机构

• 地理科学与资源研究所 [3]
• 长春光学精密机械与物... [1]

采集方式

• OAI收割 [4]

内容类型

• 会议论文 [2]
• SCI/SSCI论文 [1]
• 期刊论文 [1]

发表日期

• 2009 [1]
• 2006 [3]

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 Building Extraction from High-resolution Remotely Sensed Imagery based on Morphology Characteristics 会议论文  OAI收割 Proceedings of SPIE-The International Society for Optical Engineering Xu X. L.; Feng X. F.; Wang C. H. 收藏  |  浏览/下载：19/0  |  提交时间：2012/06/30 high-resolution imagery  image segment  building extraction  morphology  characteristic  satellite imagery  ikonos imagery  urban areas  reconstruction  classification  segmentation  algorithms   A new spaceborne compression approach for remote sensing imagery (EI CONFERENCE) 会议论文  OAI收割 ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China 作者:  Xu S. 收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25 After analyzing advantages and disadvantages of these typical encoding methods: SPIHT and VQ  a "DWT+MRLE" approach for spaceborne data compression was proposed in this paper. This approach includes two steps: Discrete Wavelet Transform (DWT) and Modified Run Length Encoding (MRLE). The former used CDF9/7 biorthogonal wavelet filters to powerfully get rid of correlation between pixels in imagery. The later put enlightening information into the lowest bit of some key-position transform coefficients. Consequently  CDF9/7 and MRLE together make hardware platform remain high real-time capability  and help reconstructed images keep good fidelity with PSNR being about 40dB  compared with the original ones. Comparison between experimentations on SPOT4's low-spatial-resolution (10m) imagery and Ikonos2's high-spatial-resolution (1m) imagery  shows this "DWT+MRLE" method having better performance for remote-sensed imagery  especially those of higher resolution. Although inferior to 8:1  Compression Ration (CR) here near 5:1 is greater than France SPOT5's 3:1 and American Ikonos2's 11:2.6 on-board data compression. More important  this method having less computational amount is good for spaceborne capability of real time. The consumed time of different image size is also presented in this paper  based on TI TMSC6416 DSP chip with 600MHz CPU cycle clock.   Measuring long-term ecological changes in densely populated landscapes using current and historical high resolution imagery SCI/SSCI论文  OAI收割 2006 Ellis E. C.; Wang H. Q.; Xiao H. S.; Peng K.; Liu X. P.; Li S. C.; Ouyang H.; Cheng X.; Yang L. Z. 收藏  |  浏览/下载：21/0  |  提交时间：2012/06/08 human dominated ecosystems  land-use change  feature-based mapping  landscape classification  long-term ecological change  ecological  history  urban landscapes  suburbs  villages  landscape ecology  land-use change  spatial-resolution  ikonos imagery  cover  classification  vegetation dynamics  accuracy assessment  aerial  photographs  urban reflectance  scale  methodology   Measuring long-term ecological changes in densely populated landscapes using current and historical high resolution imagery 期刊论文  OAI收割 Remote Sensing of Environment, 2006, 卷号: 100, 期号: 4, 页码: 457-473 作者:  Ellis E. C.;  Wang H. Q.;  Xiao H. S.;  Peng K.;  Liu X. P.   |  收藏  |  浏览/下载：30/0  |  提交时间：2012/06/08 Human Dominated Ecosystems  Land-use Change  Feature-based Mapping  Landscape Classification  Long-term Ecological Change  Ecological  History  Urban Landscapes  Suburbs  Villages  Landscape Ecology  Land-use Change  Spatial-resolution  Ikonos Imagery  Cover  Classification  Vegetation Dynamics  Accuracy Assessment  Aerial  Photographs  Urban Reflectance  Scale  Methodology