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On visual quality of optimal 3D sampling and reconstruction 最佳三维采样与重建的视觉质量研究
International Genetic Improvement Workshop Pub Date : 2007-05-28 DOI: 10.1145/1268517.1268560
T. Meng, Benjamin Smith, A. Entezari, A. Kirkpatrick, D. Weiskopf, Leila Kalantari, Torsten Möller
{"title":"On visual quality of optimal 3D sampling and reconstruction","authors":"T. Meng, Benjamin Smith, A. Entezari, A. Kirkpatrick, D. Weiskopf, Leila Kalantari, Torsten Möller","doi":"10.1145/1268517.1268560","DOIUrl":"https://doi.org/10.1145/1268517.1268560","url":null,"abstract":"This paper presents a user study of the visual quality of an imaging pipeline employing the optimal body-centered cubic (BCC) sampling lattice. We provide perceptual evidence supporting the theoretical expectation that sampling and reconstruction on the BCC lattice offer superior imaging quality over the traditionally popular Cartesian cubic (CC) sampling lattice. We asked 12 participants to choose the better of two images: one image rendered from data sampled on the CC lattice and one image that is rendered from data sampled on the BCC lattice. We used both synthetic and CT volumetric data, and confirm that the theoretical advantages of BCC sampling carry over to the perceived quality of rendered images. Using 25% to 35% fewer samples, BCC sampled data result in images that exhibit comparable visual quality to their CC counterparts.","PeriodicalId":197912,"journal":{"name":"International Genetic Improvement Workshop","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126815782","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: 25
Real-time backward disparity-based rendering for dynamic scenes using programmable graphics hardware 使用可编程图形硬件的动态场景的实时向后差分渲染
International Genetic Improvement Workshop Pub Date : 2007-05-28 DOI: 10.1145/1268517.1268557
Minglun Gong, Jason M. Selzer, C. Lei, Herbert Yang
{"title":"Real-time backward disparity-based rendering for dynamic scenes using programmable graphics hardware","authors":"Minglun Gong, Jason M. Selzer, C. Lei, Herbert Yang","doi":"10.1145/1268517.1268557","DOIUrl":"https://doi.org/10.1145/1268517.1268557","url":null,"abstract":"This paper presents a backward disparity-based rendering algorithm, which runs at real-time speed on programmable graphics hardware. The algorithm requires only a handful of image samples of the scene and estimated noisy disparity maps, whereas most existing techniques need either dense samples or accurate depth information. To color a given pixel in the novel view, a backward searching process is conducted to find the corresponding pixels from the closest four reference images. The use of backward searching process makes the algorithm more robust to errors in estimated disparity maps than existing forward warping-based approaches. In addition, since the computations for different pixels are independent, they can be performed in parallel on the Graphics Processing Units of modern graphics hardware. Experiment results demonstrate that our algorithm can synthesize accurate novel views for dynamic real scenes at a high frame rate.","PeriodicalId":197912,"journal":{"name":"International Genetic Improvement Workshop","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117036369","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
Constrained planar remeshing for architecture 建筑的约束平面网格划分
International Genetic Improvement Workshop Pub Date : 2007-05-28 DOI: 10.1145/1268517.1268522
B. Cutler, E. Whiting
{"title":"Constrained planar remeshing for architecture","authors":"B. Cutler, E. Whiting","doi":"10.1145/1268517.1268522","DOIUrl":"https://doi.org/10.1145/1268517.1268522","url":null,"abstract":"Material limitations and fabrication costs generally run at odds with the creativity of architectural design, producing a wealth of challenging computational geometry problems. We have developed an algorithm for solving an important class of fabrication constraints: those associated with planar construction materials such as glass or plywood.\u0000 Starting with a complex curved input shape, defined as a NURBS or subdivision surface, we use an iterative clustering method to remesh the surface into planar panels following a cost function that is adjusted by the designer. We solved several challenging connectivity issues to ensure that the topology of the resulting mesh matches that of the input surface.\u0000 The algorithm described in this paper has been implemented and developed in conjunction with an architectural design seminar. How the participants incorporated this tool into their design process was considered. Their important feedback led to key algorithmic and implementation insights as well as many exciting ideas for future exploration. This prototype tool has potential to impact not only architectural design, but also the engineering for general fabrication problems.","PeriodicalId":197912,"journal":{"name":"International Genetic Improvement Workshop","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123892970","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: 48
The effects of interaction technique on coordination in tabletop groupware 交互技术对桌面群件协同的影响
International Genetic Improvement Workshop Pub Date : 2007-05-28 DOI: 10.1145/1268517.1268550
Miguel A. Nacenta, David Pinelle, Dane Stuckel, C. Gutwin
{"title":"The effects of interaction technique on coordination in tabletop groupware","authors":"Miguel A. Nacenta, David Pinelle, Dane Stuckel, C. Gutwin","doi":"10.1145/1268517.1268550","DOIUrl":"https://doi.org/10.1145/1268517.1268550","url":null,"abstract":"The interaction techniques that are used in tabletop groupware systems (such as pick-and-drop or pantograph) can affect the way that people collaborate. However, little is known about these effects, making it difficult for designers to choose appropriate techniques when building tabletop groupware. We carried out an exploratory study to determine how several different types of interaction techniques (pantograph, telepointers, radar views, drag-and-drop, and laser beam) affected coordination and awareness in two tabletop tasks (a game and a storyboarding activity). We found that the choice of interaction technique significantly affected coordination measures, performance measures, and preference - but that the effects were different for the two different tasks. Our study shows that the choice of tabletop interaction technique does indeed matter, and provides insight into how tabletop systems can better support group work.","PeriodicalId":197912,"journal":{"name":"International Genetic Improvement Workshop","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114357137","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: 110
Spectral graph-theoretic approach to 3D mesh watermarking 基于谱图理论的三维网格水印方法
International Genetic Improvement Workshop Pub Date : 2007-05-28 DOI: 10.1145/1268517.1268570
E. Abdallah, A. Hamza, P. Bhattacharya
{"title":"Spectral graph-theoretic approach to 3D mesh watermarking","authors":"E. Abdallah, A. Hamza, P. Bhattacharya","doi":"10.1145/1268517.1268570","DOIUrl":"https://doi.org/10.1145/1268517.1268570","url":null,"abstract":"We propose a robust and imperceptible spectral watermarking method for high rate embedding of a watermark into 3D polygonal meshes. Our approach consists of four main steps: (1) the mesh is partitioned into smaller sub-meshes, and then the watermark embedding and extraction algorithms are applied to each sub-mesh, (2) the mesh Laplacian spectral compression is applied to the sub-meshes, (3) the watermark data is distributed over the spectral coefficients of the compressed sub-meshes, (4) the modified spectral coefficients with some other basis functions are used to obtain uncompressed watermarked 3D mesh. The main attractive features of this approach are simplicity, flexibility in data embedding capacity, and fast implementation. Extensive experimental results show the improved performance of the proposed method, and also its robustness against the most common attacks including the geometric transformations, adaptive random noise, mesh smoothing, mesh cropping, and combinations of these attacks.","PeriodicalId":197912,"journal":{"name":"International Genetic Improvement Workshop","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127028544","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: 33
Point-based stream surfaces and path surfaces 基于点的流表面和路径表面
International Genetic Improvement Workshop Pub Date : 2007-05-28 DOI: 10.1145/1268517.1268564
T. Schafhitzel, Eduardo Tejada, D. Weiskopf, T. Ertl
{"title":"Point-based stream surfaces and path surfaces","authors":"T. Schafhitzel, Eduardo Tejada, D. Weiskopf, T. Ertl","doi":"10.1145/1268517.1268564","DOIUrl":"https://doi.org/10.1145/1268517.1268564","url":null,"abstract":"We introduce a point-based algorithm for computing and rendering stream surfaces and path surfaces of a 3D flow. The points are generated by particle tracing, and an even distribution of those particles on the surfaces is achieved by selective particle removal and creation. Texture-based surface flow visualization is added to show inner flow structure on those surfaces. We demonstrate that our visualization method is designed for steady and unsteady flow alike: both the path surface component and the texture-based flow representation are capable of processing time-dependent data. Finally, we show that our algorithms lend themselves to an efficient GPU implementation that allows the user to interactively visualize and explore stream surfaces and path surfaces, even when seed curves are modified and even for time-dependent vector fields.","PeriodicalId":197912,"journal":{"name":"International Genetic Improvement Workshop","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127250262","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: 63
Improved skeleton extraction and surface generation for sketch-based modeling 改进了基于草图建模的骨架提取和表面生成
International Genetic Improvement Workshop Pub Date : 2007-05-28 DOI: 10.1145/1268517.1268524
F. Levet, Xavier Granier
{"title":"Improved skeleton extraction and surface generation for sketch-based modeling","authors":"F. Levet, Xavier Granier","doi":"10.1145/1268517.1268524","DOIUrl":"https://doi.org/10.1145/1268517.1268524","url":null,"abstract":"For the generation of freeform models, sketching interfaces have raised an increasing interest due to their intuitive approach. It is now possible to infer a 3D model directly from a sketched curved. Unfortunately, a limit of current systems is the poor quality of the skeleton automatically extracted from this silhouette, leading to low quality meshes for the resulting objects.\u0000 In this paper, we present new solutions that improve the surface generation for sketch-based modeling systems. First, we propose a new algorithm that extracts a smoother skeleton compared to previous approaches. Then, we present a new sampling scheme for the creation of good-quality 3D mesh. Finally, we propose to use a profile curve composed of disconnected components in order to create models which genus is greater than 0.","PeriodicalId":197912,"journal":{"name":"International Genetic Improvement Workshop","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121887033","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: 26
A digital family calendar in the home: lessons from field trials of LINC 家庭中的数字家庭日历:来自LINC现场试验的经验教训
International Genetic Improvement Workshop Pub Date : 2007-05-28 DOI: 10.1145/1268517.1268551
Carman Neustaedter, S. Greenberg, S. Greenberg
{"title":"A digital family calendar in the home: lessons from field trials of LINC","authors":"Carman Neustaedter, S. Greenberg, S. Greenberg","doi":"10.1145/1268517.1268551","DOIUrl":"https://doi.org/10.1145/1268517.1268551","url":null,"abstract":"Digital family calendars have the potential to help families coordinate, yet they must be designed to easily fit within existing routines or they will simply not be used. To understand the critical factors affecting digital family calendar design, we extended LINC, an inkable family calendar to include ubiquitous access, and then conducted a month-long field study with four families. Adoption and use of LINC during the study demonstrated that LINC successfully supported the families' existing calendaring routines without disrupting existing successful social practices. Families also valued the additional features enabled by LINC. For example, several primary schedulers felt that ubiquitous access positively increased involvement by additional family members in the calendaring routine. The field trials also revealed some unexpected findings, including the importance of mobility---both within and outside the home---for the Tablet PC running LINC.","PeriodicalId":197912,"journal":{"name":"International Genetic Improvement Workshop","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128270029","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: 35
Interactive refractions with total internal reflection 具有全内反射的交互折射
International Genetic Improvement Workshop Pub Date : 2007-05-28 DOI: 10.1145/1268517.1268548
Scott Davis, Chris Wyman
{"title":"Interactive refractions with total internal reflection","authors":"Scott Davis, Chris Wyman","doi":"10.1145/1268517.1268548","DOIUrl":"https://doi.org/10.1145/1268517.1268548","url":null,"abstract":"A requirement for rendering realistic images interactively is efficiently simulating material properties. Recent techniques have improved the quality for interactively rendering dielectric materials, but have mostly neglected a phenomenon associated with refraction, namely, total internal reflection. We present an algorithm to approximate total internal reflection on commodity graphics hardware using a ray-depth map intersection technique that is interactive and requires no precomputation. Our results compare favorably with ray traced images and improve upon approaches that avoid total internal reflection.","PeriodicalId":197912,"journal":{"name":"International Genetic Improvement Workshop","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116314369","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: 37
Isochords: visualizing structure in music 等弦:音乐中可视化的结构
International Genetic Improvement Workshop Pub Date : 2007-05-28 DOI: 10.1145/1268517.1268565
T. Bergstrom, Karrie Karahalios, J. Hart
{"title":"Isochords: visualizing structure in music","authors":"T. Bergstrom, Karrie Karahalios, J. Hart","doi":"10.1145/1268517.1268565","DOIUrl":"https://doi.org/10.1145/1268517.1268565","url":null,"abstract":"Isochords is a visualization of music that aids in the classification of musical structure. The Isochords visualization highlights the consonant intervals between notes and common chords in music. It conveys information about interval quality, chord quality, and the chord progression synchronously during playback of digital music. Isochords offers listeners a means to grasp the underlying structure of music that, without extensive training, would otherwise remain unobserved or unnoticed. In this paper we present the theory of the Isochords structure, the visualization, and comments from novice and experienced users.","PeriodicalId":197912,"journal":{"name":"International Genetic Improvement Workshop","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134096225","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: 80
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