干旱区生态环境知识资源中心(Arid): 基于决策树方法的干旱区盐渍地信息提取以渭干河-库车河三角洲绿洲为例

Arid

	基于决策树方法的干旱区盐渍地信息提取以渭干河-库车河三角洲绿洲为例
其他题名	The Extraction of Saline Soil Information in Arid Area based on Decision Tree Algorithm:A Case Study in the Delta Oasis of Weigan and Kuqa Rivers
	何祺胜; 塔西甫拉提·特依拜; 丁建丽
ISSN	1007-7588
出版年	2006
卷号	28 期号:6 页码:134-140
中文摘要	以渭干河-库车河三角洲绿洲为例,探讨了干旱区盐生植被红柳覆盖的盐渍地信息的提取方法.利用TM卫星图像数据,分析了研究区主要地物的光谱特征及其波段间的相互运算,从而分析不同地物之间的可分性.研究表明:K-L-3(第三主成分)是提取重度盐渍地信息的最佳波段,TM1是区分红柳覆盖区(轻、中度)盐渍地信息的最佳波段,提取盐渍地信息时混分的水体信息可以通过MNDWI(改进归一化差异水体指数)设定一定的阈值予以剔除,混分的植被信息可以通过NDVI设定一定的阈值予以剔除.根据以上分析,建立决策树模型,在各节点设计不同的分类器,最后得到盐渍地信息的提取结果.然后进行精度评价,结果表明,该方法的总体提取效果较好,是干旱区监测盐渍地变化的有效手段.
英文摘要	Extraction of saline soil information from remotely sensed images is significant in arid area for surveying the change of saline soil. In this paper, taking the delta oasis of Weigan and Kuqa rivers as the example, TM image collected on Aug 2001 was used. The approach of effective remote-sensing information extraction for saline soil was discussed. The mechanism and characteristics of saline soil and other objects in TM imagery were analyzed to find the possibility of extracting saline soil from the background. With the detailed analysis and clarification of several existing indices, the study selects four indices, the third principal component (K-L-3), the blue wavelength (TM1), the modified normalized difference water index (MNDWI) and the normalized difference vegetation index (NDVI) . The research shows that K-L-3 is the best band to extract severe saline soil information, TM1 is the best band to differentiate saline soil information with the salt-tolerant vegetation of Hongliu and the mixed water body and vegetation information can be separated by the index of MNDWI and NDVI. The index of NDVI can accurately differentiate vegetation information from other objects. There is only vegetation whose spectrum lightness value in NDVI band surpasses 0. So it is easy to extract vegetation information from the background. The modified normalized difference water index (MNDWI) is defined by Xu Han-qiu (2005) based on the normalized difference water index (NDWI) of Mcfeeters (1996) , which uses MIR (TM5) instead of NIR (TM4) to construct the index. It has been tested that the MNDWI can accurately extract the water body information from the study area more than the NDWI. The paper also analyzed the application of Karhunen-Loeve transformation for extracting severe saline soil information. The study shows that although the first and second principal component account for 98.69 % of total information, they cannot effectively extract saline soil information. The third principal component only accounts for 1.09 % of total information, but it is the best band for extracting severe saline soil information. The third principal component enhances the information of water body and severe saline soil information. Then, based on the analysis, a simple model of decision tree was applied for extracting saline soil information. Finally, the results were checked by statistical accuracy assessment. The results suggest that the model of decision tree is simple and effective and the precision of this approach is very high, so it is an effective method for monitoring saline soil changes in arid area.
中文关键词	遥感 ; 决策树 ; 盐渍地信息提取 ; NDVI MNDWI K-L变换
英文关键词	Remote Sensing Decision tree Extraction of saline soil information NDVI MNDWI K-L transformation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:2610867
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220587
作者单位	新疆大学资源与环境科学学院, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	何祺胜,塔西甫拉提·特依拜,丁建丽. 基于决策树方法的干旱区盐渍地信息提取以渭干河-库车河三角洲绿洲为例[J]. 新疆大学,2006,28(6):134-140.
APA	何祺胜,塔西甫拉提·特依拜,&丁建丽.(2006).基于决策树方法的干旱区盐渍地信息提取以渭干河-库车河三角洲绿洲为例.,28(6),134-140.
MLA	何祺胜,et al."基于决策树方法的干旱区盐渍地信息提取以渭干河-库车河三角洲绿洲为例".28.6(2006):134-140.