Proceedings the Eighth Pacific Conference on Computer Graphics and Applications最新文献_第6页

Enhanced automatic creation of multi-purpose object hierarchies 增强了多用途对象层次结构的自动创建

Proceedings the Eighth Pacific Conference on Computer Graphics and Applications Pub Date : 2000-10-03 DOI: 10.1109/PCCGA.2000.883881

Jörg Haber, M. Stamminger, H. Seidel

{"title":"Enhanced automatic creation of multi-purpose object hierarchies","authors":"Jörg Haber, M. Stamminger, H. Seidel","doi":"10.1109/PCCGA.2000.883881","DOIUrl":"https://doi.org/10.1109/PCCGA.2000.883881","url":null,"abstract":"Using well-adapted object hierarchies can support the rendering of large scenes in different ways. For instance, the quality of the lighting simulation may be improved, or the computational cost for rendering may be reduced. However the meaning of \"well-adapted\" depends heavily on the criterion due to which the hierarchy has been constructed. Different applications typically have different demands like low average intersection cost for a ray tracer or grouping objects with similar material properties or surface orientation for hierarchical radiosity. The authors propose an algorithm for the automatic creation of object hierarchies. The hierarchies are constructed by sequentially inserting all scene objects into the hierarchy created so far. By basing the insertion decision on a cost function defined by the user, the method can be guided to create hierarchies tailored to the desired application. The results can be improved significantly by running a global optimization on the completed hierarchy. During this optimization step, we perform a re-grouping of the objects in the hierarchy. Any ill-formed groups that were created during the initial algorithm are subject to being eliminated by our global optimization.","PeriodicalId":342067,"journal":{"name":"Proceedings the Eighth Pacific Conference on Computer Graphics and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133839167","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

A particle model based on measured mechanical properties of woven cloth 基于实测织物力学性能的粒子模型

Proceedings the Eighth Pacific Conference on Computer Graphics and Applications Pub Date : 2000-10-03 DOI: 10.1109/PCCGA.2000.883972

X-Q. Dai, T. Furukawa, Shigeru Mitsui, Daiju Komai, M. Takatera, M. Hashimoto, Y. Shimizu

引用次数: 3

Triangular Bezier clipping 三角形贝塞尔裁剪

Proceedings the Eighth Pacific Conference on Computer Graphics and Applications Pub Date : 2000-10-03 DOI: 10.1109/PCCGA.2000.883971

S. Roth, Patrick Diezi, M. Gross

引用次数: 4

Cylindrical 3-D video display observable from all directions 圆柱形三维视频显示，可从各个方向观察

Proceedings the Eighth Pacific Conference on Computer Graphics and Applications Pub Date : 2000-05-03 DOI: 10.1109/PCCGA.2000.883953

T. Endo, Makoto Sato, Y. Kajiki, T. Honda

{"title":"Cylindrical 3-D video display observable from all directions","authors":"T. Endo, Makoto Sato, Y. Kajiki, T. Honda","doi":"10.1109/PCCGA.2000.883953","DOIUrl":"https://doi.org/10.1109/PCCGA.2000.883953","url":null,"abstract":"We propose a 3-D video display technique that allows multiple viewers to observe 3-D images from a 360-degree horizontal arc without wearing 3-D glasses. This technique uses a cylindrical parallax barrier and a one-dimensional light source array. We have developed an experimental display using this technique and have demonstrated observation of 3-D images from a 360-degree horizontal arc without the use of 3-D glasses. Since this technique is based on the parallax panoramagram, the parallax number and resolution are limited by the diffraction at the parallax barrier. To overcome these limits, we improved the technique by revolving the parallax barrier. We have incorporated this new technique in our new experimental display. The display is capable of displaying cylindrical 3-D video images within a diameter of 100 mm and a height of 128 mm. Images are described with a resolution of 1254 pixels circularly and 128 pixels vertically and are refreshed at 30 Hz. Each pixel has a viewing angle of 60 degrees that is divided into 70 views, so the angular parallax interval of each pixel is less than 1 degree. In such a case, observers may barely perceive discrete parallax. The pixels are arranged on a cylindrical surface to allow the produced 3-D images to be observed from all directions.","PeriodicalId":342067,"journal":{"name":"Proceedings the Eighth Pacific Conference on Computer Graphics and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130499914","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: 44