中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
机构
采集方式
内容类型
发表日期
学科主题
筛选

浏览/检索结果: 共4条,第1-4条 帮助

条数/页: 排序方式:
An Efficient Approach of 2D to 3D Video Conversion Based on Piece-wise Structure from Motion 期刊论文  OAI收割
The Visual Computer, 2015, 卷号: 31, 期号: 1, 页码: 55-68
作者:  
Yihong Wu (吴毅红)
  |  收藏  |  浏览/下载:11/0  |  提交时间:2018/01/04
Mobile Landmark Search with 3D Models 期刊论文  OAI收割
IEEE TRANSACTIONS ON MULTIMEDIA, 2014, 卷号: 16, 期号: 3, 页码: 623-636
作者:  
Min, Weiqing;  Xu, Changsheng;  Xu, Min;  Xiao, Xian;  Bao, Bing-Kun
收藏  |  浏览/下载:34/0  |  提交时间:2015/08/12
Centroid localization algorithm based on bicubic interpolation gray square weighted (EI CONFERENCE) 会议论文  OAI收割
2012 3rd International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2012, December 22, 2012 - December 23, 2012, Beihai, China
作者:  
Zhou J.
收藏  |  浏览/下载:152/0  |  提交时间:2013/03/25
The 3D coordinates of measured point is embodied in 2D image coordinate of the optical characteristic point via the visual measurement system. Based on the gray square weighted centroid localization algorithm  the paper presents bicubic interpolation gray square weighted centroid localization algorithm  increases the number of effective pixels around the optical characteristic point imaging center  and reduces noise error via the gray square weighted  improves the imaging center location accuracy of optical characteristic point  realizes the accurate location of the optical characteristic points. Results indicate application of the proposed algorithm to location  the standard tolerance along the direction of x is 0.0022 Pixel  the standard tolerance along the direction of y is 0.0023 Pixel  compared with the others  the standard tolerance is minimum and discrete to a lesser degree distancing ideal image point  that is  the proposed algorithm has higher location accuracy. The maximum tolerance along the direction of x is 0.008 Pixel  the one along the direction of y is 0.007 Pixel  compared with the other two algorithms  the maximum tolerance is minimum.Results indicate that the stability of the proposed algorithm is better. (2013) Trans Tech Publications  Switzerland.  
Investigation of growth mode in ZnO thin films prepared at different temperature by plasma-molecular beam epitaxy (EI CONFERENCE) 会议论文  OAI收割
13th International Conference on Molecular Beam Epitaxy, August 22, 2004 - August 27, 2004, 13th International Conference on Molecular Beam Epitaxy, August 22, 2004 - August 27, 2004
Liang H. W.; Lu Y. M.; Shen D. Z.; Yan J. F.; Li B. H.; Zhang J. Y.; Liu Y. C.; Fan X. W.
收藏  |  浏览/下载:35/0  |  提交时间:2013/03/25
High-quality ZnO thin films on c-plane sapphire (Al2O 3) substrates were prepared by plasma-molecular beam epitaxy (P-MBE). The influence of growth temperature on growth mode of ZnO was investigated. Real-time monitored by reflection high-energy electron diffraction (RHEED) images show that  below 500 C  ZnO thin film was grown by three-dimension (3D) growth mode. While the two-dimension (2D) growth mode was obtained above growth temperature of 650 C. Atomic force microscopy (AFM) images present that the surface morphology of ZnO thin film with 2D growth is improved and X-ray rocking curves (XRC) indicate that the full width at half maximum (FWHM) of the ZnO (0 0 2) peak becomes narrow. From the photoluminescence (PL) spectra  ultraviolet (UV) emission peak exhibits obvious blue-shift for the samples grown at lower temperature  which is attributed to the effect of the quantum confinement arisen from small crystal grain sizes. The minimum carrier concentration of N=7.661016 cm-3 was obtained in the ZnO thin films with the 2D grown  which is closed to that of bulk ZnO. 2005 Elsevier B.V. All rights reserved.