摘要
西藏墨脱高等级公路方案线穿越冰川作用强烈的南迦巴瓦峰地区, 为查明该区冰川活动对公路工程的影响, 以ETM+为信息源, 以图像统计量为基础, 运用遥感数字图像处理技术, 对该区冰川进行了图像光谱信息提取与分析.冰川在 TM5、7 波段光谱值范围窄, 且冰碛与冰雪有明显的光谱差异, 是冰川信息提取的有利波段. 包含TM5、7的多波段图像K—L变换的最后主组分是TM5、7的差值图像, 主要反映的是图像中的冰川信息.这种基于图像变换、信息分离提取冰川信息的方法, 在西藏墨脱高等级公路工程勘察中取得了较好的应用效果.
The high-rank Mêdog highway in Tibet Autonomous Region traverses through the Namjagbarwa region, where there are many temperate glaciers. In order to understand the impact of glaciers on the Mêdog highway, a study is made to analyze and extract spectrum of glaciers with ETM~~ image by mans of remote sensing digital image processing based on image statistics datum. Glacier has a narrow spectrum on TM5, 7 bands, but moraine and snow and ice are different in evidence, therefore, TM5, 7 are advantageous bands for extracting glacier information. The last principal component image, which is brought by K-L transformation with multiple band images, including TM5, 7, is a differential image of both TM5 and TM7, and mainly reflects the glacier information of image. A good result has achieved with the way of image transformation and information separation to extract the glacier information for the Mêdog highway engineering surveying.
出处
《冰川冻土》
CSCD
北大核心
2005年第2期226-232,共7页
Journal of Glaciology and Geocryology
基金
交通部第二公路勘察设计研究院委托项目<西藏墨脱公路工程地质遥感解译>资助
关键词
南迦巴瓦峰
西藏墨脱
ETM^+
海洋性冰川
信息提取
图像变换
Mt. Namjagbarwa
Mêdog of Tibet Region
ETM~~
temperate glacier
extracting information
image transformation
