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2014 11th international conference on computer graphics, imaging and visualization, cgiv 2014

ISBN: (纸本)9781479957200

the proceedings contain 18 papers. the topics discussed include: an approach to describe parametric curves using Hough-based arc spline approximation;simplification of 3D triangular mesh for level of detail computation;shape preserving rational trigonometric spline curves;construction of cubic DP surface based on biharmonic partial differentiation equation;a survey of sketch based modeling systems;a thai penmanship application on iOS;relationship of interpolation and approximation curve conversion based on monomial form;a new general incremental algorithm for conic section;the analysis of PIA algorithm efficiency in converting rational Bézier curves into corresponding non-rational curves;texture feature analysis of digital fundus images for early detection of diabetic retinopathy;and non-subsampled contourlet transform based descriptors for gender recognition.

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A New General Incremental Algorithm for Conic Section 11

A New General Incremental Algorithm for Conic Section

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11th international conference on computer graphics, imaging and visualization (cgiv) - New Techniques and Trends

作者： Banissi, E. Golipour, M. K. London S Bank Univ Dept Informat London England

ISBN: (纸本)9781479957200

A new general rendering algorithm for conic sections is presented. Among its new features are: 1) curve tracking with no octant/ quadrant change control within the main repeating loop, reducing the inaccuracy of slope evaluation for octant change procedure. Quadrant change is controlled by multiple residue sign test 2) the sign of the curvature controls the direction of motion It is an 8- way stepping incremental algorithm, and the bet- fit criterion is based on midpoint calculations. Like the previous algorithms, only additions and sign tests are used in the main loops.

关键词： [computer graphicsGeneral] Line and Curve Generation curvature clockwise anticlockwise midpoint

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Simplification of 3D Triangular Mesh for Level of Detail Computation 11

Simplification of 3D Triangular Mesh for Level of Detail Com...

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11th international conference on computer graphics, imaging and visualization (cgiv) - New Techniques and Trends

作者： Ng, Kok-Why Low, Zhi-Wen Multimedia Univ Fac Comp & Informat Cyberjaya 43300 Selangor Malaysia

ISBN: (纸本)9781479957200

Advance three-dimensional (3D) scanning devices can create very detail complex 3D polygonal models. though the random access memory (RAM) and parallel computing in graphics card are enormously improved, many modelers still confront with intricacy of slow computing due to exponential increase of number of polygons for realistic look of surface models. In this paper, a simple and fast triangular mesh simplification method based on half-edge collapsed scheme is proposed. the Euclidean distance of each triangle edges and the disparity between two adjacent triangles are computed for decimation validation. the to-be-collapsed vertices and edges are conducted in priority queue data structure. the empirical results show that the proposed simplified model shape is well-preserved and is computation efficient. Two existing popular methods (FMLOD and FSIMP) are to be compared with the proposed method and the result demonstrates a rational outcome and is comparable in visual quality.

关键词： Simplification Level of Detail Triangular Mesh computer graphics 3D Models

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Relationship of interpolation and approximation curve conversion based on monomial form 11

Relationship of interpolation and approximation curve conver...

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2014 11th international conference on computer graphics, imaging and visualization, cgiv 2014

作者： Savetseranee, Dilokvith Dejdumrong, Natasha Department of Computer Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand

ISBN: (纸本)9781479957200

In computer Aided Geometric Design (CAGD), the utilization of using curves for geometric design and modeling is undertaken by most research works. Due to the high degree of shape preservation of the approximation curve and ease of configuration of the interpolation curve, they are commonly used in CAD and CAM application. However, there are very few works that pay attention to the integration and transformation of those types of curve in graphical modeling tools. In 2010, Aphirukmatakun et al [1] proposed the transformation scheme based on Monomial Form technique to transform the CAGD curve into Newton-Lagrange curve and vice versa. However, Newton-Lagrange has a limitation in dealing with loops curve and zigzag. In this paper, we propose an interpolation and approximation curve conversion scheme to provide more flexible and efficient conversion between them. To this end, we combine Chebyshev polynomial representation and monomial matrix conversion to develop a set of conversion algorithms. the paper presents how the curves are converted and it is considered to be feasible and sound to implement in CAGD application. © 2014 IEEE.

关键词： Chebyshev polynomials

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D-Art Gallery 2014

D-Art Gallery 2014

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international conference on computer graphics, imaging and visualization, cgiv

the Symposium and Gallery of Digital Art D-Art accompanies two annual international conferences: the Information visualization conference and the computer graphics, imaging, and visualization conference. this year the setup is as follows: Information visualization Society conference IVS - 18th international conference on Information visualization, iV14, 16- 18 July 2014, University of Paris Descartes, Paris,France, http://***/IV2014/. 11th international conference on computer graphics, imaging and visualization, 6-8 August, 2014, Nanyang Executive Centre, Nanyang Technological University, Singapore, http://***/cgiv2014/. Artists, scientists, mathematicians, and anyone using digital imagery and data, involved in visual storytelling, art, and graphics is invited to contribute.

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Guest Editor's Introduction: Special Section on the ACM SIGGRAPH/Eurographics Symposium on computer Animation (SCA)

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IEEE TRANSACTIONS ON visualization AND computer graphics 2014年第1期20卷 2-3页

作者： Kry, Paul G. Lee, Jehee McGill Univ Sch Comp Sci Montreal PQ H3A 0E9 Canada Seoul Natl Univ Dept Comp Sci Seoul 151744 South Korea

this special section presents expanded versions of three of the best papers from the 11th Annual ACM SIGGRAPH/Eurographics Symposium on computer Animation (SCA 2012), which was held in Lausanne, Switzerland, from 29-31 July 2012. SCA has established itself as the premier conference dedicated specifically to innovations in the software and technology of computer animation. SCA 2012 received 80 submissions and each submission was reviewed by at least three members of the international program committee. After a thorough online discussion, the 72-member international program committee decided on the 27 full papers and nine short presentation papers accepted for the final program. Out of 27 full papers, the symposium's Best Papers Award Committee selected one best paper, two runner-ups, and four honorable mentions. the selection was informed by the original reviews and the conference presentations. We are delighted to present three out of the six very best papers of SCA 2012 invited for this special section. Each of the invited papers contains a minimum of 30 percent new material and received at least three reviews, including one reviewer not among the original SCA reviewers.

关键词： Special Issues And Sections Meetings computer graphics visualization

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Principles of visual design for computer music 40

Principles of visual design for computer music

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40th international computer Music conference, ICMC 2014, Joint with the 11th Sound and Music Computing conference, SMC 2014 - Music Technology Meets Philosophy: From Digital Echos to Virtual Ethos

作者： Wang, Ge Stanford University United States

ISBN: (纸本)9789604661374

this paper presents observations pertaining to elements of expressive visual design for computer music, focusing in particular on real-time integration of graphics and audio. Specific projects are presented as examples and case studies supporting a set of design principles. they range from "user-oriented" to "aesthetic" and additional observations. Examples are categorized into audio visualization, game-like interfaces, and mobile instruments. Copyright: © 2014 Ge Wang.

关键词： Audio acoustics

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A New General Incremental Algorithm for Conic Section

A New General Incremental Algorithm for Conic Section

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international conference on computer graphics, imaging and visualization, cgiv

作者： E. Banissi M.K. Golipour Department of Informatics London South Bank University London UK

A new general rendering algorithm for conic sections is presented. Among its new features are: 1) curve tracking with no octant/quadrant change control within the main repeating loop, reducing the inaccuracy of slope evaluation for octant change procedure. Quadrant change is controlled by multiple residue sign test 2) the sign of the curvature controls the direction of motion It is an 8-way stepping incremental algorithm, and the bet-fit criterion is based on midpoint calculations. Like the previous algorithms, only additions and sign tests are used in the main loops.

关键词： Approximation algorithms Algorithm design and analysis Rendering (computer graphics) Clocks Approximation methods Splines (mathematics) Vectors

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Object Tracking Using Dimension Reduction of Descriptive Features

Object Tracking Using Dimension Reduction of Descriptive Fea...

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international conference on computer graphics, imaging and visualization, cgiv

作者： Cong Lin Chi-Man Pun Department of Computer and Information Science University of Macau Macau SAR China

In this paper, we proposed a novel feature refining method for object tracking using vectorized texture feature. Our contributions are three-fold: 1) an statistical discriminative appearance model using texture feature was proposed. 2) majority of dimensions of the features are removed by judging their errors of the chosen distribution model. the remaining dimensions are most discriminative ones for classification task. the dimension reduction has advantages of reducing the computational cost in classification stage. 3) an adaptive learning rate was proposed to handle drifts caused by long term occlusion. Experimental results are satisfactory and compared to state-of-the-art object tracking methods.

关键词： Decision support systems Object tracking Computational modeling imaging visualization Refining

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the Analysis of PIA Algorithm Efficiency in Converting Rational Bézier Curves into Corresponding Non-rational Curves

The Analysis of PIA Algorithm Efficiency in Converting Ratio...

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international conference on computer graphics, imaging and visualization, cgiv

作者： Anchisa Chantakamo Natasha Dejdumrong Department of Computer Engineering King Mongkut's University of Technology Bangkok Thailand

this paper presents an efficient method to approximate a rational Bézier curve by the corresponding Non- Rational Bézier curve using Progressive Iterative Approximation (PIA) with the algorithm efficiency analysis. the proposed method samples the input curve into data points and uses a PIA algorithm to calculate new control points for the nonrational curve. the experimental results show that the proposed method has less computational complexity, which yields less computational time, than other methods which approximate the curve using power basis or monomial form conversion. this work also presents the method to find the appropriate degree of the output non-rational curve for each degree-n rational curve input.

关键词： Approximation algorithms Algorithm design and analysis Approximation methods Polynomials computers Computational complexity computer graphics

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