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Computer Graphics, Imaging and Visualisation (CGIV 2007)最新文献

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Conceptual Design: An Operational Prescription for a Computer Support System 概念设计:计算机支持系统的操作处方
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.30
Oren Shapir, G. Goldschmidt, A. Yezioro
{"title":"Conceptual Design: An Operational Prescription for a Computer Support System","authors":"Oren Shapir, G. Goldschmidt, A. Yezioro","doi":"10.1109/CGIV.2007.30","DOIUrl":"https://doi.org/10.1109/CGIV.2007.30","url":null,"abstract":"A prescription for a computer based support system for conceptual design is presented. The necessary components needed are listed, and their implementation in a complete system is shown. Combining the components with the right balance among them is the key to a successful transition of today's conceptual design phase, using pencil and paper, to a computer based system. This work presents ConceptUdraft, a computer system built using this prescription. It allows the creative freedom of freehand 2D and 3D sketching the designer habitually relies on, assists that creative process and elevates it to a higher degree of visualization and interaction. The system developed may contribute to the quality of design and the speed with which conceptual design matures into a feasible new object.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130670546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Shape Recovery Using HDR Images 形状恢复使用HDR图像
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.74
Zuoyong Zheng, Lizhuang Ma, Zhou Zeng
{"title":"Shape Recovery Using HDR Images","authors":"Zuoyong Zheng, Lizhuang Ma, Zhou Zeng","doi":"10.1109/CGIV.2007.74","DOIUrl":"https://doi.org/10.1109/CGIV.2007.74","url":null,"abstract":"In this paper, an effective method for shape recovery using HDRI (high dynamic range images) is proposed. Firstly, an accurate reflectance map for a reference sphere relating its radiance values and corresponding normals is established, then the set of candidate normals of each target point comprising the same material are found by comparing its radiance to that of each reference sphere point. At last, a smoothness operation is applied to the normals to obtain a reasonable result, and the height values can be recovered. The experiment results show the performance of our approach.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123841759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Adaptive Block-Based Singular Value Decomposition Filtering 基于块的自适应奇异值分解滤波
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.15
Napa Sae-Bae, S. Udomhunsakul
{"title":"Adaptive Block-Based Singular Value Decomposition Filtering","authors":"Napa Sae-Bae, S. Udomhunsakul","doi":"10.1109/CGIV.2007.15","DOIUrl":"https://doi.org/10.1109/CGIV.2007.15","url":null,"abstract":"Noise reduction is one of the most important processes to enhance the quality of reconstructed image. In this paper, we present an adaptive block-based singular value decomposition method for noise reduction. Instead of applying block-based singular value decomposition (BSVD) directly to noisy images, we propose to apply BSVD on the noisy edge image version obtained from the difference between the original noisy image and its blur image version. From the experimental results, we demonstrate that our proposed approach compared with traditionally methods can remove noise, preserve edges as well as effectively smooth in the homogenous region. Therefore, our method leads to a practical method to be used for noise reduction.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115861847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
An Improved Approach on Visualization of Large-Scale Terrain Surface 一种改进的大尺度地形表面可视化方法
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.17
Huaiqing He, Chong Wang, Haohan Liu
{"title":"An Improved Approach on Visualization of Large-Scale Terrain Surface","authors":"Huaiqing He, Chong Wang, Haohan Liu","doi":"10.1109/CGIV.2007.17","DOIUrl":"https://doi.org/10.1109/CGIV.2007.17","url":null,"abstract":"We propose an improved approach on visualization of large-scale terrain surface based on ROAM algorithm, within this approach, we study the issue in two aspects: one is view-dependent LOD(level of detail) control, the other is out-of core data paging. An efficient data structure is introduced into the aspect of LOD control, on which coding method and none T- conjunction simplification algorithm is proposed. Meanwhile, the corresponding data conjunction method between different terrain blocks is given in the aspect of out-of core data paging. The purpose of employing such a data structure is to improve the efficient use of internal memory. The experiment results show that our approach achieves real-time LOD rendering for sufficient large-scale terrain and saves much internal memory compared with traditional R OAM algorithm.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"112 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128822022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Forging-dedicated CAD: how getting forging preform by using trade knowledge and feature reorganization. 锻件专用CAD:如何利用行业知识和特征重组获得锻件坯件。
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.43
E. Brosse, Y. Gardan, E. Perrin
{"title":"Forging-dedicated CAD: how getting forging preform by using trade knowledge and feature reorganization.","authors":"E. Brosse, Y. Gardan, E. Perrin","doi":"10.1109/CGIV.2007.43","DOIUrl":"https://doi.org/10.1109/CGIV.2007.43","url":null,"abstract":"In this paper, we present a new knowledge-based application dedicated to hot forging. Hot forging is a multiple stages plastic deformation of metal starting from an initial part - named billet. The main difficulty of this process is to get each intermediate metal part - named preform - that is actually defined by blacksmiths thanks to forging rules and know-how. Our application supplies automatically the entire process: it reduces the 3D desired forged part into some appropriate slices thanks to morphological and geometrical criteria. For each slice, it extracts trade features and deforms the slice according to forging rules. Finally, it creates the preform by assembling the deformed slices. The application may iterate on this preform if necessary. In this study, we focus mainly on slices determination, trade features extraction and part reconstruction.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125816320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Homogeneity Based Background Subtraction for Robust Hand Pose Recognition : Focusing On the Digital Game Interface 基于同质性的背景减法鲁棒手部姿势识别:以数字游戏界面为中心
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.47
Youngjoon Chai, DongHeon Jang, Taeyong Kim
{"title":"Homogeneity Based Background Subtraction for Robust Hand Pose Recognition : Focusing On the Digital Game Interface","authors":"Youngjoon Chai, DongHeon Jang, Taeyong Kim","doi":"10.1109/CGIV.2007.47","DOIUrl":"https://doi.org/10.1109/CGIV.2007.47","url":null,"abstract":"This paper proposes a new game-control interface using hand poses captured from a digital camera. Extracting skin color from the background-subtracted image is generally used for segmenting hand region. But it suffers from change in illumination, shadows and skin- colored objects so that unwanted subsets reduce accuracy in hand pose recognition. To deal with these problems, first, subtracting skin colors from the background image must be done and second, it mustn 't get affected by changes in background. The paper describes an approach to using variance of homogeneity for skin color extraction. Homogeneity which represents contrast in a window is robust against change in illumination and can be used to effectively extract skin color rather than color or brightness based subtraction from background. The recognition of hand poses proceeds by computing fourier descriptor of extracted pixels. This approach to recognition can robustly identify hand poses comparing to the others. Experiments on real-time game demonstrate the robustness of the proposed method.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115558486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A Non-parametric Guide for Radiance Sampling in Global Illumination 全局照明中亮度采样的非参数指南
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-14 DOI: 10.1109/CGIV.2007.9
Pankaj Khanna, M. Slater, J. Mortensen, Insu Yu
{"title":"A Non-parametric Guide for Radiance Sampling in Global Illumination","authors":"Pankaj Khanna, M. Slater, J. Mortensen, Insu Yu","doi":"10.1109/CGIV.2007.9","DOIUrl":"https://doi.org/10.1109/CGIV.2007.9","url":null,"abstract":"Global illumination as described by the radiance and potential equations is essentially a sampling problem. This sampling has two elements: 'where' to sample and 'how' to sample. In this paper we propose an alternative method to non-parametric ally simplify the problem of 'where' in the general case. We present a solid angle based uniform sampling scheme with an efficient conservative cull of solid angles not affecting the transfer of radiance between two surfaces. This construction also provides a geometric area bounds within which a surface can receive energy from another along directions contained in the solid angle. The technique can be used to illuminate a scene from a general emitter, including incident light fields. The method has several applications and advantages, with results showing good sampling efficiency and speed.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116877381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Interpolating Movements Using CAGD Tools 使用CAGD工具插值运动
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2007-08-01 DOI: 10.1109/CGIV.2007.54
L. Traversoni
{"title":"Interpolating Movements Using CAGD Tools","authors":"L. Traversoni","doi":"10.1109/CGIV.2007.54","DOIUrl":"https://doi.org/10.1109/CGIV.2007.54","url":null,"abstract":"The idea is to perform interpolations with quaternions or quaternionic functions each one of whom represents a movement. We present several antecedents of different methods to perform interpolations with quaternions and other antecedents of the its use considering the fact that they represent movements for example to define surfaces in different ways. The paper is however focused on the quaternionic version of Sibson interpolant on the surface of the sphere where the scattered data are moving vortices of some fluid.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129826558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Human Face Recognition System Using Neural Classifiers 基于神经分类器的人脸识别系统
Computer Graphics, Imaging and Visualisation (CGIV 2007) Pub Date : 2006-07-01 DOI: 10.1109/CGIV.2007.6
Xiaoyin Xu, M. Ahmadi
{"title":"A Human Face Recognition System Using Neural Classifiers","authors":"Xiaoyin Xu, M. Ahmadi","doi":"10.1109/CGIV.2007.6","DOIUrl":"https://doi.org/10.1109/CGIV.2007.6","url":null,"abstract":"Traditional subspace methods for face recognition, from the original eigenfaces technique to the recently introduced Laplacian faces method, measure the similarity between images after projecting them onto a face subspace. In this paper, we present a robust face recognition system that uses a neural classifier and Laplacian faces method. Computer simulation shows that the proposed algorithm has better noise immunity and yields higher recognition rate compared with several conventional face recognition algorithms.","PeriodicalId":433577,"journal":{"name":"Computer Graphics, Imaging and Visualisation (CGIV 2007)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121570413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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