中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共7条，第1-7条

帮助

条数/页：排序方式：
	Efficient triangulation of Poisson-disk sampled point sets 期刊论文 OAI收割 VISUAL COMPUTER, 2014, 卷号: 30, 期号: 6-8, 页码: 773-785 作者: Guo, Jianwei; Yan, Dong-Ming; Bao, Guanbo; Dong, Weiming; Zhang, Xiaopeng 收藏 \| 浏览/下载：29/0 \| 提交时间：2015/08/12 Triangulation Poisson-disk sampling Geometric algorithms
	A line mapping based automatic registration algorithm of infrared and visible images 会议论文 OAI收割 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications, Beijing, June 25-27, 2013 作者: Ai R(艾锐); Shi ZL(史泽林); Xu DJ(徐德江); Zhang CS(张程硕) 收藏 \| 浏览/下载：36/0 \| 提交时间：2013/12/26 There exist complex gray mapping relationships among infrared and visible images because of the different imaging mechanisms. The difficulty of infrared and visible image registration is to find a reasonable similarity definition. In this paper, we develop a novel image similarity called implicit linesegment similarity(ILS) and a registration algorithm of infrared and visible images based on ILS. Essentially, the algorithm achieves image registration by aligning the corresponding line segment features in two images. First, we extract line segment features and record their coordinate positions in one of the images, and map these line segments into the second image based on the geometric transformation model. Then we iteratively maximize the degree of similarity between the line segment features and correspondence regions in the second image to obtain the model parameters. The advantage of doing this is no need directly measuring the gray similarity between the two images. We adopt a multi-resolution analysis method to calculate the model parameters from coarse to fine on Gaussian scale space. The geometric transformation parameters are finally obtained by the improved Powell algorithm. Comparative experiments demonstrate that the proposed algorithm can effectively achieve the automatic registration for infrared and visible images, and under considerable accuracy it makes a more significant improvement on computational efficiency and anti-noise ability than previously proposed algorithms.
	Design of aspherical surfaces for panoramic imagers using multipopulations genetic algorithm (EI CONFERENCE) 会议论文 OAI收割 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China 作者: Jin C.-S.; Wang L.-P.; Liang Z.-Z. 收藏 \| 浏览/下载：27/0 \| 提交时间：2013/03/25 A design method of aspherical surface for panoramic imaging system with two mirrors using multi-populations genetic algorithms is proposed. Astigmatism induced by mirrors may significantly compromise image resolution. To solve this problem we induced algebraic expression of astigmatism in panoramic imager based on generalized Coddington equation and theory of geometric optics. Then we propose an optimization process for mirror profile design to eliminate astigmatism and provide purposely-designed projection formula with aid of MPGA. A series of polynomial expressions of aspherical surfaces are obtained and procedures of the design are presented. In order to facilitate ray tracing and aberration calculation even asphere surface model is obtained by using of hybrid schemes combining MPGA and damped least squares. Finally a prototype of the catadioptric panoramic imager has been developed and panoramic ring image is obtained. 2009 SPIE.
	支持向量机分类及核聚类中的几何算法研究学位论文 OAI收割工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2005 作者: 常亮收藏 \| 浏览/下载：70/0 \| 提交时间：2015/09/02 几何算法支持向量机核聚类凸包最近点问题最小包含球 geometric algorithms Support Vector Machine Kernel Clustering Nearest Point Problem Minimum Enclosing Ball
	High-speed computation and efficient storage in 3-D gravity and magnetic inversion based on genetic algorithms 期刊论文 OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2003, 卷号: 46, 期号: 2, 页码: 252-258 作者: Yao, CL; Hao, T; Guan, ZN; Zhang, YW \| 收藏 \| 浏览/下载：19/0 \| 提交时间：2018/09/26 3-D inversion of gravity and magnetic anomalies genetic algorithms regular juxtaposed cuboids geometric trellis equivalent storage
	High-speed computation and efficient storage in 3-D gravity and magnetic inversion based on genetic algorithms 期刊论文 OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2003, 卷号: 46, 期号: 2, 页码: 252-258 作者: Yao, CL; Hao, T; Guan, ZN; Zhang, YW \| 收藏 \| 浏览/下载：12/0 \| 提交时间：2018/09/26 3-D inversion of gravity and magnetic anomalies genetic algorithms regular juxtaposed cuboids geometric trellis equivalent storage
	Hierarchical multiresolution reconstruction of shell surfaces 期刊论文 OAI收割 COMPUTER AIDED GEOMETRIC DESIGN, 2002, 卷号: 19, 期号: 2, 页码: 89-112 作者: Bajaj, CL; Xu, GL; Holt, RJ; Netravali, AN \| 收藏 \| 浏览/下载：19/0 \| 提交时间：2018/07/30 geometric modeling level of detail algorithms mesh generation