期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
Refined empirical line method to calibrate IKONOS imagery
1
作者 XU Jun-feng HUANG Jing-feng 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第4期641-646,共6页
To extract quantitative biophysical parameters such as leaf biomass and leaf chlorophyll concentration from the remotely sensed imagery, the effect of atmospheric attenuation must be removed. The refined empirical li... To extract quantitative biophysical parameters such as leaf biomass and leaf chlorophyll concentration from the remotely sensed imagery, the effect of atmospheric attenuation must be removed. The refined empirical line (REL) method was used to calibrate the IKONOS multispectral imagery. The IKONOS digital numbers (DN) were converted to the at-satellite reflectance, then the linear relation between at-satellite reflectance and surface spectral reflectance (ρA) was derived from six bright targets of known reflectance in the image, and modelled estimates of the image reflectance at ρA=0. Validation targets were used to test the feasibility of REL method. The mean relative errors between ρA retrieved from IKONOS image using REL method and ground-measured ρA were 11%, 13%, 3% and 5% in the IKONOS blue, green, red and near-infrared (NIR) respectively. When dark targets are unavailable or measurement of dark target is inconvenient, the REL method was most crucial for retrieving surface spectral reflectance. The REL offers a simple approach for quantitative retrieval of biophysical parameters from IKONOS imagery. 展开更多
关键词 CALIBRATION Refined empirical line (REL) method IKONOS
下载PDF
Research on Gaussian distribution preprocess method of infrared multispectral image background clutter
2
作者 张伟 武春风 +1 位作者 邓盼 范宁 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2004年第5期513-515,共3页
This paper introduces a sliding-window mean removal high pass filter by which background clutter of infrared multispectral image is obtained. The method of selecting the optimum size of the sliding-window is based on ... This paper introduces a sliding-window mean removal high pass filter by which background clutter of infrared multispectral image is obtained. The method of selecting the optimum size of the sliding-window is based on the skewness-kurtosis test. In the end, a multivariate Gaussian distribution mathematical expression of background clutter image is given. 展开更多
关键词 infrared multispectral imagery background clutter Sliding-window mean removal Skewness-kurtosis test multivariate Gaussian distribution
下载PDF
遥感技术及其应用
3
《电子科技文摘》 1999年第9期145-146,共2页
Y98-61446-103 9914548RAMOS(俄美观测卫星)与支援联合试验=RAMOS(Russian American observation satellites) and supportingjoint experiments[会,英]/Stair,A.T.& Carpenter,J.//1998 IEEE Aerospace Conference Proceedings,Vol... Y98-61446-103 9914548RAMOS(俄美观测卫星)与支援联合试验=RAMOS(Russian American observation satellites) and supportingjoint experiments[会,英]/Stair,A.T.& Carpenter,J.//1998 IEEE Aerospace Conference Proceedings,Vol.5 of 5.—103~113(PV) 展开更多
关键词 遥感技术 观测卫星 航天传感器 反射边界 热红外遥感 试验 应用 多谱成象 源函数 支援
原文传递
非电量测量与设备
4
《电子科技文摘》 2000年第11期88-89,共2页
SPIE-Vol.3543 00188961998年 SPIE 会议录.卷3543:精确农业与生物品质= 1998 proceedings of SPIE,Vol.3543:precision agricul-ture and biological quality[会,英]/SPIE-the Internation-al Society for Optical Engineering.—1998.... SPIE-Vol.3543 00188961998年 SPIE 会议录.卷3543:精确农业与生物品质= 1998 proceedings of SPIE,Vol.3543:precision agricul-ture and biological quality[会,英]/SPIE-the Internation-al Society for Optical Engineering.—1998.—390P.(PC)本会议录收集了于1998年11月3~4日在美国麻州波斯顿召开的精确农业与生物品质专题讨论会上发表的44篇论文。内容涉及农业与生物系统用的光谱测定法和传感系统.生物制品分类与内部检查用的成象技术,谷类产品质量评估用的成象法。以及多谱成象应用等。 展开更多
关键词 精确农业 会议录 测定法 质量评估 多谱成象 传感系统 专题讨论会 生物制品 成象技术 生物系统
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部