地质力学学报2018，Vol.24Issue(2)：263-273,11.DOI:10.12090/j.issn.1006-6616.2018.24.02.028
面向对象的喀斯特地区石漠化遥感信息提取研究——以贵州省大方地区为例
OBJECT-ORIENTED REMOTE SENSING INFORMATION EXTRACTION METHOD FOR ROCKY DESERTIFICATION IN KARST AREA—A CASE STUDY OF DAFANG COUNTY,GUIZHOU
摘要
Abstract
The existing pixel-based supervised and unsupervised classification methods can′t meet the requirements of rocky desertification information extraction accuracy in karst rocky desertification area under the circumstances of complicated geological environment, large topographic relief and obvious shadows.In order to improve the accuracy of remote sensing image information extraction,texture feature data and topographic data are used to assist the object oriented method in the rocky desertification information extraction in karst rocky desertification area.Firstly, based on the characteristics of rocky desertification with uneven image sizes in TM/ETM +, the optimal segmentation parameters are calculated using texture and terrain factors to conduct multi-scale segmentation.Secondly, the grading indexes of rocky desertification are established based on vegetation coverage rates, rock exposure rates and slope factors.Finally, according to the grading rules of rocky desertification, spectral information and texture features,the information of rocky desertification in Karst area is extracted.The temporal TM/ETM+images of rocky desertification areas in DaFang, Guizhou, are selected for rocky desertification information extraction.The results show that comparing with pixel-based supervised classification and unsupervised classification methods, the object-oriented classification technology can effectively reduce the"salt and pepper phenomenon"caused by complicated topography, and the extraction accuracy is much better.关键词
喀斯特石漠化/面向对象分类/监督分类/非监督分类/信息提取/大方地区Key words
karst rocky desertification/object-oriented classification/supervised classification/unsupervised classification/information extraction/Dafang County分类
信息技术与安全科学引用本文复制引用
周迪,倪忠云,杨振宇..面向对象的喀斯特地区石漠化遥感信息提取研究——以贵州省大方地区为例[J].地质力学学报,2018,24(2):263-273,11.基金项目
四川省教育厅项目(16ZA0080) （16ZA0080）
2016年成都理工大学校级教学改革及课程建设项目(11100-16z056919) （11100-16z056919）
