机构

• 力学研究所 [1]
• 长春光学精密机械与物... [1]

采集方式

• OAI收割 [2]

内容类型

• 会议论文 [2]

发表日期

• 2013 [1]
• 2012 [1]

学科主题

筛选

浏览/检索结果: 共2条，第1-2条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Implementation and verification of high-order accurate discontinuous Galerkin method on 2-D unstructured grids 会议论文  OAI收割 International Symposium on Mechatronics and Applied Mechanics, ISMAM 2013, Nanjing, China, MAY 15-16, 2013 作者:  Zhao WG(赵文赓);  Zheng HW(郑洪伟) 收藏  |  浏览/下载：30/0  |  提交时间：2014/02/24 Data Limiting  Discontinuous Galerkin  High-Order Accuracy  Unstructured Grids   Comparison and simulation of subpixel imaging modes for linear CCD (EI CONFERENCE) 会议论文  OAI收割 2012 3rd International Conference on Information Technology for Manufacturing Systems, ITMS 2012, September 8, 2012 - September 9, 2012, Qingdao, China 作者:  Li Y.;  He B.;  Li Y.;  Li Y.;  Li Y. 收藏  |  浏览/下载：37/0  |  提交时间：2013/03/25 Subpixel technique of linear CCD is effective to enhance the spatial resolution without increasing the focal length of optics and reducing the pixel size. To compare image quality of two main subpixel imaging modes  quincunx sampling and four-point sampling  a method to quantitatively evaluate image quality of subpixel based on MTF was proposed. The MTF of quincunx and four-point sampling modes were derived. Analytical results shows that theoretical limiting resolution of quincunx sampling and four-point sampling is improved to 1.4 and 1.86 times respectively  and MTF values at Nyquist frequency of two modes are increased by 0.1106 and 0.1679  respectively. MTFA in (0  0.5) of two subpixel imaging modes were calculated and results illustrates that four-point sampling offers much more improvement with image quality than quincunx sampling  at the cost of double amount of data. A model for simulating subpixel imaging using Matlab was established  and simulation results of spoke target verify the theoretical analysis. (2012) Trans Tech Publications  Switzerland.