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Literatura académica sobre el tema "Primitive estimation"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 1 de febrero de 2022

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Artículos de revistas sobre el tema "Primitive estimation"

Hachiuma, Ryo y Hideo Saito. "Pose Estimation of Primitive-Shaped Objects from a Depth Image Using Superquadric Representation". Applied Sciences 10, n.º 16 (6 de agosto de 2020): 5442. http://dx.doi.org/10.3390/app10165442.

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This paper presents a method for estimating the six Degrees of Freedom (6DoF) pose of texture-less primitive-shaped objects from depth images. As the conventional methods for object pose estimation require rich texture or geometric features to the target objects, these methods are not suitable for texture-less and geometrically simple shaped objects. In order to estimate the pose of the primitive-shaped object, the parameters that represent primitive shapes are estimated. However, these methods explicitly limit the number of types of primitive shapes that can be estimated. We employ superquadrics as a primitive shape representation that can represent various types of primitive shapes with only a few parameters. In order to estimate the superquadric parameters of primitive-shaped objects, the point cloud of the object must be segmented from a depth image. It is known that the parameter estimation is sensitive to outliers, which are caused by the miss-segmentation of the depth image. Therefore, we propose a novel estimation method for superquadric parameters that are robust to outliers. In the experiment, we constructed a dataset in which the person grasps and moves the primitive-shaped objects. The experimental results show that our estimation method outperformed three conventional methods and the baseline method.

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LI, Liang, Akira ASANO, Chie MURAKI ASANO, Mitsuji MUNEYASU y Yoshiko HANADA. "Dual Primitive Estimation of Textures". IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E94-A, n.º 4 (2011): 1165–69. http://dx.doi.org/10.1587/transfun.e94.a.1165.

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Lee, Sukhan, Kyeong Dae Yoo, Jae Woong Kim y Moon Ju Lee. "Surface Patch Primitive Based Object Modeling from CAD Data". Applied Mechanics and Materials 162 (marzo de 2012): 179–83. http://dx.doi.org/10.4028/www.scientific.net/amm.162.179.

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For manufacturing automation, for instance, the robotic automation of automobile sub-assembly, CAD data serves as DB offering the geometric information of parts essential for robotic manipulation. However, a direct application of CAD for the robotic manipulation of parts may be of an issue, due to the fact that the particular format of the CAD data available, e.g., STL, does not directly provide certain geometric entities such as surface patch primitives and/or features that are required for robotic manipulation. In this paper, we present a novel method for extracting geometric primitives and/or features, such surface patch primitives as planar, cylindrical, conic, and spherical patches, from the STL format of CAD data, such that an industrial part/object can be represented as a logical sum of these surface patch primitives extracted. This surface patch primitive based modeling makes the automated reasoning involved in the recognition and pose estimation, as well as the grasp planning, of parts/objects easy to be done. The proposed method is applied to various CAD data samples for experimentation: the results demonstrate the reliability as well as the computational efficiency of the proposed method in the extraction of surface patch primitives.

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JENKINS, ODEST CHADWICKE, GERMÁN GONZÁLEZ SERRANO y MATTHEW M. LOPER. "INTERACTIVE HUMAN POSE AND ACTION RECOGNITION USING DYNAMICAL MOTION PRIMITIVES". International Journal of Humanoid Robotics 04, n.º 02 (junio de 2007): 365–85. http://dx.doi.org/10.1142/s0219843607001060.

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There is currently a division between real-world human performance and the decision making of socially interactive robots. This circumstance is partially due to the difficulty in estimating human cues, such as pose and gesture, from robot sensing. Towards bridging this division, we present a method for kinematic pose estimation and action recognition from monocular robot vision through the use of dynamical human motion vocabularies. Our notion of a motion vocabulary is comprised of movement primitives that structure a human's action space for decision making and predict human movement dynamics. Through prediction, such primitives can be used to both generate motor commands for specific actions and perceive humans performing those actions. In this paper, we focus specifically on the perception of human pose and performed actions using a known vocabulary of primitives. Given image observations over time, each primitive infers pose independently using its expected dynamics in the context of a particle filter. Pose estimates from a set of primitives inferencing in parallel are arbitrated to estimate the action being performed. The efficacy of our approach is demonstrated through interactive-time pose and action recognition over extended motion trials. Results evidence our approach requires small numbers of particles for tracking, is robust to unsegmented multi-action movement, movement speed, camera viewpoint and is able to recover from occlusions.

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Lavva, I., E. Hameiri y I. Shimshoni. "Robust Methods for Geometric Primitive Recovery and Estimation From Range Images". IEEE Transactions on Systems, Man, and Cybernetics, Part B (Cybernetics) 38, n.º 3 (junio de 2008): 826–45. http://dx.doi.org/10.1109/tsmcb.2008.918567.

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Jeon, Myung-Hwan y Ayoung Kim. "PrimA6D: Rotational Primitive Reconstruction for Enhanced and Robust 6D Pose Estimation". IEEE Robotics and Automation Letters 5, n.º 3 (julio de 2020): 4955–62. http://dx.doi.org/10.1109/lra.2020.3004322.

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Nicolescu, Monica, Odest Chadwicke Jenkins, Adam Olenderski y Eric Fritzinger. "Learning behavior fusion from demonstration". Interaction Studies 9, n.º 2 (26 de mayo de 2008): 319–52. http://dx.doi.org/10.1075/is.9.2.09nic.

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A critical challenge in robot learning from demonstration is the ability to map the behavior of the trainer onto a robot’s existing repertoire of basic/primitive capabilities. In part, this problem is due to the fact that the observed behavior of the teacher may consist of a combination (or superposition) of the robot’s individual primitives. The problem becomes more complex when the task involves temporal sequences of goals. We introduce an autonomous control architecture that allows for learning of hierarchical task representations, in which: (1) every goal is achieved through a linear superposition (or fusion) of robot primitives and (2) sequencing across goals is achieved through arbitration. We treat learning of the appropriate superposition as a state estimation problem over the space of possible linear fusion weights, inferred through a particle filter. We validate our approach in both simulated and real world environments with a Pioneer 3DX mobile robot.

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Torii, Takuya y Manabu Hashimoto. "Reliable Primitive Approximation for Estimation of Robot Grasping Parameters Using 3D-DNN". Electronic Imaging 2018, n.º 9 (28 de enero de 2018): 301–1. http://dx.doi.org/10.2352/issn.2470-1173.2018.09.iriacv-301.

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Chen, Rongxin, Zongyue Wang y Yuling Hong. "Pipelined XPath Query Based on Cost Optimization". Scientific Programming 2021 (27 de mayo de 2021): 1–16. http://dx.doi.org/10.1155/2021/5559941.

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XPath query is the key part of XML data processing, and its performance is usually critical for XML applications. In the process of XPath query, there is inherent seriality between query steps, which makes it difficult to parallelize the query effectively as a whole. On the other hand, although XPath query has the characteristics of data stream processing and is suitable for pipeline processing, the data flow of each query step usually varies a lot, which results in limited performance under multithreading conditions. In this paper, we propose a pipelined XPath query method (PXQ) based on cost optimization. This method uses pipelined query primitives to process query steps based on relation index. During pipeline construction, a cost estimation model based on XML statistics is proposed to estimate the cost of the query primitive and provide guidance for the creation of a pipeline phase through the partition of query primitive sequence. The pipeline construction technique makes full use of available worker threads and optimizes the load balance between pipeline stages. The experimental results show that our method can adapt to the multithreaded environment and stream processing scenarios of XPath query, and its performance is better than the existing typical query methods based on data parallelism.

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Kumar, G. P. y U. K. Kumar. "Estimation of Gestational Age from Hand and Foot Length". Medicine, Science and the Law 34, n.º 1 (enero de 1994): 48–50. http://dx.doi.org/10.1177/002580249403400106.

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Abortion, foeticide and infanticide have been practised from time immemorial by both primitive and civilized societies. Establishing the precise duration of gestation is an important point in the total medical evidentiary picture of infanticide. In this study, an attempt has been made to establish the gestational age of the foetus using foot and hand length. This study will be of help in establishing the gestational age when the foetus is fragmented. Results obtained were significant in establishing the gestational age.

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Tesis sobre el tema "Primitive estimation"

Pacheco, Gutierrez Salvador. "3D reconstruction and guaranteed primitive shape estimation using interval analysis". Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/3d-reconstruction-and-guaranteed-primitive-shape-estimation-using-interval-analysis(0f833d20-c97f-4e59-85b7-0080807d1657).html.

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In a mobile robotic system, the interaction with the surrounding environment is essential in order to complete tasks such as localisation and mapping. This interaction can only be conducted by means of sensors that permit the accumulation of a large amount of information from several sources. However, this information is useless without adequate interpretation; thus, in order to accurately determine the positioning of the robot, it is necessary to identify and characterise landmarks in the environment required to serve as anchoring points for both localisation and mapping. Having constructed the map, an accurate analysis of the information gathered is vital. In this manner, this work is focused on two main aspects of any mobile robotic system: first, the detection and characterisation of highly descriptive landmarks by using image and point cloud processing techniques; and second, the geometrical and spatial analysis of the information gathered from the environment. For the former, two novel techniques based on image processing and geometrical analysis are presented; for the latter, a guaranteed technique for the parameter estimation of primitive shapes using interval analysis is proposed.

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Grymin, David J. "Two-Step System Identification and Primitive-Based Motion Planning for Control of Small Unmanned Aerial Vehicles". Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/24520.

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This dissertation addresses motion planning, modeling, and feedback control for autonomous vehicle systems. A hierarchical approach for motion planning and control of nonlinear systems operating in obstacle environments is presented. To reduce computation time during the motion planning process, dynamically feasible trajectories are generated in real-time through concatenation of pre-specified motion primitives. The motion planning task is posed as a search over a directed graph, and the applicability of informed graph search techniques is investigated. Specifically, a locally greedy algorithm with effective backtracking ability is developed and compared to weighted A* search. The greedy algorithm shows an advantage with respect to solution cost and computation time when larger motion primitive libraries that do not operate on a regular state lattice are utilized. Linearization of the nonlinear system equations about the motion primitive library results in a hybrid linear time-varying model, and an optimal control algorithm using the L2-induced norm as the performance measure is applied to ensure that the system tracks the desired trajectory. The ability of the resulting controller to closely track the trajectory obtained from the motion planner, despite various disturbances and uncertainties, is demonstrated through simulation. Additionally, an approach for obtaining dynamically feasible reference trajectories and feedback controllers for a small unmanned aerial vehicle (UAV) based on an aerodynamic model derived from flight tests is presented. The modeling approach utilizes the two step method (TSM) with stepwise multiple regression to determine relevant explanatory terms for the aerodynamic models. Dynamically feasible trajectories are then obtained through the solution of an optimal control problem using pseudospectral optimal control software. Discrete-time feedback controllers are then obtained to regulate the vehicle along the desired reference trajectory. Simulations in a realistic operational environment as well as flight testing with the feedback controller demonstrate the capabilities of the approach. The TSM is also applied for system identification of an aircraft using motion capture data. In this application, time domain system identification techniques are used to identify both linear and nonlinear aerodynamic models of large-amplitude pitching motions driven by control surface deflections. The resulting models are assessed based on both their predictive capabilities as well as simulation results.
Ph. D.

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Bäcklund, Henrik y Niklas Neijman. "Automatic Mesh Decomposition for Real-time Collision Detection". Thesis, Linköpings universitet, Informationskodning, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-106383.

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Intersections tests between meshes in physics engines are time consuming and computationalheavy tasks. In order to speed up these intersection tests, each mesh can be decomposedinto several smaller convex hulls where the intersection test between each pair of these smallerhulls becomes more computationally efficient. The decomposition of meshes within the game industry is today performed by digital artistsand is considered a boring and time consuming task. Hence, the focus of this master thesislies in automatically decompose a mesh into several smaller convex hulls and to approximatethese decomposed pieces with bounding volumes of different complexity. These boundingvolumes together represents a collision mesh that is fully usable in modern games.

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Amara, Mounir. "Segmentation de tracés manuscrits. Application à l'extraction de primitives". Rouen, 1998. http://www.theses.fr/1998ROUES001.

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Ce travail expose la modélisation de courbes par des éléments de droites, cercles et côniques dans une même formulation grâce à un filtrage étendu de Kalman. L'application est la segmentation des tracés manuscrits par une succession de primitives géométriques. Pour l'ajustement, nous décrivons les différentes courbes par des équations cartésiennes. Ces équations sont soumises à une contrainte de normalisation de manière à obtenir une estimation précise et robuste des paramètres des primitives géométriques. Ces deux équations, écrites sous forme implicite, constituent le système d'observation. Leur linéarisation est effectuée par un développement de Taylor au premier ordre. L'équation d'état du système est fixée constante pour spécifier la description d'une seule forme. La formulation de l'estimation récursive des paramètres utilise un filtre étendu de Kalman qui minimise une erreur quadratique, la distance d'un point à une forme, pondérée par la covariance du bruit d'observation. Pour reconstruire un tracé manuscrit, nous définissons une stratégie de changement de modèles. Dans notre cas, leur détection est fondée soit sur des critères spatio-temporels, en utilisant la dynamique du tracé manuscrit, soit sur des critères purement géométriques. Nous appliquons notre méthodologie à la segmentation de tracés réels constitués de chiffres ou de lettres manuscrites. Nous montrons que les différentes méthodes que nous avons développées permettent de reconstruire en temps réel, de façon précise, robuste, complète et totalement autonome, un tracé manuscrit quelconque. Ces méthodes autorisent un codage des tracés manuscrits: une stratégie est mise en œuvre pour la sélection de la primitive la plus significative au sens d'un critère approprié Nous proposons une démarche qui tient compte du taux de réduction de données et de la précision de la description. Ces méthodes ont l'avantage de réduire considérablement la quantité d'information initiale tout en gardant la partie informative. Elles ont été appliquées sur des tracés manuscrits réels en vue de l'analyse de dessins ou d'écritures d'enfants de scolarité primaire.

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Petcu, Madalina. "Régularité et asymptotique pour les équations primitives". Paris 11, 2005. https://tel.archives-ouvertes.fr/tel-00011982.

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Ce mémoire composé de quatre chapitres, réunit des résultats sur l'existence, l'unicité et la régularité des solutions des Equations Primitives (EPs) des océans et de l'atmosphère, en dimension deux et trois d'espace (Chapitres 1--3), ainsi qu'une étude sur le comportement asymptotique des EPs quand le nombre de Rossby tend vers zero (Chapitre 4) ; les conditions aux limites sont de type périodique dans tous les cas. Dans le premier chapitre, on considère les EPs de l'océan en dimension deux d'espace (écoulement tridimensionnel indépendant de la variable y). On montre d'abord l'existence globale en temps d'une solution faible ainsi que l'existence et l'unicité d'une solution forte. Puis, on prouve l'existence d'une solution plus régulière (jusqu' à la régularité C-infini). Dans le deuxième chapitre on montre, pour un modèle semblable à celui du premier chapitre que, pour une force analytique en temps à valeurs dans un espace du type de Gevrey, et une donnée initiale dans un espace de Sobolev convenable, les solutions des EPs appartiennent, sur un certain intervalle de temps, à un espace de Gevrey. Le troisième chapitre est dans la continuité naturelle des deux premiers chapitres. On considère ici les EPs en dimension trois d'espace et on étudie la régularité du type de Sobolev et du type de Gevrey pour les solutions. Le dernier chapitre de la thèse est dédié à l'étude du comportement asymptotique des EPs (sous la forme introduite au premier chapitre), quand le nombre de Rossby tend vers zero. On arrive ici a "moyenner" la solution exacte très oscillante quand le nombre de Rossby est petit, en utilisant une méthode de renormalisation
This thesis, containing four chapters, studies the existence, uniqueness and regularity of the solutions of the Primitive Equations (PEs) of the oceans and the atmosphere in space dimensions 2 and 3 (Chapters 1--3), and also the asymptotic behavior of the PEs when the Rossby number goes to zero (Chapter 4); the boundary conditions considered here are periodical. In the first chapter, we consider the PEs of the ocean in a two-dimensional space (three dimensional motion independent of the y variable). We prove the existence, globally in time, of a weak solution and the existence and uniqueness of strong solutions. Moreover, we prove the existence of more regular solutions, up to C-infinity regularity. In the second chapter, for a model similar to the previous one, we prove that, for a forcing term which is analytical in time with values in a Gevrey space, the solutions of the PEs starting with the initial data in a certain Sobolev space become, for some positive time, elements of a certain Gevrey class. As a natural continuation of the work from the first two chapters, in the third chapter we consider the PEs in a 3D domain and we study the Sobolev and Gevrey regularity for the solutions. The last chapter of the thesis is devoted to the study of the asymptotic behavior when the Rossby number goes to zero, for the PEs in the form considered in the first chapter. The aim of this work is to average, using the renormalization group method, the oscillations of the exact solution when the Rossby number goes to zero, and to prove that the averaged solution is a good approximation of the exact oscillating solution

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Petcu, Madalina Elena. "Régularité et asymptotique pour les équations primitives". Phd thesis, Université Paris Sud - Paris XI, 2005. http://tel.archives-ouvertes.fr/tel-00011982.

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Theera-Umpon, Nipon. "Morphological granulometric estimation with random primitives and applications to blood cell counting /". free to MU campus, to others for purchase, 2000. http://wwwlib.umi.com/cr/mo/fullcit?p9974689.

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Iglesias, José. "A force control based strategy for extrinsic in-hand object manipulation through prehensile-pushing primitives". Thesis, KTH, Robotik, perception och lärande, RPL, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-220136.

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Object manipulation is a complex task for robots. It often implies a compromise between the degrees-of-freedom of hand and its fingers have (dexterity) and its cost and complexity in terms of control. One strategy to increase the dexterity of robotic hands with low dexterity is called extrinsic manipulation and its principle is to exploit additional accelerations on the object caused by the effect of external forces. We propose a force control based method for performing extrinsic in-hand object manipulation, with force-torque feedback. For this purpose, we use a prehensile pushing action, which consists of pushing the object against an external surface, under quasistatic assumptions. By using a control strategy, we also achieve robustness to parameter uncertainty (such as friction) and perturbations, that are not completely captured by mathematical models of the system. The force control strategy is performed in two different ways: the contact force generated by the interaction between the object and the external surface is controlled using an admittance controller, while an additional control of gripping force applied by the gripper on the object is done through a PI controller. A Kalman filter is used for the estimation of the state of the object, based on force-torque measurements of a sensor at the wrist of the robot. We validate our approach by conducting experiments on a PR2 robot, available at the Robotics, Perception, and Learning lab at KTH Royal Institute of Technology.
Att greppa och manipulera objekt är en komplex uppgift för robotar. Det innebär ofta en kompromiss mellan hand och fingrars frihetsgrader (fingerfärdighet) mot reglersystemets kostnad och komplexitet. Extrinsic manipulation är en strategi för att öka fingerfärdigheten hos robothänder, och dess princip är att utnyttja accelerationer på objektet som orsakas av yttre krafter. Vi föreslår en metod baserad på att reglerakraft för hantering av objekt i handen, genom en återkoppling av kraftmomentet. För detta ändamål använder vi en prehensile pushing action, där objektet puttas mot en yta, under kvasistiska antaganden. Genom att använda en reglerstrategi får vi en robusthet mot parametrars osäkerhet (som friktion) och störningar, vilka inte beskrivs av systemets model. Kraftkontrollstrategin utförs på två olika sätt: kraften mellan objektet och den yttre ytan styrs med en admittance controller medan en ytterligare styrning av applicerad gripkraft på objektet görs med en PI-reglerare. Ett Kalman filter används för att estimera objektets tillstånd, baserat på mätningar av kraftmoment via en sensor vid robotens handled. Vi utvärderar vårt tillvägagångssätt genom att utföraexperiment på en PR2-robot vid KTHs Robotics, Perception och Learning Lab.

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Charve, Frédéric. "Etude de phénomènes dispersifs en mécanique des fluides géophysiques". Phd thesis, Ecole Polytechnique X, 2004. http://tel.archives-ouvertes.fr/tel-00008754.

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L'introduction est composee de deux parties: apres avoir presente les fluides geophysiques et les principes qui conduisent au systeme des equations primitives, ainsi qu'a l'approximation quasigeostrophique, nous examinons les travaux effectues sur le systeme primitif ainsi que sur celui des fluides tournants.
Dans le deuxieme chapitre, nous obtenons formellement l'asymptotique pour la suite des solutions du systeme primitif lorsque le petit parametre epsilon tend vers zero. Ceci permet en outre de definir le tourbillon potentiel, primordial dans toute cette etude. Nous etudions ensuite la convergence dans le cadre des solutions de Leray.
Le troisieme chapitre est consacre a l'etude de la meme
convergence mais dans le cadre des solutions de Fujita-Kato.
Le dernier chapitre donne des renseignements beaucoup plus precis
concernant les vitesses de convergence, et nous prouvons aussi un
theoreme de convergence dans le cadre des poches de tourbillon.

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Tess, Claude. "Extraction de primitives mouvement en traitement d'images par modélisation de l'architecture des systèmes visuels biologiques". Nancy 1, 2000. http://www.theses.fr/2000NAN10014.

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Dans le cadre de la vision par ordinateur, ce mémoire, inspiré de l'observation du fonctionnement des systèmes visuels biologiques des primates, présente une approche d'extraction de primitives du mouvement issue de séquences d'images en niveaux de gris. La démarche traditionnelle en visionique, que nous avons rappelée sous une forme bibliographique (chapitre 2), consiste souvent à rechercher parmi la diversité des méthodes existantes, la succession d'outils qui offre les meilleurs résultats, puis de la généraliser par l'expérimentation. Mais les sytèmes développés sur ce principe manquent souvent d'universalité, alors que les systèmes visuels biologiques s'en acquittent fort bien. Nous nous en sommes inspirés, afin d'élaborer une approche plus naturelles à la résolution de problèmes de vision par ordinateur. Ainsi, le système visuel des primates par ses capacités d'adaptation, permet d'exécuter des tâches visuelles complexes (chapitre 3). Notre travail de modélisation architecturale et fonctionnelle des systèmes visuels biologiques (chapitre 4), utilisant les outils du traitement du signal, extrait des primitives spatio-temporelles telles que les segments ou encore les points anguleux, destinées à la reconstruction du mouvement global d'objets pesants, rigides et polyédriques. Nous n'abordons ici que l'aspect translation dans le plan. Notre réalisation, implémentée en Matlab et langage C++, comporte des modules séquentiels entre lesquels il est possible d'accéder aux informations intermédiaires du traitement. Cette recherche, très actuelle, nous semble riche en développements tant sur l'approche employée que sur les méthodes utilisées
Within the context of Computer Vision, this thesis presents a motion primitives extraction approach stemming from grey level image sequences, inspired from the observation of primates biological visual system functionning. Usual processes in Machine Vision, set out in a bibliographical form (chapter 2), often consists in seeking, tools succession which offers the best results among existing methods diversity, and then generalising it by experimentation. But systems developed on thid principle often miss universality, whereas biological visual systems fulfill very well. We took our inspiration from biological processes, in order to work out a more natural approach to Computer Vision prblems resolution. Thus, visual primates system by its adaptation capacities, allows to carry out complex visual tasks (chapter 3). Our work on architectural and functionnal modelling of biological visual systems (chapter 4), using signal reconstruction of heavy, rigid and polyhedral objects. We considered only translation in plane. Our realisation, implemented in Matlad and C++ language, is composed of sequential modules that allow to reach intermediate processing information. This typical research seems to us full of developments as well on the approach employed as on the methods used

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Libros sobre el tema "Primitive estimation"

Nieder, Andreas. Neuronal Correlates of Non-verbal Numerical Competence in Primates. Editado por Roi Cohen Kadosh y Ann Dowker. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199642342.013.027.

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Non-verbal numerical competence, such as the estimation of set size, is rooted in biological primitives that can also be explored in animals. Over the past years, the anatomical substrates and neuronal mechanisms of numerical cognition in primates have been unravelled down to the level of single neurons. Studies with behaviourally-trained monkeys have identified a parietofrontal network of individual neurons selectively tuned to the number of items (cardinal aspect) or the rank of items in a sequence (ordinal aspect). The properties of these neurons’ numerosity tuning curves can explain fundamental psychophysical phenomena, such as the numerical distance and size effect. Functionally overlapping groups of parietal neurons represent not only numerable-discrete quantity (numerosity), but also innumerable-continuous quantity (extent) and relations between quantities (proportions), supporting the idea of a generalized magnitude system in the brain. Moreover, many neurons in the prefrontal cortex establish semantic associations between signs and abstract numerical categories, a neuronal precursor mechanisms that may ultimately give rise to symbolic number processing in humans. These studies establish putative homologies between the monkey and human brain, and demonstrate the suitability of non-human primates as model system to explore the neurobiological roots of the brain’s non-verbal quantification system, which may constitute the phylogenetic and ontogenetic foundation of all further, more elaborate numerical skills in humans.

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Capítulos de libros sobre el tema "Primitive estimation"

Asano, Akira, Takeshi Ohkubo, Mitsuji Muneyasu y Takao Hinamoto. "Primitive and Point Configuration Texture Model and Primitive Estimation Using Mathematical Morphology". En Image Analysis, 178–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/3-540-45103-x_25.

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Ishikawa, Yuta, Ichiro Takeuchi y Ryohei Nakano. "Variational Bayes from the Primitive Initial Point for Gaussian Mixture Estimation". En Neural Information Processing, 159–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-10677-4_18.

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Yang, Lei, Liang Li, Chie Muraki Asano y Akira Asano. "Primitive and Grain Estimation Using Flexible Magnification for a Morphological Texture Model". En Mathematical Morphology and Its Applications to Image and Signal Processing, 190–99. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21569-8_17.

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Neubauer, R. y K. Voss. "Monocular pose estimation of circular primitives". En Computer Analysis of Images and Patterns, 464–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/3-540-60268-2_330.

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Cocias, Tiberiu T., Sorin M. Grigorescu y Florin Moldoveanu. "3D Structure Estimation from a Single View Using Generic Fitted Primitives (GFP)". En Communications in Computer and Information Science, 369–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38241-3_25.

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Maeda, Guilherme, Gerhard Neumann, Marco Ewerton, Rudolf Lioutikov y Jan Peters. "A Probabilistic Framework for Semi-autonomous Robots Based on Interaction Primitives with Phase Estimation". En Springer Proceedings in Advanced Robotics, 253–68. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60916-4_15.

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Calderero, Felipe y Ferran Marqués. "Image Analysis and Understanding Based on Information Theoretical Region Merging Approaches for Segmentation and Cooperative Fusion". En Handbook of Research on Computational Intelligence for Engineering, Science, and Business, 75–121. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-2518-1.ch004.

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This chapter addresses the automatic creation of simplified versions of the image, known as image segmentation or partition, preserving the most semantically relevant information of the image at different levels of analysis. From a semantic and practical perspective, image segmentation is a first and key step for image analysis and pattern recognition since region-based image representations provide a first level of abstraction and a reduction of the number of primitives, leading to a more robust estimation of parameters and descriptors. The proposed solution is based on an important class of hierarchical bottom-up segmentation approaches, known as region merging techniques. These approaches naturally provide a bottom-up hierarchy, more suitable when no a priori information about the image is available, and an excellent compromise between efficiency of computation and representation. The chapter is organized in two parts dealing with the following objectives: (i) provide an unsupervised solution to the segmentation of generic images; (ii) design a generic and scalable scheme to automatically fuse hierarchical segmentation results that increases the robustness and accuracy of the final solution.

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Actas de conferencias sobre el tema "Primitive estimation"

Enes, Aaron R. y Wayne J. Book. "Recursive algorithm for motion primitive estimation". En 2011 IEEE International Conference on Robotics and Automation (ICRA 2011). IEEE, 2011. http://dx.doi.org/10.1109/icra.2011.5980456.

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Li, Liang, Chie Muraki Asano y Akira Asano. "Dual primitive estimation for morphological texture analysis". En 2010 10th International Symposium on Communications and Information Technologies (ISCIT). IEEE, 2010. http://dx.doi.org/10.1109/iscit.2010.5664896.

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Wang, Shurun, Zhenghui Zhao, Xiang Zhang, Jian Zhang, Shiqi Wang, Siwei Ma y Wen Gao. "Improved entropy of primitive for visual information estimation". En 2016 Visual Communications and Image Processing (VCIP). IEEE, 2016. http://dx.doi.org/10.1109/vcip.2016.7805589.

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Li, Xia, Yen-Liang Lin, James Miller, Alex Cheon y Walt Dixon. "Primitive-Based 3d Building Modeling, Sensor Simulation, and Estimation". En IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2019. http://dx.doi.org/10.1109/igarss.2019.8899241.

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Zhang, Xiang, Shiqi Wang, Siwei Ma, Ruiqin Xiong y Wen Gao. "Towards accurate visual information estimation with Entropy of Primitive". En 2015 IEEE International Symposium on Circuits and Systems (ISCAS). IEEE, 2015. http://dx.doi.org/10.1109/iscas.2015.7168816.

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Jin, Weixuan, Jie Wang, Hongshu Liao y Lu Gan. "Estimation of primitive polynomial for m-sequence with finite sequence length". En 2018 IEEE 3rd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC). IEEE, 2018. http://dx.doi.org/10.1109/iaeac.2018.8577906.

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Yamaguchi, Yoshiyuki y Koji Takanashi. "Estimation of Buoyancy Change of an NTE Capsule Using PCM". En ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61045.

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A new device which has negative thermal expansion behavior has been developed. One of the authors named it “NTE capsule” for short. The NTE capsule is expected to enhance the heat transfer moving up and down in a top-heated water tank. Recently the authors developed a new NTE capsule using Phase Change Material (PCM). The motion of it in a top-heated water tank has already been analyzed by numerical calculation and its motion has already been observed by operation experiment. In this study, the propriety of primitive design model was discussed. For this purpose, the buoyancy change of a NTE capsule using PCM was measured and compared to an estimated value by a primitive design model. As the result, the correction of the design model which gave the prediction of the more precise buoyancy change was shown.

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Suzuki, Norikazu, Ryosuke Ikeda y Eiji Shamoto. "Primitive Study on Model-Based Process Identification by Utilizing Force Estimation Techniques". En ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8872.

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This study presents a new method to identify parameters representing cutting process and transfer function of flexible mechanical structures mounted on a traveling stage by utilizing only internal information of computerized numerical control (CNC) system. Disturbance force input to CNC is estimated by disturbance observer and cutting force is estimated based on cutting force model. Analyzing influence of the estimated cutting force on the disturbance force, parameters used in the assumed models of cutting process and structural dynamics are identified in quasi-real-time. Least square method (LSM) is utilized for the parameter identification. Face turning experiment using an ultra-precision machine tool was conducted to verify feasibility of the proposed method. Experimental results clarified that the cutting force coefficient and the modal parameters representing the dynamic characteristics of the force transfer function can be identified accurately by the proposed method.

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Sun, Guo-Jhen y Huei-Yung Lin. "Robotic Grasping Using Semantic Segmentation and Primitive Geometric Model Based 3D Pose Estimation". En 2020 IEEE/SICE International Symposium on System Integration (SII). IEEE, 2020. http://dx.doi.org/10.1109/sii46433.2020.9026297.

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Torii, Takuya y Manabu Hashimoto. "Model-less Estimation Method for Robot Grasping Parameters Using 3D Shape Primitive Approximation". En 2018 IEEE 14th International Conference on Automation Science and Engineering (CASE). IEEE, 2018. http://dx.doi.org/10.1109/coase.2018.8560417.

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