科学家研发实用性3d图像技术-凯发k8官网

科学家研发实用性3d图像技术
文章来源:未知 文章作者:enread 发布时间:2013-11-20 06:26 字体: [ ] 
(单词翻译:双击或拖选)
ut dallas computer scientists have developed a technique to create 3-d images that finds practical applications of a theory created by a famous 1. this technique uses anisotropic(各向异性的) triangles -- triangles with sides that vary in length depending on their direction -- to create 3-d "2" computer 3 of more accurate approximations of the shape of the original object, and in a shorter amount of time than current techniques. these types of images are used in movies, video games and computer modeling of various 4, such as the flow of water or air across the earth, the 5 and wrinkles of clothes on the human body, or in mechanical and other types of engineering designs. researchers hope this technique will also lead to greater accuracy in models of human organs to more effectively treat human diseases, such as cancer.
 
"anisotropic mesh can provide better simulation results for certain types of problems, for example, in fluid dynamics," said dr. xiaohu guo, associate professor of computer science in the erik jonsson school of engineering and computer science whose team created the technique.
 
the technique finds a practical application of the nash 6 theorem, which was named after mathematician john forbes nash jr., subject of the hollywood movie a beautiful mind.
 
"the 7 mathematics we used to solve this problem is rigorous and beautiful," guo said. "finding a way to use the theory in a practical application will have great impact in the field."
 
the computer graphics field represents shapes in the virtual world through triangle mesh. traditionally, it is believed that isotropic triangles -- where each side of the triangle has the same length regardless of direction -- are the best representation of shapes. however, the 8 of these uniform triangles can create edges or bumps that are not on the original objects. because triangle sides can differ in anisotrophic images, creating images with this technique would allow the user 9 to more 10 represent object edges or folds.
 
guo and his team found that replacing isotropic(各向同性的) triangles with anisotropic triangles in the particle-based method of creating images resulted in smoother representations of objects. depending on the curvature of the objects, the technique can generate the image up to 125 times faster than common approaches. for example, 155 seconds to create a circular image with guo's approach, 11 more than 19,500 seconds for a common approach to generate an image of similar quality.
 
objects using anisotropic triangles would be of a more accurate quality, and most noticeable to the human eye when it came to wrinkles and movement of clothes on human representatives.
 
the next step of this research would be to move from representing the surface of 3-d objects to representing 3-d volume.
 
"if we are going to create accurate representations of human organs, we need to account for the movement of cells below the organ's surface," guo said.
 
the research was presented at the association for 12 13 siggraph conference earlier this year.
 
zichun zhong, research assistant in computer science at ut dallas was also involved in this research. researchers from the university of hong kong, inria nancy grand est in france, nvidia corporation in california and ut southwestern medical center also participated.


点击收听单词发音收听单词发音  

1 aopz2p     
n.数学家
参考例句:
  • the man with his back to the camera is a mathematician.背对着照相机的人是位数学家。
  • the mathematician analyzed his figures again.这位数学家再次分析研究了他的这些数字。
2 cc1xj     
n.网孔,网丝,陷阱;vt.以网捕捉,啮合,匹配;vi.适合; [计算机]网络
参考例句:
  • their characters just don't mesh.他们的性格就是合不来。
  • this is the net having half inch mesh.这是有半英寸网眼的网。
3 crxzul     
n.制图法,制图学;图形显示
参考例句:
  • you've leveraged your graphics experience into the video area.你们把图形设计业务的经验运用到录像业务中去。
  • improved graphics took computer games into a new era.经改进的制图技术将电脑游戏带进了一个新时代。
4 8n9xp     
n.现象
参考例句:
  • ade couldn't relate the phenomena with any theory he knew.艾德无法用他所知道的任何理论来解释这种现象。
  • the object of these experiments was to find the connection,if any,between the two phenomena.这些实验的目的就是探索这两种现象之间的联系,如果存在着任何联系的话。
5 59ryp     
n.形状损坏;变形;畸形
参考例句:
  • the deformation frequencies are not sufficiently distinctive.其变形频率不是十分明显的。
  • the calculated deformation is almost equal to the real situation by measurement.经检测,计算变形量与实际情况基本一致。
6 91dcd46b7c7d960c321ddb6c8b0ce5d1     
把…嵌入,埋入( embed的现在分词 ); 植入; 埋置; 包埋
参考例句:
  • data embedding in scrambled digital video complete source code, has been tested. 数据嵌入在炒数字视频完整的源代码,已经过测试。
  • embedding large portions of c code in string literals is very awkward. 将大部分c 代码嵌入到字符串中是非常笨拙的。
7 5fyz8c     
adj.在下面的,含蓄的,潜在的
参考例句:
  • the underlying theme of the novel is very serious.小说隐含的主题是十分严肃的。
  • this word has its underlying meaning.这个单词有它潜在的含义。
8 ckoye     
adj.总计的,集合的;n.总数;v.合计;集合
参考例句:
  • the football team had a low goal aggregate last season.这支足球队上个赛季的进球总数很少。
  • the money collected will aggregate a thousand dollars.进帐总额将达一千美元。
9 vjpxb     
n.柔韧性,弹性,(光的)折射性,灵活性
参考例句:
  • her great strength lies in her flexibility.她的优势在于她灵活变通。
  • the flexibility of a man's muscles will lessen as he becomes old.人老了肌肉的柔韧性将降低。
10 ojhyf     
adv.准确地,精确地
参考例句:
  • it is hard to hit the ball accurately.准确地击中球很难。
  • now scientists can forecast the weather accurately.现在科学家们能准确地预报天气。
11 wi7wu     
prep.以…为对手,对;与…相比之下
参考例句:
  • the big match tonight is england versus spain.今晚的大赛是英格兰对西班牙。
  • the most exciting game was harvard versus yale.最富紧张刺激的球赛是哈佛队对耶鲁队。
12 tvbzxs     
n.计算
参考例句:
  • to work in computing 从事信息处理
  • back in the dark ages of computing, in about 1980, they started a software company. 早在计算机尚未普及的时代(约1980年),他们就创办了软件公司。
13 cadxb     
n.(总称)机械,机器;机构
参考例句:
  • has the machinery been put up ready for the broadcast?广播器材安装完毕了吗?
  • machinery ought to be well maintained all the time.机器应该随时注意维护。
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