机构

• 金属研究所 [2]
• 长春光学精密机械与物... [2]

采集方式

• OAI收割 [4]

内容类型

• 会议论文 [2]
• 期刊论文 [2]

发表日期

• 2010 [2]
• 2009 [1]
• 2006 [1]

学科主题

筛选

浏览/检索结果: 共4条，第1-4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 Image registration based on log-polar transform and SIFT features (EI CONFERENCE) 会议论文  OAI收割 2010 International Conference on Computational and Information Sciences, ICCIS2010, December 17, 2010 - December 19, 2010, Chengdu, Sichuan, China 作者:  Liu Y.;  Liu Y.;  Liu Y. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 This paper describes a novel image registration method that combines log-polar transform and SIFT to recover similarity transformations (rotation/ scale/ translation).We extracts SIFT feature points in the two images firstly. Then  we use threshold Euclidean distance to coarsely match the feature points. After that  the log-polar transform is applied to compute the rotation and scale parameters. And we can obtain the translation parameter by the location relationship of the feature points. 2010 IEEE.   Nonautonomous "rogons" in the inhomogeneous nonlinear Schrodinger equation with variable coefficients 期刊论文  OAI收割 Physics Letters A, 2010, 卷号: 374, 期号: 4, 页码: 672-679 Z. Y. Yan 收藏  |  浏览/下载：28/0  |  提交时间：2012/04/13 Inhomogeneous NLS equation with variable coefficients  Similarity  transformation  Rational-like solutions  Rogue waves  Rogons  rogue waves  freak-waves  similarity transformations  solitons  states   Analytical three-dimensional bright solitons and soliton pairs in Bose-Einstein condensates with time-space modulation 期刊论文  OAI收割 Physical Review A, 2009, 卷号: 80, 期号: 6 Z. Y. Yan; C. Hang 收藏  |  浏览/下载：16/0  |  提交时间：2012/04/13 similarity transformations  collisions  equations   Wavelet-fractal based compression of ophthalmic image (EI CONFERENCE) 会议论文  OAI收割 ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China Xiu-Ying Z.; Lin-Pei Z. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25 This study is designed to determine the degree and methods of digital image compression to produce ophthalmic images of sufficient quality for transmission and diagnosis. Fractal based compression techniques  which provide a large compression ratio for grayscale images have been reported in the literature. Fractal coding is based on the fractal theory of iterated transformations. But  it's searching and mapping algorithm cannot address the need of real-time. To improve the real-time performance of the algorithm  we use wavelet transforms to decompose images. The wavelet transform is a natural tool for analyzing fractal block coders since wavelet bases possess the same type of dyadic self-similarity that fractal coders seek to exploit. We propose a method of fractal coding the weighted wavelet subtree. Experimented results show that the improved hybrid image can improve the PSNR of the rebuild image at the same compression ratio.