机构

• 自动化研究所 [2]
• 长春光学精密机械与物... [1]
• 国家天文台 [1]

采集方式

• OAI收割 [4]

内容类型

• 期刊论文 [3]
• 会议论文 [1]

发表日期

• 2019 [1]
• 2013 [1]
• 2012 [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 A high-resolution self-consistent whole sky foreground model 期刊论文  OAI收割 SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY, 2019, 卷号: 62, 期号: 8, 页码: 13 作者:  Huang, QiZhi;  Wu, FengQuan;  Chen, XueLei   |  收藏  |  浏览/下载：15/0  |  提交时间：2020/03/10 neutral hydrogen  21 cm line  foreground model  whole sky map  simulation   Object Detection via Structural Feature Selection and Shape Model 期刊论文  OAI收割 IEEE TRANSACTIONS ON IMAGE PROCESSING, 2013, 卷号: 22, 期号: 12, 页码: 4984-4995 作者:  Zhang, Huigang;  Bai, Xiao;  Zhou, Jun;  Cheng, Jian;  Zhao, Huijie 收藏  |  浏览/下载：33/0  |  提交时间：2015/08/12 Object detection  foreground feature selection  part-based shape model   Foreground Object Detection Using Top-Down Information Based on EM Framework 期刊论文  OAI收割 IEEE TRANSACTIONS ON IMAGE PROCESSING, 2012, 卷号: 21, 期号: 9, 页码: 4204-4217 作者:  Liu, Zhou;  Huang, Kaiqi;  Tan, Tieniu 收藏  |  浏览/下载：34/0  |  提交时间：2015/08/12 Background model  expectation maximization (EM) framework  foreground detection  Markov random fields (MRFs)   An improved two-dimensional entropy method for star trail tracing in deep sky (EI CONFERENCE) 会议论文  OAI收割 ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China 作者:  Wang Y.-J.;  Yao Z.-J. 收藏  |  浏览/下载：32/0  |  提交时间：2013/03/25 The trace of star trail is an important component of deep sky detection. The stars are low contrast targets  and their self-rotation will make their brightness change in cycle. Above all  the trail trace is vulnerable to the block and disturbance of other stars. Traditional one-dimensional maximum entropy thresholding algorithm is vulnerable to the noise  and the calculation of two-dimensional entropy methods is too large and takes too much time. This paper proposes an improved two-dimensional entropy threshold algorithm. We use recursion iteration method to eliminate the redundancy calculation  and reduce the size of two-dimensional histogram based on the deep sky stars characteristic  such as low contrast  fuzziness and the centralized histogram. We also combine our algorithm with the space trail trace model to forecast the star trace. Experiments results show  when the star are blocked or they turn dark  the method still can well extrapolate the star trace. Our method improves the capability of trailing the ebb and small star  and increases the precision of tracing. It is also robust to the noise  so there is a good application foreground for the method.