When creating interactive applications for data exploration three major challenges can be identified: The integration of heterogeneous data sources at runtime, the integration of suitable visualization methods and the...
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ISBN:
(纸本)9789898425461
When creating interactive applications for data exploration three major challenges can be identified: The integration of heterogeneous data sources at runtime, the integration of suitable visualization methods and the availability of interaction methods which enable domain experts to (implicitly) apply their expert knowledge in the knowledge driven exploration process. To address these challenges we introduce the KnoVA (Knowledge-Based Visual Analytics) reference model, which allows for generating a description of visualization methods, interaction methods and data sources. We then outline how this model can be useful to create knowledge based visual analytics systems in a model driven software development process.
In this paper we describe a trace analysis framework, from trace generation to visualization. It includes a unified tracing facility on IBM® SPTMsystems, a self-defining interval file format, an API for framework...
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The near-photographic quality of the video graphics array (VGA), in an MS-DOS environment, lends itself to the development of computer-assisted instruction models. A clinical simulation has been produced for radiograp...
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ISBN:
(纸本)0879425598
The near-photographic quality of the video graphics array (VGA), in an MS-DOS environment, lends itself to the development of computer-assisted instruction models. A clinical simulation has been produced for radiography education which allows clinical decision making. The VGA gray-scale display capabilities are adapted to produce radiographic images, patient assessment, equipment evaluation displays, and critical analyses. User control and multiple patient-centered scenarios allow students to develop and practice clinical decision-making skills.
This book constitutes the refereed proceedings of the 10th internationalconference on Articulated Motion and Deformable Objects, AMDO 2018, held in Palma de Mallorca, Spain, in July 2018.;The 12 papers pres...
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ISBN:
(数字)9783319945446
ISBN:
(纸本)9783319945439
This book constitutes the refereed proceedings of the 10th internationalconference on Articulated Motion and Deformable Objects, AMDO 2018, held in Palma de Mallorca, Spain, in July 2018.;The 12 papers presented were carefully reviewed and selected from 26 submissions. The papers address the following topics: advanced computergraphics and immersive videogames; human modeling and animation; human motion analysis and tracking; 3D human reconstruction and recognition; multimodal user interaction and applications; ubiquitous and social computing; design tools; input technology; programming user interfaces; 3D medical deformable models and visualization; deep learning methods for computer vision and graphics; and multibiometric.
We have developed a collaborative scheme that facilitates active human supervision of the binary segmentation of an echocardiogram. The scheme complements the reliability of a human expert with the precision of segmen...
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ISBN:
(纸本)0819411388
We have developed a collaborative scheme that facilitates active human supervision of the binary segmentation of an echocardiogram. The scheme complements the reliability of a human expert with the precision of segmentation algorithms. In the developed system, an expert user compares the computer generated segmentation with the original image in a user friendly graphics environment, and interactively indicates the incorrectly classified regions either by pointing or by circling. The precise boundaries of the indicated regions are computed by studying original image properties at that region, and a human visual attention distribution map obtained from the published psychological and psychophysical research. We use the developed system to extract contours of heart chambers from a sequence of two dimensional echocardiograms. We are currently extending this method to incorporate a richer set of inputs from the human supervisor, to facilitate multi-classification of image regions depending on their functionality. We are integrating into our system the knowledge related constraints that cardiologists use, to improve the capabilities of our existing system. This extension involves developing a psychological model of expert reasoning, functional and relational models of typical views in echocardiograms, and corresponding interface modifications to map the suggested actions to image processing algorithms.
Multicore processors are now the standard CPU architecture, and multithreaded parallel programs are needed to take full advantage of such CPUs. New tools are needed to help students learn how to design and build such ...
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The ability to interactively visualize the complex products of three-dimensional simulations is a key aspect in the validation and verification process of numerical algorithms and frameworks. Computational astrophysic...
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The ability to interactively visualize the complex products of three-dimensional simulations is a key aspect in the validation and verification process of numerical algorithms and frameworks. Computational astrophysics, which benefits from the rapidly increasing computing resources offered by the use of massively parallel mainframes, is a challenging play ground to scientific visualization. In this paper, we describe a graphical package developed in the framework of IDL object graphics. The requirements governing its design are defined in the context of the COAST software project which aims at providing an ensemble of enabling tools and techniques for the development and the validation of major simulation codes. This covers a wide range of applications, including cosmological formation of large-scale structures, turbulences in the interstellar medium, stellar magnetohydrodynamics, and formation of proto-planetary systems. The use of IDL object graphics provides an interactive and immersive visualization of complex scenes where various fields of different nature are entangled. Three-dimensional scalar and vector fields distributed over regular mesh grids or more complex structures such as adaptive mesh refinement data, as well as N-body systems, can be visualized in a number of different, complementary ways.
The immaturity of semantic search engines has initiated researchers to apply various novel postprocessing techniques on traditional search engine results among which clustering routines are most conspicuous. While man...
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The immaturity of semantic search engines has initiated researchers to apply various novel postprocessing techniques on traditional search engine results among which clustering routines are most conspicuous. While many of these routines are focused on hierarchical clustering, little has been done toward an effective visualization of such data. Due to the richness of information observed in 3D in comparison with 2D (because of its abundant visual cues), we have proposed an intuitive 3D metaphor for the visualization of hierarchical clustered results. Our metaphor is based on fractal trees which are usually constructed by linear recursive algorithms traversing node-link hierarchies. The search results of different hierarchical clustering algorithms shall be visualized as either single-tree or forest metaphors which are user's customizable alternatives in our implemented prototype. In the forest depiction, our approach is even applicable to flat clustered results.
We conducted a study on the perception towards videogames among pre-service teachers in three Regional Teachers' Training Centers in Morocco (Centres Régionaux des Métiers de l'Education et de la For...
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We conducted a study on the perception towards videogames among pre-service teachers in three Regional Teachers' Training Centers in Morocco (Centres Régionaux des Métiers de l'Education et de la Formation (CRMEF)). 180 pre-service teachers responded to our primary general survey which mainly focused on their perceptions and attitudes towards the integration of video games in the classroom. We then conducted two training and sensitization sessions with 40 of these trainees on how to make and integrate games in the classroom. We centered our training sessions on the use of the SCRATCH tool which is an open source environment facilitating videogame creation. At the end of these training sessions, we conducted another survey to measure the evolution of their perceptions towards educational video games. This comparative study showed a considerable progress and a better awareness of these pre-service teachers about the potential of serious games in the classroom. All participants appreciated Scratch and its potential as a learning environment. They highlighted the importance of including serious games in class and their need for extra training on the subject. Two of these pre-service teachers, lately adopted this innovative approach and implemented it in their final projects. They have developed and successfully experimented one mathematics lesson using the serious game "Timez ATTACK" with grade three students.
In this paper, we describe two different pipelines for visualizing multi-channel cell image volumes. We obtained six different multi-channel three-dimensional cell image datasets from the Cell Image Library (CIL);a fr...
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