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检索条件"任意字段=Conference on Visual Data Exploration and Analysis II"

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visualization for enhancing the data mining process

Visualization for enhancing the data mining process

引用

conference on data Mining and Knowledge Discovery - Theory, Tools, and Technology iiI

作者： Meneses, CJ Grinstein, GG Univ Massachusetts Dept Comp Sci Lowell MA USA

ISBN: (纸本)0819440795

visualization has proved to be a suitable paradigm for the analysis and exploration of datasets. In the data mining cycle: visualization has been mainly focused on data visualization and output generation. However, besides datasets, many other entities need to be explored and understood by users and analysts. In this paper, we describe the role of visualization in the data mining process, and we present a model to support the interaction between users and data mining entities. We discuss visualizations of datasets, parameter spaces of data mining algorithms, models induced from datasets, and patterns generated by the application of data mining algorithms to datasets. We have developed a Java-based testbed, that implements the extended data mining model with visual support to interact with datasets, models, parameter spaces, and patterns. Experimental results based on several public datasets, data mining algorithms, multidimensional visualization techniques, and other novel visualizations, show clearly the benefits of the integration of visualization in the data, mining process.

关键词： data mining model visual data mining model visualization parameter selection

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Use of natural sounds and metaphors for data perceptualization

Use of natural sounds and metaphors for data perceptualizati...

引用

8th Meeting of the visual data exploration and analysis conference

作者： Lodha, SK Venable, E Marsh, D Meads, D Manh, N Robinson, C Roskin, K Univ Calif Santa Cruz Santa Cruz CA 95064 USA

ISBN: (纸本)0819439800

We describe three systems that use natural or event-based sounds as means of data delivery. In these systems we have mapped data to natural sounds using metaphors. In the first system we evaluate the use of sounds of air, horn, and train to convey ordered numeric values between 1 to 6. An example of the metaphor used here is the association of speed values to the sound of a moving train at different speeds. In the second system, we use sounds of ocean waves to convey whether the exposure in a protein structural alignment is buried, partially exposed or fully exposed. The metaphor used here is the association of sound with how exposed the user is with respect to the ocean. In the third system, we map animal sounds such as the sound of a roaring lion or a chirping bird to certain stocks based on user preferences. The behavior of the stocks are then sounded by the use of whistles (up or down) and car crash to signify the movement in prices of the stocks. An up whistling sound can be clearly associated with an uptrend. We present and discuss the results of user evaluation studies for all the three systems.

关键词： sonification perceptualization metaphors natural sounds data mapping protein alignment stocks

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A Classification Canvas for the analysis of biomedical data

A Classification Canvas for the analysis of biomedical data

引用

Canadian conference on Electrical and Computer Engineering

作者： Demko, AB Pizzi, NJ Somorjai, RL Natl Res Council Canada Inst Biodiagnost Winnipeg MB R3B 1Y6 Canada

ISBN: (纸本)0780367154

With the rapid proliferation of complex high-dimensional biomedical data, an acute need exists for a comprehensive, knowledge-based, domain-specific, user-friendly software suite that allows investigators, in the health care disciplines, to classify their data through the detection of novel or discriminating features therein. The Classification Canvas is an attempt to achieve these goals in addition to providing intuitive visual computation and logic construction. In this paper we describe various design and implementation issues such as: balancing user (novice) friendliness and developer (experienced) utility, performance versus modularity trade-offs, C++ and Java data sharing responsibilities, and creating graphical interfaces for (user-supplied) algorithm control.

关键词： Biomedical engineering

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visualization of adaptive mesh refinement data

Visualization of adaptive mesh refinement data

引用

8th Meeting of the visual data exploration and analysis conference

作者： Weber, GH Hagen, H Hamann, B Joy, KI Ligocki, TJ Ma, KL Shalf, JM Univ Calif Davis Dept Comp Sci Ctr Image Proc & Integrated Computing Davis CA 95616 USA

ISBN: (纸本)0819439800

The complexity of physical phenomena often varies substantially over space and time. There can be regions where a physical phenomenon/quantity varies very little over a large extent. At the same time, there can be small regions where the same quantity exhibits highly complex variations. Adaptive mesh refinement (AMR) is a technique used in computational fluid dynamics (CFD) to simulate phenomena with drastically varying scales concerning the complexity of the simulated variables. Using multiple nested grids of different resolutions, AMR combines the topological simplicity of structured-rectilinear grids, permitting efficient computation and storage, with the possibility to adapt grid resolutions in regions of complex behavior. We present methods for direct volume rendering of AMR data. Our methods utilize AMR grids directly for efficiency of the visualization process. We apply a hardware-accelerated rendering method to AMR data supporting interactive manipulation of color-transfer functions and viewing parameters. We also present a cell-projection-based rendering technique for AMR data.

关键词： volume visualization direct volume rendering adaptive mesh refinement computational fluid dynamics multiresolution method multigrid technique hardware-accelerated rendering

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Reconfigurable media processing

Reconfigurable media processing

引用

2nd International conference on Information Technology - Coding and Computing (ITCC 2001)

作者： Dasu, A Panchanathan, S Arizona State Univ Visual Comp & Commun Lab Tempe AZ 85287 USA

ISBN: (纸本)0769510620

Multimedia processing is becoming increasingly important with a range of applications. Existing approaches for processing multimedia data can be broadly classified into two categories, namely (i) Microprocessors with extended media processing capabilities, and (ii) Dedicated implementations (ASICs). The complexity, variety of techniques and tools associated with multimedia processing points to the opportunities for Reconfigurable computing devices which will be able to adapt the underlying hardware dynamically in response to changes in the input data or processing environment. This paper proposes a novel approach to design a dynamically reconfigurable processor by performing hardware software co-design for a media processing application. As an example, the analysis of the Shape coding module of MPEG-4 is chosen to demonstrate the potential for reconfigurability.

关键词： Application programs

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Image photometry applied to measuring visual displays

Image photometry applied to measuring visual displays

引用

Thin Film Transistor Flat Panel Display Technology and Applications/Display Metrology ii conference

作者： Tansley, B Moggridge, T Lumetrix Corp Ottawa ON K1Z 8L8 Canada

ISBN: (纸本)0819439738

The image photometer measures the photometric characteristics of part or all of a scene stored as photometrically valid image data obtained from a calibrated electronic camera. The technology can offer significant advantages over other photometric methods for measuring visual displays where: the information content in the display measurements is moderate to large. photometric readings must be obtained from irregularly shaped regions in the display and/or from many regions distributed throughout the display. repetitive photometric measurements must be taken on a succession of similar parts.. numerical analysis of the photometric data is required. timely decisions must be made based upon photometric analysis. summary documentation must be produced. archiving measured data, analyses and/or summary reports is required. photometric results must be compared to one or more standards. We review the characteristics of the components of the image photometer and its calibration and discuss how they affect the validity and reliability of its measurements. We also discuss how specific design features affect the robustness and ease of use of the display measurement process. The costs and benefits of image photometry are compared to the current alternative photometric measurement technologies.

关键词： image photometry validity reliability measurement automation displays

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Retrieving land surface parameters over Sahel from ERS Wind Scatterometer data

Retrieving land surface parameters over Sahel from ERS Wind ...

引用

conference on Remote Sensing for Agriculture, Ecosystems, and Hydrology ii

作者： Jarlan, L Mazzega, P Mougin, E Frison, PL Lab Etud Geosphys & Oceanog Spatiale Toulouse France

ISBN: (纸本)0819438278

Wind Scatterometers are active microwave instruments with low spatial resolution and high sampling rate. Recent studies have shown high potentials of these data to monitor land surface parameters over semi-arid areas, including the soil moisture and the vegetation herbaceous mass. The objective of this study is to evaluate the potentialities of the ERS Wind Scatterometer to retrieve land surface parameters. After a brief presentation of the model used for the interpretation of sigma (0) time series, the inverse problem aiming at estimating herbaceous mass and soil moisture time series given the ERS WSC data is analysed. Due to the strong spatial and temporal variability of the soil moisture, the inverse problem appears to be a priori under-determined. We then solve the inverse problem with a "brute force" approach that consists in systematical exploration of the parameter space. This method does not only allow to obtain the optimal solutions like more classical method (generalised least square, simplex), but also the whole domain of admissible solutions. analysis of this domain provides interesting results for the inverse problem subtle understanding.

关键词： wind scatterometer Sahel backscattering model inversion soil moisture herbaceous mass

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A study of microscopic images of human breast disease using competitive neural networks

A study of microscopic images of human breast disease using ...

引用

Canadian conference on Electrical and Computer Engineering

作者： Allan, R Kinsner, W Univ Manitoba Signal & Data Compress Lab Dept Elect & Comp Engn Winnipeg MB R3T 5V6 Canada

ISBN: (纸本)0780367154

Competitive neural networks offer a unique opportunity to extract features from medical images objectively. An advantage of this approach is that medical image analysis could be automated or semi-automated. This automation could lead to improved precision and accuracy of diagnostic interpretation, while semi-automation could achieve much the same goal and would serve as a natural stepping-stone to full automation. This paper shows that all types of competitive neural networks can extract general features from images obtained through a microscope of four types of human breast disease, two benign and two malignant. Assessed qualitatively, the features broadly encompass thresholding and edge detection. These features are extracted regardless of supervision or lack of supervision. To visual inspection, there are no obvious sharp distinctions between benign and malignant diagnoses, the most important distinction in tissue diagnosis.

关键词： Feature extraction

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A robust machine vision system design to facilitate the automation of surface appearance inspections

A robust machine vision system design to facilitate the auto...

引用

IEEE/ASME International conference on Advanced Intelligent Mechatronics (AIM 01)

作者： Parker, JM Univ Kentucky Dept Mech Engn Lexington KY 40506 USA

ISBN: (纸本)0780367367

The performance demands on coated surfaces (ag., automotive paints) are considerable. Though the primary purpose of automotive paints is to protect the car body from corrosion, it has been well established that the appearance of a painted surface greatly affects a customer's perception of that product's quality. Automotive manufacturers spend considerable sums on the painting process during manufacturing and, again, on warranty-covered claims of paint-related problems. Therefore robust methods to both characterize and monitor surface quality are critical. Existing quality control methods using expert inspectors are generally effective in assessing perceived appearance, however, they are often labor intensive, time-consuming and can be subjective. Optical techniques conducted offline are generally robust and objective;however, they are not always effective in assessing perceived surface appearance. Furthermore, neither option effectively determines and maintains optimal processing conditions to consistently produce a quality finish and mitigate defects An intelligent automated proem that incorporates the effects of perception can facilitate an effective analysis of surface quality and appearance, in addition to maintaining optimal processing conditions for producing a desirable appearance. A long-term research goal is the development of a robust automated, in-line monitoring system which controls critical painting process parameters bayed, in part upon captured image data which correlates strongly with human visual assessment As a significant first step, this paper presents captured images and derived image attributes that correlate strongly with both objective measurements and a visual ranking of specular painted samples.

关键词： Systems analysis

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Inventing discovery tools: Combining information visualization with data mining 12th

引用

12th Annual conference on Algorithmic Learning Theory, ALT 2001

作者： Shneiderman, Ben Department of Computer Science Human-Computer Interaction Laboratory Institute for Advanced Computer Studies and Institute for Systems Research University of Maryland College ParkMD20742 United States

ISBN: (纸本)3540428755

The growing use of information visualization tools and data mining algorithms stems from two separate lines of research. Information visualization researchers believe in the importance of giving users an overview and insight into the data distributions, while data mining researchers believe that statistical algorithms and machine learning can be relied on to find the interesting patterns. This paper discusses two issues that influence design of discovery tools: statistical algorithms vs. visual data presentation, and hypothesis testing vs. exploratory data analysis. I claim that a combined approach could lead to novel discovery tools that preserve user control, enable more effective exploration, and promote responsibility. © Springer-Verlag Berlin Heidelberg 2001.

关键词： data mining

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