwenberg's model of coding theory and a minimum principle. The problems arising from this model are discussed and a solution based on an accessibility criterion is elaborated. However, this criterion alone does not solve the problem of local effect phenomena. Interpretations based on local cue information are then examined, and the issue of global versus local minima is considered from a computational perspective. In conclusion, a machine model of preference based on both local and global considerations is proposed, and its results compared to the results of psychological experiments on perceptual preference.
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Turner, Christina. "J.M. Coetzee's occluded intertextuality : reading text, intertext and the archive in Life & Times of Michael K and Foe." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/45062.

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This thesis is a study of occluded intertextuality in two novels by South African author J.M. Coetzee, Life & Times of Michael K (1983) and Foe (1986). It examines Coetzee’s novels in concert with intertexts and archival materials to determine how Coetzee employed intertextuality as a means of negotiating his positionality as a white liberal author in late-apartheid South Africa. In Chapter 1 I examine Coetzee’s initial intention, exhibited in a working notebook and early drafts, to rewrite Heinrich Von Kleist’s 1811 novella Michael Kohlhaas, demonstrating how, although Coetzee ultimately moved away from this intertext, its traces remain in Michael K through an inescapable lacuna which creates an experience of hesitation for character, author, and reader. In Chapter 2, I trace Coetzee’s attempts to rewrite Daniel Defoe’s 1724 courtesan narrative, Roxana, although Foe’s typically identified intertext is Robinson Crusoe. A contrapuntal reading of Roxana reveals that imperialism, motherhood, prostitution, and authorship form a knot in that text, which is transferred to Coetzee’s novel via the return of Susan Barton’s lost daughter in the novel’s final section. Chapter 2 thus seeks to supplement readings of Foe that posit Friday as the novel’s ultimate representation of ethical engagement with alterity. This thesis establishes a relationship of comparative exchange between several kinds of intertext and in doing so aims to construct a personal ethics of reading. Derek Attridge describes the ethics of reading as an encounter, through literature, with the other, or an other. For Attridge, “Coetzee’s works both stage, and are, irruptions of otherness into our familiar worlds” (xii) precisely because reading his work is an event. This thesis seeks to expand Attridge’s conceptualization of reading Coetzee’s work as an event beyond the borders of individual texts to consider the ethical force that results from reading text, intertext and foretext concurrently and interactively.
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Cintra, Marina de Godoy Almeida. "Estudo comparativo da reprodutibilidade do arco facial e de um novo dispositivo com nível de bolha para montagem de modelos maxilares em articulador semi-ajustável." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/58/58133/tde-14052015-113018/.

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O arco facial tem seu uso descrito na literatura desde o início do século 20, e atualmente sua eficácia e precisão são controversas. Publicações recentes mostram que a sua reprodutibilidade é passível de erros. Este estudo teve como objetivo comparar a reprodutibilidade do arco facial com a de um novo dispositivo desenvolvido com nível de bolha para a montagem de modelos de gesso em articuladores semi-ajustáveis, por meio da análise de medidas realizadas com a Mesa de Erickson. Os modelos de gesso foram obtidos com moldes de alginato e montados em articulador semi-ajustável marca Bio-art, modelo a7 Plus. A avaliação da reprodutibilidade foi realizada em 10 participantes, com a obtenção de três montagens de seus modelos maxilares, sendo a primeira com o arco facial, a segunda com o dispositivo com nível de bolha estando o participante sentado e a terceira com o dispositivo com nível de bolha estando o participante em pé, cada método foi aferido 3 vezes, por 3 examinadores diferentes. Para cada montagem foram realizadas cinco medidas a saber: a) nas cúspides dos primeiros molares superiores de cada lado (dentes 16 e 26), b) cúspides dos caninos superiores de cada lado (dentes 13 e 23) e c) ponto interincisivo, localizado na linha média. Os valores obtidos foram submetidos ao Cálculo do Erro Técnico da Medida e ao Coeficiente de Variação interexaminador. O presente trabalho concluiu que o arco facial tem uma margem de erro em medidas repetidas maior do que o novo dispositivo desenvolvido. O novo dispositivo mostrou-se mais confortável para os participantes, mas necessita mais testes para avaliarmos sua eficiência.
The face bow has been described in the literature since the early 20th century, and currently its effectiveness and accuracy are controversial. Recent publications show that the reproducibility is error-prone. This study aimed to compare the reproducibility of the face bow with a new device developed with bubble level for the assembly of plaster models in semi-adjustable articulators, through the analysis of measurements performed with Erickson table. The plaster models were obtained with alginate molds and mounted on semi-adjustable articulator brand Bio-art, a7 Plus model. Evaluation of reproducibility was conducted in 10 participants, obtaining three assemblies of their maxillary casts, the first one with the face bow, the second with the bubble level device with the participant being seated and the third level with the device bubble being the participant standing, each method was measured 3 times by 3 different examiners. For each assembly five measurements were performed as follows: a) in the cusps of the upper first molars on each side (teeth 16:26), b) cusps of upper canines on each side (teeth 13:23) and c) interincisal point, located in midline. The values obtained were subjected to measurement of the Technical Error Calculation and inter Coefficient of Variation. This study concluded that the face bow has a margin of error in repeated measurements greater than the newly developed device. The new device was more comfortable for the participants, but it needs more testing to evaluate their efficiency.
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Shin, Joo-Heon. "TOPOLOGICAL PROPERTIES OF A NETWORK OF SPIKING NEURONS IN FACE IMAGE RECOGNITION." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2133.

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We introduce a novel system for recognition of partially occluded and rotated images. The system is based on a hierarchical network of integrate-and-fire spiking neurons with random synaptic connections and a novel organization process. The network generates integrated output sequences that are used for image classification. The network performed satisfactorily given appropriate topology, i.e. the number of neurons and synaptic connections, which corresponded to the size of input images. Comparison of Synaptic Plasticity Activity Rule (SAPR) and Spike Timing Dependant Plasticity (STDP) rules, used to update connections between the neurons, indicated that the SAPR gave better results and thus was used throughout. Test results showed that the network performed better than Support Vector Machines. We also introduced a stopping criterion based on entropy, which significantly shortened the iterative process while only slightly affecting classification performance.
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Grove, Philip M. "Binocular visual direction the bifixation space, empirical corresponding points in the central binocular field, and visual direction of features belonging to partially occluded surfaces /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ66349.pdf.

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29

Walter, Juliane Katharina. "Charakterisierung der Struktur, Funktion und Wechselwirkungen der Tight Junction Proteine Occludin und Zonula Occludens 1." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2009. http://dx.doi.org/10.18452/16012.

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Die tight junction schränken die Diffusion durch den parazellulären Raum in Epithel- und Endothelzellschichten für viele Moleküle stark ein. Dadurch behindern sie die Aufnahme von wasserlöslichen Medikamenten in das dahinterliegende Gewebe. Zwei Proteine, die am tight junction Aufbau mitwirken, sind Zonula Occludens Protein 1 (ZO-1) und Occludin. Eine Öffnung der tight junctions stellt eine Möglichkeit für die Verabreichung von Medikamenten dar. Deshalb wurden die tight junction Proteine ZO-1 und Occludin auf ihre Funktion, Struktur und Regulation untersucht. Für die Interaktion beider Proteine gab es ein Modell, welches eine Oligomerisierung der Bindungspartner als Voraussetzung ihrer Interaktion über helikale Wechselwirkungen vorhersagte. Die Annahmen aus dem Modell der Interaktion von ZO-1 und Occludin konnten experimentell bestätigt werden. Für den C-Terminus von Occludin wurde darüber hinaus eine Interaktion über Disulfidbrücken nachgewiesen. Diese Interaktion könnte in der Zelle von pathologischer Bedeutung bei Schlaganfall und Ischchämie sein. Beide Erkrankungen verursachen eine Öffnung der tight junction im Zusammenhang mit oxidativem Stress. ZO-1 bindet über PDZ Domänen eine Vielzahl von tight junction Proteinen, die an der Abdichtung des parazellulären Raums beteiligt sind. Deshalb wurde die Interaktion und Regulation der PDZ-Domänen aus ZO-1 untersucht. Eine Phosphorylierung der PDZ durch die Proteinkinase C alpha sowie eine Interaktion mit den Phosphatasen 2A und 4 konnte nachgewiesen werden. In vitro konnte gezeigt werden, dass die Phosphorylierung der PDZ-Domänen die Bindung an Membranproteine der tight junction beeinflusst. Diese Arbeit leistet einen Beitrag, die Mechanismen, die zum Verschluss des parazellulären Spaltes führen, aufzuklären. Damit zeigt sie Ansatzpunkte für eine pharmakologische Beeinflussung der Permeabilität der tight junction auf.
Tight junctions restrict diffusion through the paracellular gap in endothelia and epithelia. Thereby they constrain the uptake of water soluble drugs to the tissue. Zonula occludens protein 1 (ZO-1) and occludin are some of proteins involved in tight junction assembly. The opening of tight junctions is a possibility to apply drugs. Therefore the structure, function and regulation of ZO-1 and occludin is characterised. In previous studies, a model predicted the interaction of occludin and ZO-1 through helices. It was proposed that the interaction is mediated by oligomers of ZO-1 and Occludin. This author´s experimental research supports these hypotheses. Furthermore, occludin is shown to self assemble via disulfide bridges. This interaction could be of importance during stroke and ischemia. Both diseases cause the opening of tight junctions in combination with oxidative stress. In addition, this author investigated the interaction and regulation of the PDZ domains of ZO-1. It was shown that the PDZ domains are phosphorylated by protein kinase C alpha and interact with protein phosphatases 2A and 4. Phosphorylation led to a reduction in affinity of PDZ to membrane proteins in vitro. This thesis contributes to the understanding of the mechanisms which are involved in the sealing of the paracellular gap.
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30

Mahalingam, Vijay Venkatesh. "DIGITAL INPAINTING ALGORITHMS AND EVALUATION." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_diss/55.

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Digital inpainting is the technique of filling in the missing regions of an image or a video using information from surrounding area. This technique has found widespread use in applications such as restoration, error recovery, multimedia editing, and video privacy protection. This dissertation addresses three significant challenges associated with the existing and emerging inpainting algorithms and applications. The three key areas of impact are 1) Structure completion for image inpainting algorithms, 2) Fast and efficient object based video inpainting framework and 3) Perceptual evaluation of large area image inpainting algorithms. One of the main approach of existing image inpainting algorithms in completing the missing information is to follow a two stage process. A structure completion step, to complete the boundaries of regions in the hole area, followed by texture completion process using advanced texture synthesis methods. While the texture synthesis stage is important, it can be argued that structure completion aspect is a vital component in improving the perceptual image inpainting quality. To this end, we introduce a global structure completion algorithm for completion of missing boundaries using symmetry as the key feature. While existing methods for symmetry completion require a-priori information, our method takes a non-parametric approach by utilizing the invariant nature of curvature to complete missing boundaries. Turning our attention from image to video inpainting, we readily observe that existing video inpainting techniques have evolved as an extension of image inpainting techniques. As a result, they suffer from various shortcoming including, among others, inability to handle large missing spatio-temporal regions, significantly slow execution time making it impractical for interactive use and presence of temporal and spatial artifacts. To address these major challenges, we propose a fundamentally different method based on object based framework for improving the performance of video inpainting algorithms. We introduce a modular inpainting scheme in which we first segment the video into constituent objects by using acquired background models followed by inpainting of static background regions and dynamic foreground regions. For static background region inpainting, we use a simple background replacement and occasional image inpainting. To inpaint dynamic moving foreground regions, we introduce a novel sliding-window based dissimilarity measure in a dynamic programming framework. This technique can effectively inpaint large regions of occlusions, inpaint objects that are completely missing for several frames, change in size and pose and has minimal blurring and motion artifacts. Finally we direct our focus on experimental studies related to perceptual quality evaluation of large area image inpainting algorithms. The perceptual quality of large area inpainting technique is inherently a subjective process and yet no previous research has been carried out by taking the subjective nature of the Human Visual System (HVS). We perform subjective experiments using eye-tracking device involving 24 subjects to analyze the effect of inpainting on human gaze. We experimentally show that the presence of inpainting artifacts directly impacts the gaze of an unbiased observer and this in effect has a direct bearing on the subjective rating of the observer. Specifically, we show that the gaze energy in the hole regions of an inpainted image show marked deviations from normal behavior when the inpainting artifacts are readily apparent.
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Vitadello, Teresa [Verfasser], Tareq [Akademischer Betreuer] Ibrahim, Tareq [Gutachter] Ibrahim, and Stephan [Gutachter] Nekolla. "Hybrid PET/MR imaging for the prediction of left ventricular recovery after percutaneous revascularization of chronic total occluded coronaries / Teresa Vitadello ; Gutachter: Tareq Ibrahim, Stephan Nekolla ; Betreuer: Tareq Ibrahim." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1222672812/34.

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32

Schmidt, Anke. "Identifizierung und Charakterisierung der Bindung zwischen dem Zonula-occludens-Protein 1 und dem Tight-junction-Protein Occludin." [S.l.] : [s.n.], 2002. http://www.diss.fu-berlin.de/2002/251/index.html.

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33

Cron, Amanda J. Wright. "The Statement of Purpose in Applications to PhD Programs in Rhetoric and Composition: An Activity Theory Analysis." University of Dayton / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1281446509.

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34

Lloyd, Gary James. "Observations of the origin and distribution of primary and secondary ice in clouds." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/observations-of-the-origin-and-distribution-of-primary-and-secondary-ice-in-clouds(fbe41932-ddf0-49c2-b634-89575e919037).html.

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A detailed understanding of cloud microphysical processes is crucial for a large range of scientific disciplines that require knowledge of cloud particles for accurate climate and weather prediction. This thesis focuses on 3 measurement campaigns, encompassing both airborne and ground based measurements of the microphysical structures observed in cold, warm and occluded frontal systems around the United Kingdom, stratocumulus clouds in the Arctic and many different clouds observed over a 6 week period at a high-alpine site in the Swiss Alps. Particular attention was paid to the origin and distribution of both primary and secondary ice and the dominant features associated with ice phase processes. During investigation of cold, warm and occluded frontal systems associated with mid-latitude cyclones around the U.K., secondary ice was often found to dominate the number and mass concentrations of ice particles in all systems. The presence of large liquid droplets was sometimes observed in close proximity to regions of secondary ice production. The existence of these provides a possible mechanism by which rime-splintering is greatly enhanced through the creation of instant rimers as the large drops freeze. In-situ measurements during the cold frontal case were used to calculate rates of diabatic heating during a comparison between bin-resolved and bulk microphysics schemes. Observations in arctic stratocumulus clouds during spring and summer seasons revealed higher ice concentrations in the summer cases when compared to the spring season. This is attributed to secondary ice production actively enhancing ice concentrations in the summer, due to the higher temperature range the clouds spanned. At Jungfraujoch in the Swiss Alps, ground based measurements allowed us to obtain high spatial scale resolution measurements of cloud microphysics and we found transitions between high and low ice mass fractions that took place on differing temporal scales spanning seconds to hours. During the campaign measurements of aerosol properties at an out of cloud site, Schilthorn, were made. When analysing a Saharan Dust Event that took place a possible link between the number of U.V. fluorescent particles and the number of ice particles was found in the temperature range around -10 ºC.
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35

Tricoit, Sandy. "Modélisation et simulation numérique de la propagation de la corrosion par piqûres du fer en milieu chloruré : contribution à l'évaluation de la durabilité des aciers au carbone en conditions de stockage géologique." Thesis, Dijon, 2012. http://www.theses.fr/2012DIJOS054/document.

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Cette étude porte sur la compréhension des mécanismes de la corrosion par piqûres susceptible d’affecter les aciers au carbone prévus pour le stockage des déchets radioactifs. Des modèles de transport/réaction ont été développés pour simuler, par la méthode des éléments finis, la propagation d’une piqûre à la surface du fer en milieu chloruré. Pour les modèles conservatifs, la piqûre est activée par un potentiel imposé au métal. A partir de différentes études paramétriques (géométrie, environnement…), les simulations ont permis d’identifier les facteurs critiques responsables d’un accroissement ou d’une inhibition de la vitesse de corrosion localisée. Par ailleurs, les essais sur des électrodes occluses, dites « lead-in-pencil », confirment que le confinement favorise la précipitation d’un film salin en fond de piqûre. Enfin, la simulation de situations de couplage entre la piqûre et la surface cathodique externe a permis de décrire l’évolution réaliste de la vitesse de corrosion localisée en milieu aéré et en potentiel libre. L’analyse des résultats de ces trois axes démontre que la chute ohmique dans la piqûre est le facteur contrôlant sa progression. Dans la majorité des cas, toute augmentation de cette chute ohmique (due à la précipitation, au confinement ou à l’augmentation du rapport des surfaces cathodique/anodique), conduit à une vitesse de corrosion plus rapide des surfaces externes. Ce phénomène est qualifié « d’évasement ». La croissance en profondeur, pour une vitesse d’oxydation dépendante du pH, reste à confirmer. Pour simuler le comportement à long terme du fer vis-à-vis de la piqûration, dans les conditions de stockage, les nouveaux modèles devront reposer sur la détermination plus précise de l’environnement et des lois de dissolution et de précipitation
This study deals with the understanding of the mechanisms of pitting corrosion susceptible to occur on carbon steel selected for high level nuclear waste containers. Transport/reaction models have been developed in order to simulate, by finite element method, the propagation of a pit on iron in chlorinated medium. For conservative models, pit is activated by imposing a potential on metal. Thanks to different parametric studies (geometry, environment…) simulations have permitted to classify, by severity order, the factors responsible of the increase or the inhibition of the localized corrosion rate. Otherwise, experiments on occluded (called « lead-in-pencil ») electrodes confirm that confinement favors the formation of a salt film at the bottom of the pit. Finally, the simulation of galvanic coupling between the pit and the surrounding cathodic surface has permitted to describe the realistic evolution of the localized corrosion rate in aerated medium and for free corroding conditions. The analysis of the results from these three ways of investigation has demonstrated that the ohmic drop inside the pit is the most important factor controlling his growing. In most study cases, any increase of this ohmic drop (due to precipitation, confinement or augmentation of the cathodic /anodic surfaces ratio), leads to a faster corrosion rate of the surrounding surface. This phenomenon is called “opening” of the pit. The progression at the pit bottom for a pH-dependant oxidation rate is still to confirm. In order to simulate the long term behavior of iron during pitting, in storage application, new models require a more accurate determination of the environment conditions, dissolution and precipitation laws
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36

Chambers, Destinee L. "Understanding Occlusion Inhibition: A Study of the Visual Processing of Superimposed Figures." Amherst, Mass. : University of Massachusetts Amherst, 2009. http://scholarworks.umass.edu/open_access_dissertations/6/.

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37

Coleman, Christopher Ryan. "Fast self-shadowing using occluder textures." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4912.

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A real-time self-shadowing technique is described. State of the art shadowing techniques that utilize modern hardware often require multiple rendering passes and introduce rendering artifacts. Combining separate ideas from earlier techniques which project geometry onto a plane and project imagery onto an object results in a new real-time technique for self-shadowing. This technique allows an artist to construct occluder textures and assign them to shadow planes for a self-shadowed model. Utilizing a graphics processing unit (GPU), a vertex program computes shadowing coordinates in real-time, while a fragment program applies the shading and shadowing in a single rendering pass. The methodology used to create shadow planes and write the vertex and fragment programs is given, as well as the relation to the previous work. This work includes implementing this technique, applying it to a small set of test models, describing the types of models for which the technique is well suited, as well as those for which it is not well suited, and comparing the technique’s performance and image quality to other state of the art shadowing techniques. This technique performs as well as other real-time techniques and can reduce rendering artifacts in certain circumstances.
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LISOWSKI, KARIN SULAMITA LEAO. "MPLICIT OCCLUDER METHOD AND VISUALIZATION APPLICATIONS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=10086@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
Neste trabalho aplicamos o método de oclusão implícita para acelerar o tempo de cálculo e renderização de isosuperfícies em dados volumétricos regulares. Dado um campo escalar contínuo f sobre um domínio D (onde Dé convexo) e um isovalor w, a oclusão implícita explora a continuidadede f para determinar os limites de visibilidades sem a necessidade de calcular a isosuperfície explicitamente. Aplicamos esta técnica para obter também as silhuetas visíveis das isosuperfícies.
In this work we apply the Implicit Occluders method for optimizing the computation and rendering of isosurfaces in regular volumetric data. Given a continuous scalar field f over a domain D and an isovalue w, Implicit Occluders exploits the continuity of f to determine visibility bounds without the need for computing the isosurface explicitly. We apply this technique to obtain also the visible silhouettes of isosurfaces.
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Johansson, Joel. "Säg Bob! : Sex sångare om nedsjungning." Thesis, Kungl. Musikhögskolan, Institutionen för musik, pedagogik och samhälle, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kmh:diva-3921.

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Detta är en kvalitativ studie med kvantitativa inslag med syftet att undersöka sångares upplevelser avnedsjungning efter högintensiv sång. Till en början har specifikt designade sångövningar förmedlats till sex medverkande sångare om fyra kvinnor och två män under individuella sånglektioner. Deltagarna har i en variant av crossover design skattat sin dagliga rösthälsa i EASE- självskattningsformulär för friska röster. Testperioden om tre veckor följdes sedan av kvalitativa intervjuer. Resultat visar att även om sångares vardag är komplex, i och med inre och yttre påverkande faktorer, har nedsjungning en upplevd effekt i avseendet förbättrad rösthälsa efter högintensiv sång. Detta gäller särskilt de kvinnliga sångarna som beskriver att nedsjungning bidragit till en mer samlad röst med minskad heshet och svullnad. Vidare rapporteras om större lätthet inför att sjunga i lägre delen av bröstregistret, en mer egaliserad röst och en förbättrad tal- och magstödsteknik tillsammans med större lätthet inför påföljande sångpass. Nedsjungning ses också ha skapat ett andrum i vardagen där minskad stress, prestationskrav och resultatinriktning omvänts till en samlad känsla av avslut. Likväl är begrepp som nedsjungning, att sjunga ned, kyla ned, eller att stretcha rösten nya begrepp som rekommenderas att vidare studeras och förmedlas till elever och studenter, framför allt då föreliggande studies resultat visar tydliga attitydskillnader avseende rösthälsa och röstvård emellan de olika könen.
This is a study regarding singers' experiences of a vocal-cool down routine preceded with a heavy vocal load. The study is mainly based on a qualitative approach with quantitative elements. At first individual singing lessons where held, whereas specifically designed vocal-cool down exercises were taught to six participating singers; four women and two men. With a modification of a crossover design the singers in this study have estimated their daily voice health in the Evaluation of the Ability to Sing Easily survey (EASE). After a three week period of tests the singers were interviewed. The result of this study shows that even if singers' everyday lives are complex due to internal and external factors, vocal- cool down where perceived as an improvement of voice health. It is mainly the female singers' that describes an increased vocal well-being, with less hoarseness and swollen vocal folds after a heavy vocal load, followed by a vocal -cool down routine. Furthermore a greater sense of ease was reported in terms of transitions between registers in the singing voice, where fatigue in the surrounding muscles also decreased alongside with a positive impact on the speaking voice, reaching lower notes in chest register and extended diaphragm breathing. The vocal cool-down routine itself also gave an unexpected finding in terms of being contemplative and relaxing for the singers; creating a breathing space in everyday life where stress, performance anxiety and other concerns where easier to let go of, with an overall feeling of closure. Vocal cool down, cooling down the voice, vocal stretch, or warming down your voice are all relatively new concepts that are recommended to be studied further, spread and taught to students and pupils, - especially as the result in this study indicates clear differences in attitudes regarding voice health in-between the male and female genders.
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40

Tomashefski, David J. "An Erodibility Assessment of Central Ohio Cropland Soils." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1460994636.

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41

Andreeva, Anna. "Protein kinase C isoform antagonism controls occludin phosphorylation and tight junction assembly." [S.l. : s.n.], 2004. http://www.diss.fu-berlin.de/2004/149/index.html.

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42

Wei, Cheng-Yi, and 魏正義. "Partially Occluded Face Recognition." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/vfz6za.

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碩士
國立臺灣海洋大學
電機工程學系
105
With the rapid development of science and technology, image processing technology is the human in the business community, the increasing importance, so we are closely related to the identification system, such as face, voice, fingerprint, palm, iris and other identification methods, , The identification of personal identity, when the face to identify the most direct way, but also people understand each other important key, more in line with the current situation in human society, so according to each person in the face image presented different characteristics As a sense of identity, will be able to provide life more convenient application technology. The image recognition is an extremely important part of artificial intelligence technology. However, computer vision system, in recent years, applied to the identification, detection, tracking and other related fields and industries, has made significant progress, and computer vision system to help people engaged in various activities is more and more widely. Because in terms of human vision, facial features compared to other features, is the most direct way of identification, will be in accordance with each person in the facial image presented by the different feature points as identification, and in different forms of mask, Blocking the facial features, the identification ability can still maintain a high recognition rate. This paper uses general mobile phone with driving recorder and other imaging equipment, the use of photography, photography and other methods, and then achieve the function of face detection and identification. The use of computer software to build a part of the face when the shelter, detection and identification methods, human face detection and identification, first in the image search for skin color, and then use Viola face detection method to determine whether the face , And identify facial features, to capture and analyze. When the face part of the cover, search out the closest face, and determine its eyes, mouth and other organs. Through the actual test and adjustment, can use the general camera's camera function, within a certain distance, will be able to identify the face and face organs, the use of feature methods can quickly find the human face contours, through the algorithm and then fast The identification of the facial organs, when the face part of the shelter, but also a quick identification, and the box selected facial organs position, and the identification rate of up to Bacheng, and will be applied to 2 meters within the face recognition.
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43

Chen, Dung-Mau, and 陳東懋. "Fast Occluded Object Tracking Technology." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/19721908349930481752.

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碩士
國立臺北教育大學
資訊科學研究所
94
Objects in the world exhibit complex interactions. When captured in a video sequence, some interactions manifest themselves as occlusions. A visual tracking system must be able to track objects which are partially or even fully occluded. Occlusion is a difficult problem in target tracking, especially when users need to track multiple targets simultaneously and maintain the target identities during tracking. With this complex design issue, in this paper we present a fast occluded object tracking technique. The purpose of this paper is to present a novel approach to cope with the occlusion problem explicitly. Our approach is by use of the occlusion handling with the measurement on object distance and power. Our system has the advantages of low cost and low complexity, and can be realized in real time system.
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44

Williams, Lance Richard. "Perceptual completion of occluded surfaces." 1994. https://scholarworks.umass.edu/dissertations/AAI9420698.

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Researchers in computer vision have primarily studied the problem of visual reconstruction of environmental structure that is plainly visible. In this thesis, the conventional goals of visual reconstruction are generalized to include both visible and occluded forward facing surfaces. This larger fraction of the environment is termed the anterior surfaces. Because multiple anterior surface neighborhoods project onto a single image neighborhood wherever surfaces overlap, surface neighborhoods and image neighborhoods are not guaranteed to be in one-to-one correspondence, as conventional "shape-from" methods assume. The result is that the topology of three-dimensional scene structure can no longer be taken for granted, but must be inferred from evidence provided by image contours. Where boundaries are not occluded and where surface reflectance is distinct from that of the background, boundaries will be marked by image contours. However, where boundaries are occluded, or where surface reflectance matches background reflectance, there will be no detectable luminance change in the image. Deducing the complete image trace of the boundaries of the anterior surfaces under these circumstances is called the figural completion problem. In this thesis, we show that the boundaries of the anterior surfaces can be represented in viewer-centered coordinates as a labeled knot diagram. The interior neighborhoods of the anterior surfaces are explicitly represented by a combinatorial model called a paneling, which is produced from a labeled knot diagram by means of a straightforward construction. Conventional "shape-from" methods formulated as variational problems and defined over image neighborhoods can be applied to the neighborhoods of the paneling equally well. The labeling scheme and paneling construction provide a solid theoretical foundation for a working experimental system which computes surface representations from illusory contour displays, including well known figures from the visual psychology literature. The experimental system employs a two stage process of completion hypothesis and combinatorial optimization. The labeling scheme is enforced by a system of integer linear inequalities so that the final organization is the optimal feasible solution of an integer linear program.
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45

Chau-Jin, Chan. "Occluded object recognition using Markov model." 1998. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0009-0112200611324242.

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46

Huang, Chang-Yu, and 黃川育. "Occluded Human Segmentation and Behavior Recognition." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/19060886020390317233.

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碩士
元智大學
電機工程學系
96
Human behavior analysis is an important task in various applications like video surveillance, video retrieval, human interaction system, and so on. Most behavior analysis systems only recognize various behaviors performed from only one single human. When two persons are occluded together, the above systems will fail to recognize the related behaviors between them. To tackle this problem, this paper proposes a novel method for segmenting occluded pedestrians to different parts and then well recognizing their behaviors. First of all, a background subtraction is first applied to extracting different foreground objects from videos. Then, a triangulation technique is used for dividing the foreground object into different triangulation meshes. From the triangulation results, different posture features can be well extracted and used for representing each posture. Then, a novel hybrid method is proposed for segmenting the occluded pedestrians to different semantic human body parts. Two different models, i.e., template and color ones, are used in the hybrid method so that the probability of each body part can be well estimated for body segmentation. After segmentation, the central contexts of each occluded postures are then extracted for human behavior analysis. Experimental results have proved the superiorities of the proposed method in occluded pedestrian analysis and behavior recognition.
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47

Chan, Chau-Jin, and 張朝晉. "Occluded object recognition using Markov model." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/45884521566888370184.

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碩士
元智大學
電機與資訊工程研究所
87
A novel and efficient method for occluded object recognition using Markov model is proposed in this thesis. For an occluded image, the features at dominant points are extracted, which in turn are used in MM construction for the scene image. Then the features of the reference model can also be extracted for matching evaluation. Two categories of features are used in this study. One is transform-invariant and the other is transform-variant. The former is used in the latter matching process to find candidate matching subsequences which in turn are used to estimate transformation parameters. Then matching score based on transform-invariant can be evaluated, such that the recognition process can be performed step by step according to the score rank to find out all the models in scene image. Moreover, for each occluded object, we can recognize where it is and what orientation and scale it is step by step. Therefore, the problem for occluded object recognition is solved. The proposed method has applied on three databases: puzzle and tool. The experimental results prove the effectiveness, robustness and practicability of the proposed approach.
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48

"Computer recognition of partially-occluded objects." Chinese University of Hong Kong, 1986. http://library.cuhk.edu.hk/record=b5885680.

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49

Huang, Shih-Liang, and 黃世良. "Occluded Object Recognition Using Two Image Sequences." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/43552300354315338476.

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碩士
國立交通大學
控制工程系
85
Inhis thesis, we propose modified approach for occluded object recognition.In order to extract the target from the background, we use two image sequences that include the same background and the moving target to achieve the objective. First, the two image sequences are chosen to form an absolute difference image. This provides the region of the moving target.After thresholding, we obtain the binary image of the target. We use roll dilation method to obtain the closed boundary of the combined target which helps us to extract features from the target easily.To recognize a partial occluded target, we divide the boundary into six segments and extract features from them. We use a feature matching method to classify the boundary segments. We also divide the boundary of the combined target by different several ways. These results help us to obtain a good recognition result by using a voting rule. From recognition results, we find that our proposed method can obtain a good performance for occluded target recognition.
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50

Gu, Shao-Huan, and 辜紹桓. "Facial Expression Recognition on Partially-Occluded Faces." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/12887632407413329519.

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碩士
國立東華大學
資訊工程學系
99
This paper proposes an approach on dependent person to recognize partially occluded and damaged facial expression images, include an iterative face recovery method and a recognition method called the recognition-by-input-approximation (RBIA) method. We use PCA technique to build a person-specific eigenspace for each person identity and a person’s expression-specific eigenspace for each person’s expression. The iterative face recovery method can recover face textures on occluded or damaged area very well. The recovered faces can better preserve personal characteristics and the original input illumination. Using RBIA method to recognize facial expression with two- stage recognition way. Different from common template matching method, RBIA match recovered face with original input face texture, which will not restrict to the fixed template or model. Our experiments on the public cohn-kanade face database show recognition rate in recognizing faces with partially occlusions and different illumination, and recognition rate is better than other method.
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