机构

• 地理科学与资源研究所 [3]
• 长春光学精密机械与物... [1]
• 寒区旱区环境与工程研... [1]

采集方式

• OAI收割 [4]
• iSwitch采集 [1]

内容类型

• 期刊论文 [4]
• 会议论文 [1]

发表日期

• 2020 [2]
• 2017 [1]
• 2007 [1]
• 2006 [1]

学科主题

筛选

浏览/检索结果: 共5条，第1-5条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序作者升序作者降序 Theoretical and empirical comparative evaluations on measures of map association 期刊论文  OAI收割 JOURNAL OF GEOGRAPHICAL SYSTEMS, 2020, 页码: 30 作者:  Lin, Yue;  Wang, Jinfeng;  Xu, Chengdong   |  收藏  |  浏览/下载：23/0  |  提交时间：2021/03/23 Bivariate spatial association  Measurement scales  Map comparison  Spatial statistics   Theoretical and empirical comparative evaluations on measures of map association 期刊论文  OAI收割 JOURNAL OF GEOGRAPHICAL SYSTEMS, 2020, 页码: 30 作者:  Lin, Yue;  Wang, Jinfeng;  Xu, Chengdong   |  收藏  |  浏览/下载：17/0  |  提交时间：2021/03/23 Bivariate spatial association  Measurement scales  Map comparison  Spatial statistics   Annual dynamics of forest areas in South America during 2007-2010 at 50m spatial resolution 期刊论文  OAI收割 REMOTE SENSING OF ENVIRONMENT, 2017, 卷号: 201, 页码: 73-87 作者:  Qin, Yuanwei;  Xiao, Xiangming;  Dong, Jinwei;  Zhou, Yuting;  Wang, Jie   |  收藏  |  浏览/下载：40/0  |  提交时间：2019/09/25 Tropical forest  ALOS PALSAR  Forest map comparison  User community  Biodiversity conservation  Leaf area index  Forest definition   Study on the change of Keqikaer Glacier during the last 30 years, Mt. Tuomuer, Western China 期刊论文  iSwitch采集 ENVIRONMENTAL GEOLOGY, 2007, 卷号: 51, 期号: 7, 页码: 1165-1170 作者:  Xie Changwei;  Ding Yongjian;  Chen Caiping;  Han Tianding 收藏  |  浏览/下载：36/0  |  提交时间：2019/10/08 radio-echo sounding  map comparison  ice tongue  Keqikaer Glacier  China   Compression of remote sensing image based on Listless Zerotree Coding and DPCM (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 Chen S.-L.; Huang L.-Q. 收藏  |  浏览/下载：34/0  |  提交时间：2013/03/25 The data quantity of remote sensing image is very large. Furthermore  the lowest frequency subband contains the main energy of original image and reflects the coarse of original image after remote sensing image is transformed by wavelet  so it is very important to the reconstructed image. Therefore a hybrid image compression method based on Listless Zerotree Coding (LZC) and DPCM is presented  namely  the lowest frequency subband is compressed by DPCM and others are compressed by LZC. LZC is a kind of zerotree coding algorithm for hardware implementation  which is based on SPIHT and substitutes two significant bit maps for three lists in SPIHT algorithm. Thereby LZC significantly reduces the memory requirement and complexity during encoding and decoding procedure. But LZC doesn't recognize the significance of grandchild sets  so the PSNR values of LZC are lower than SPIHT's and the compression speed drops. It is improved by adding a significant bit map that recognizes the significance of grandchild sets. A comparison reveals that the PSNR results of the hybrid compression method are 2 dB higher than those of LZC  and the compression speed is also improved.