发布求助
文献互助 智能选刊 最新文献

Journal of Graphics Tools最新文献

筛选
英文 中文
Displaying Readable Text in a Head-Tracked, Stereoscopic Virtual Environment 在头部跟踪的立体虚拟环境中显示可读文本
Journal of Graphics Tools Pub Date : 2007-01-01 DOI: 10.1080/2151237X.2007.10129240
Eric Karasuda, Sara McMains
{"title":"Displaying Readable Text in a Head-Tracked, Stereoscopic Virtual Environment","authors":"Eric Karasuda, Sara McMains","doi":"10.1080/2151237X.2007.10129240","DOIUrl":"https://doi.org/10.1080/2151237X.2007.10129240","url":null,"abstract":"In a head-tracked, stereoscopic virtual environment, many straightforward text implementations suffer from poor readability or unnatural behavior. For example, scan-converted text often appears blurry or \"shimmery\" due to rapidly alternating text thickness because scan conversion depends on the user's location and the user rarely stays perfectly still. Likewise, bitmapped fonts cannot generally mimic objects with fixed size and location because they do not scale and thus do not appear larger as the viewer moves closer. This paper describes a simple method for displaying readable text that need not have a fixed location in the virtual environment, such as menu-system and annotation text. Our approach positions text relative to the user's view frustums (one frustum per eye), adjusting the 3D placement of each piece of text as the user moves, so the text occupies a constant location in each of the view frustums and projects to the same pixels regardless of the user's location. The result is crisp, clear text, consistently fused stereo vision, and reduced visual fatigue compared to many other types of text in virtual-reality environments.","PeriodicalId":318334,"journal":{"name":"Journal of Graphics Tools","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126785057","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
Fast Computation of Vertex Normals for Linearly Deforming Meshes 线性变形网格顶点法线的快速计算
Journal of Graphics Tools Pub Date : 2007-01-01 DOI: 10.1080/2151237X.2007.10129249
Jindrich Parus, I. Kolingerová, A. Hast
{"title":"Fast Computation of Vertex Normals for Linearly Deforming Meshes","authors":"Jindrich Parus, I. Kolingerová, A. Hast","doi":"10.1080/2151237X.2007.10129249","DOIUrl":"https://doi.org/10.1080/2151237X.2007.10129249","url":null,"abstract":"In this paper, we deal with shading of linearly deforming triangular meshes that deform in time so that each vertex travels independently along its linear trajectory. We will show how the vertex normal can be computed efficiently for an arbitrary triangular polygon mesh under linear deformation using the weighting scheme referred to by Jin et al. as \"mean weighted by areas of adjacent triangles.\" Our computation approach is also faster than simple normal recomputation. Moreover, it is more accurate than the usual linear interpolation. The proposed approach is general enough to be used to compute the vertex normal for any number of adjacent faces.","PeriodicalId":318334,"journal":{"name":"Journal of Graphics Tools","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121585724","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: 1
iSlerp: An Incremental Approach to Slerp iSlerp:一种渐进的睡眠方法
Journal of Graphics Tools Pub Date : 2007-01-01 DOI: 10.1080/2151237X.2007.10129245
Xin Li
{"title":"iSlerp: An Incremental Approach to Slerp","authors":"Xin Li","doi":"10.1080/2151237X.2007.10129245","DOIUrl":"https://doi.org/10.1080/2151237X.2007.10129245","url":null,"abstract":"In this paper, an incremental quaternion-interpolation algorithm is introduced. With the assumption of a constant interval between a pair of quaternions, the cost of the interpolation algorithm is significantly reduced. Expensive trigonometric calculations in Slerp are replaced with simple linear-combination arithmetic. The round-off errors and drifting behavior accumulated through incremental steps are also analyzed.","PeriodicalId":318334,"journal":{"name":"Journal of Graphics Tools","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121565945","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
Bidirectional Adaptive √3-Subdivision 双向自适应√3细分
Journal of Graphics Tools Pub Date : 2007-01-01 DOI: 10.1080/2151237X.2007.10129247
Gerd Sußner, M. Stamminger, G. Greiner
{"title":"Bidirectional Adaptive √3-Subdivision","authors":"Gerd Sußner, M. Stamminger, G. Greiner","doi":"10.1080/2151237X.2007.10129247","DOIUrl":"https://doi.org/10.1080/2151237X.2007.10129247","url":null,"abstract":"Starting with small, rough, and low-detailed base models, √3- subdivision is able to produce smooth and highly accurate models by adaptive subdivision. However, current smoothing methods are only unidirectional, i.e., a mesh can be smoothed locally, but it is not possible to adaptively coarsen the mesh again. As a consequence, for view-dependent display, a change of the viewing parameters requires a complete restart at the base level. In this paper, a framework for bidirectional adaptive subdivision is presented, which allows us to adapt the current triangulation in both directions locally, i.e., add detail where required and remove detail whenever possible. It operates on the current triangulation only, i.e., there is no need to restore any previous states. Our smoothing process allows us to keep a constant frame rate within every single step in the refinement loop. To avoid popping artifacts, inserted and removed vertices are \"geomorphed.\" Basic key-frame animation support is provided by moving positions of vertices of the base mesh. The framework is suitable for various applications, e.g., as part of a graphics engine for computer games or for character modeling. As a proof of concept, we implemented a view-dependent application, rendering a large number of arbitrary meshes at interactive frame rates with sufficient detail.","PeriodicalId":318334,"journal":{"name":"Journal of Graphics Tools","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131761537","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 Thresholding using the Integral Image 基于积分图像的自适应阈值分割
Journal of Graphics Tools Pub Date : 2007-01-01 DOI: 10.1080/2151237X.2007.10129236
D. Bradley, G. Roth
{"title":"Adaptive Thresholding using the Integral Image","authors":"D. Bradley, G. Roth","doi":"10.1080/2151237X.2007.10129236","DOIUrl":"https://doi.org/10.1080/2151237X.2007.10129236","url":null,"abstract":"Image thresholding is a common task in many computer vision and graphics applications. The goal of thresholding an image is to classify pixels as either \"dark\" or \"light.\" Adaptive thresholding is a form of thresholding that takes into account spatial variations in illumination. We present a technique for real-time adaptive thresholding using the integral image of the input. Our technique is an extension of a previous method. However, our solution is more robust to illumination changes in the image. Additionally, our method is simple and easy to implement. Our technique is suitable for processing live video streams at a real-time frame-rate, making it a valuable tool for interactive applications such as augmented reality. Source code is available online.","PeriodicalId":318334,"journal":{"name":"Journal of Graphics Tools","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133711333","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: 1063
Exact Evaluation of Catmull-Clark Subdivision Surfaces Near B-Spline Boundaries b样条边界附近Catmull-Clark细分曲面的精确评价
Journal of Graphics Tools Pub Date : 2007-01-01 DOI: 10.1080/2151237X.2007.10129243
Dylan Lacewell, Brent Burley
{"title":"Exact Evaluation of Catmull-Clark Subdivision Surfaces Near B-Spline Boundaries","authors":"Dylan Lacewell, Brent Burley","doi":"10.1080/2151237X.2007.10129243","DOIUrl":"https://doi.org/10.1080/2151237X.2007.10129243","url":null,"abstract":"We extend the eigenbasis method of Stam to evaluate Catmull-Clark subdivision surfaces near extraordinary vertices on B-spline boundaries. Source code is available online.","PeriodicalId":318334,"journal":{"name":"Journal of Graphics Tools","volume":"10 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134575439","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: 14
On Faster Sphere-Box Overlap Testing 关于更快球盒重叠测试
Journal of Graphics Tools Pub Date : 2007-01-01 DOI: 10.1080/2151237X.2007.10129232
T. Larsson, T. Akenine-Möller, Eric Lengyel
{"title":"On Faster Sphere-Box Overlap Testing","authors":"T. Larsson, T. Akenine-Möller, Eric Lengyel","doi":"10.1080/2151237X.2007.10129232","DOIUrl":"https://doi.org/10.1080/2151237X.2007.10129232","url":null,"abstract":"We present faster overlap tests between spheres and either axis-aligned or oriented boxes. By utilizing quick rejection tests, faster execution times are observed compared to previous techniques. In addition, we present alternative vectorized overlap tests, which are compared to the sequential algorithms. Source code is available online.","PeriodicalId":318334,"journal":{"name":"Journal of Graphics Tools","volume":"1039 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131551684","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
Textured Shadow Volumes 纹理阴影体
Journal of Graphics Tools Pub Date : 2007-01-01 DOI: 10.1080/2151237X.2007.10129251
J. Hasselgren, T. Akenine-Möller
{"title":"Textured Shadow Volumes","authors":"J. Hasselgren, T. Akenine-Möller","doi":"10.1080/2151237X.2007.10129251","DOIUrl":"https://doi.org/10.1080/2151237X.2007.10129251","url":null,"abstract":"We extend the shadow-volume algorithm so that every shadow-casting triangle can be associated with a transmittance texture, which dictates how much light can pass through the triangle at different locations. Our algorithm handles several layers of colored and semitransparent shadows. It allows efficient rendering of effects such as realistic shadows from leaves, fur, and colored glass. Source code is available online.","PeriodicalId":318334,"journal":{"name":"Journal of Graphics Tools","volume":"50 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116338822","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: 6
Fast Ray/Axis-Aligned Bounding Box Overlap Tests using Ray Slopes 使用射线斜率的快速射线/轴对齐边界框重叠测试
Journal of Graphics Tools Pub Date : 2007-01-01 DOI: 10.1080/2151237X.2007.10129248
M. Eisemann, M. Magnor, Thorsten Grosch, S. Müller
{"title":"Fast Ray/Axis-Aligned Bounding Box Overlap Tests using Ray Slopes","authors":"M. Eisemann, M. Magnor, Thorsten Grosch, S. Müller","doi":"10.1080/2151237X.2007.10129248","DOIUrl":"https://doi.org/10.1080/2151237X.2007.10129248","url":null,"abstract":"This paper proposes a new method for fast ray/axis-aligned bounding box overlap tests. This method tests the slope of a ray against an axis-aligned bounding box by projecting itself and the box onto the three planes orthogonal to the world-coordinate axes and performs the tests on them separately. The method is division-free, and successive calculations are independent of each other. No intersection distance is computed, but it can be added easily. Test results show the technique is up to 18% faster than any other method known to us and 14% faster on average for a wide variety of different test scenes and different processor architectures. Source code is available online.","PeriodicalId":318334,"journal":{"name":"Journal of Graphics Tools","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116882950","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: 15
Unified Distance Formulas for Halfspace Fog 半空间雾的统一距离公式
Journal of Graphics Tools Pub Date : 2007-01-01 DOI: 10.1080/2151237X.2007.10129239
Eric Lengyel
{"title":"Unified Distance Formulas for Halfspace Fog","authors":"Eric Lengyel","doi":"10.1080/2151237X.2007.10129239","DOIUrl":"https://doi.org/10.1080/2151237X.2007.10129239","url":null,"abstract":"In many real-time rendering applications, it is necessary to model a fog volume that is bounded by a single plane but is otherwise infinite in extent. This paper presents unified formulas that provide the correct distance traveled through a fog halfspace for all possible camera and surface point locations. Such formulas effectively remove the need to code for multiple cases separately, thereby achieving optimal fragment shading performance on modern rendering hardware.","PeriodicalId":318334,"journal":{"name":"Journal of Graphics Tools","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116933374","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信