Razvan Tudor Tanasie

University of Craiova, Croiova, Dolj, Romania

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Publications (15)0 Total impact

  • Source
    Dorian Cojocaru · Dorin Popescu · Razvan Tudor Tanasie · Laura Grindei · Tony Ward
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    ABSTRACT: The objective of the work package Policy of the LLP SALEIE project is to bring together policy administrators from institutions across Europe in order to review current practices and to identify examples of best practice. This would help build a common understanding of governance and policy implications on the strategic changes associated with the project, and create a centre for excellence in the policy area. Amongst the tools proposed to be used in the frame of SALEIE project, surveys play a major role. This paper deals with the problem of best practice examples identification based on the analysis of the data collected using the questionnaire of the survey.
    Full-text · Conference Paper · May 2014
  • D. Cojocaru · D. Popescu · R.T. Tanasie
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    ABSTRACT: This paper deals with the process of identification of the needed changes within higher education to meet future challenges. The work is related with the work package Policy of the LLP SALEIE program “Strategic Alignment of Electrical and Information Engineering in European Higher Education Institutions”. The analysis includes a review of the needs and impact of administrative policy as it impacts the design, development, delivery, assessment and review of academic programmes. The final objective of this global task is to bring together policy administrators from institutions across Europe to review current practices and to identify examples of best practice, to build a common understanding of governance and policy implications on the strategic changes associated with the project, and create a centre for excellence in the policy area. The paper presents the designing process of a questionnaire regarding the above problems. The objective is to achieve as broad coverage of European higher education institutional responses as possible.
    No preview · Conference Paper · Jan 2013
  • M Popescu · M Pancu · R T Tanasie
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    ABSTRACT: In this paper we solve the problem of domain pool classification in fractal volume coding using all symmetries of a cube. Using the algorithms described in the article we are able to perform useful Domain-Range comparisons and achieve better compression rates while not loosing fidelity. In this paper we take advantage of the symmetric permutation group of cube and decrease the number of classes (from 10080 to 840). The same transformations are used in the compression and so we will have a better approximation of the final compressed volume. This paper represents a work in progress so no experimental results can be provided at this time.
    No preview · Conference Paper · Jan 2012
  • M. Popescu · R.T. Tanasie
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    ABSTRACT: In this paper we present a graph-based volumetric data segmentation method based on a 3D hexagonal prismatic lattice. We evaluate the advantages and disadvantages of using this lattice in contrast with classic ones. One of the main advantages are high isoperimetric quotient, near equidistant neighbours (ability to represent curves better, resulting in a better segmentation) and high connectivity. Disadvantages are due to the main stream lack of interest in this area and thus data sets must be converted back and forth from rectangular to hexagonal latices both in acquisition and visualization processes.
    No preview · Conference Paper · Jan 2012
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    ABSTRACT: This paper deals with the subject of visual control of a hyper-redundant robot. This type of arm changes its configuration by bending a continuous backbone formed of sections connected in a serial configuration. Such tentacle arm has a variable length and theoretically it can achieve any position and orientation in the 3D space. A tentacle arm prototype was designed and the practical realization is now running. The mathematical modeling of such a robot takes under consideration both the kinematics and dynamics approach. A development environment for visual servoing application was designed and implemented. This environment includes both tools for simulating visual servoing algorithms (a graphic simulator), as well as tools for controlling hyper-redundant robots using a closed loop video control system. The visual servoing system does not answer in real time. The delay introduced by the image processing task is taken into consideration and simulations are performed trying to find a solution for this problem.
    No preview · Conference Paper · Jul 2010
  • Mihai Popescu · Mihai Sorin Tudorache · Razvan Tudor Tanasie
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    ABSTRACT: Current technology has made possible to scan volumes with ease and thus huge amount of data is generated. Devising algorithms to efficiently store and index this data is an open challenge. In this article we propose a theoretical approach to volume indexing by extending the idea of using fractal compression to index images, to the third dimension. The described technique uses a classification method that greatly improve the exponential complexity of the volume fractal coding. The compressed volume can then be used to be indexed in a digital library in a more efficient way. Then, content-based similarity queries can take full advantage of the self-similarity property of fractals. All these features will be present in an application that is currently under development.
    No preview · Conference Paper · Jul 2010
  • Source
    Dorian Cojocaru · Mircea Ivanescu · Razvan Tudor Tanasie · Sorin Dumitru · Florin Manta
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    ABSTRACT: An ideal tentacle manipulator is a non-conventional robotic arm with an infinite mobility. It has the capability of taking sophisticated shapes and of achieving any position and orientation in a 3D space. A tentacle manipulator is a hyper redundant or hyper degree of freedom manipulator. Hyper redundant robots produce changes of configuration using a continuous backbone made of sections which bend. The lack of no discrete joints is a serious and difficult issue in the determination of the robot's shape. A solution for this problem is the vision based control of the robot, kinematics and dynamics. A tentacle arm prototype was designed and the practical realization is now running. The control system is an image based visual servo control where the error control signal is defined directly in terms of image feature parameters.
    Full-text · Conference Paper · Jun 2010
  • Source
    Mihai Tudorache · Mihai Popescu · Razvan Tanasie

    Preview · Conference Paper · Jan 2010
  • Source
    Mihai Tudorache · Mihai Popescu · Razvan Tanasie
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    ABSTRACT: In this article we intend to present a method of obtaining high complexity sinthetic scenes by using simple volumes as the building blocks. The below described method can be used to obtain both homogenous and heterogenous volumes. This is done by combining volumes of different voxel densities. Index Terms—volumetric data, voxel, constructive solid geom-etry, volume modelling, constructive volume geometry.
    Full-text · Article · Jan 2010
  • D. Cojocaru · R.T. Tanasie
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    ABSTRACT: Hyperredundant robots produce changes of configuration using a continuous backbone made of sections which bend. The lack of no discrete joints is a serious and difficult issue in the determination of the robot's shape. A solution for this problem is the vision based control of the robot, kinematics and dynamics. Camera calibration is the essential procedure for all such applications: positioning and orienting the cameras in order to support the accuracy of the image features extraction. The calibration for a pan/tilt/zoom camera shape is achieved by means of an engineered environment and a graphic simulation module. The paper presents experimental details showing the effectiveness of the technique used with the hyperredundant manipulator.
    No preview · Article · Jan 2009
  • Source
    Razvan Tudor Tanasie · Dorian Cojocaru
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    ABSTRACT: A kinematical 3D model for hyper-redundant robots is created. A development environment for control applications for tentacle robots is created. This environment includes a personal library of mathematical functions typical for tentacle robots, a complex graphical engine to represent realist animations to illustrate the plane motion of the hyper-redundant robots, and a library of programming functions for creating, accessing, modification and destroying the instances of the different implemented classes. The advantages of such an application are numerous, the costs reduction and educational use of the simulator being the most important.
    Preview · Conference Paper · Oct 2008
  • Source
    Dorian Cojocaru · Razvan Tudor Tanasie
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    ABSTRACT: In this presentation we discuss methods for 3D reconstruction from a single 2D shot using multiple stripe line projection. We also present 3D recognition strategies with an application example to 3D face recognition. The technology has been developed ...
    Preview · Conference Paper · Aug 2008
  • Source
    R Tanasie · M Popescu · D Bogheanu · G Ciocoiu · D Cojocaru
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    ABSTRACT: This paper presents a software that creates a fractal screensaver. The application generates both fractal images and music based on the Julia and Mandelbrot fractals. The four coloring algorithms implemented are founded on: escape-time, distance estimators, escape angle and curvature estimation algorithm. The music is created for different instruments on 32 voices. The horizontal scan is an 1/32 notes at a tempo of quarter note with the value 60. The iteration data from the Julia calculations is mapped to key velocity. The higher the iteration result, the louder the pitch presence. The application is configurable and permits the user to select the color palette, a region in the fractal and even the instruments to be played.
    Full-text · Conference Paper · Jan 2007
  • Razvan Tudor Tanasie · Dorian Cojocaru

    No preview · Conference Paper · Jan 2007
  • D. Cojocaru · R.T. Tanasie
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    ABSTRACT: Developing visual servoing applications needs a versatile software system. Starting from the ViSP architecture model, a general structure for the software system was developed. The project is financed by Romanian National University Research Council CNCSIS. Software modules were already implemented in beta versions: computer graphics procedures for robotic application visualization and simulation and image processing procedures for visual servoing applications. Fuzzy algorithms and methods were used in order to support the implementation of the image processing procedures.
    No preview · Article · Nov 2006
  • Source
    DORIAN COJOCARU · RAZVAN TUDOR TANASIE
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    ABSTRACT: This paper presents a project dealing with visual servoing applications. A general structure for the software system was developed starting from the ViSP architecture model (1). Software modules were already implemented in beta versions: computer graphics procedures for robotic applications visualization and simulation and image processing procedures for visual servoing applications. Fuzzy algorithms and methods were used in order to support the implementation of the image processing procedures. The project is financed by Romanian National University Research Council CNCSIS.
    Full-text · Article · Jan 2006