基于ERDAS實現(xiàn)對黃河源區(qū)濕地生態(tài)類型識別


頁數(shù)：22 字數(shù)：10512


摘要：黃河源區(qū)濕地是一個極其敏感和脆弱的生態(tài)系統(tǒng)，生物物種豐富，一旦破壞難以恢復。濕地不僅對源區(qū)本身起著調(diào)節(jié)溫度、涵養(yǎng)水源的作用，還為野生動物提供食物和繁殖的場所。本文嘗試基于NDVI、TM4、纓帽變換濕度分量進行密度分割和基于LBV變換圖像進行分類的方法達到識別黃河河源濕地生態(tài)類型的研究目標。
關鍵詞：黃河源；濕地；LBV變換；密度分割；圖像分類
Abstract
The wet lands located at the source of Yellow River are an extremely sensitive and weak ecosystem with abundant biodiversity. If destroyed, it will be quite hard to restore. The wet lands not only have the function of adjusting the temperature and preserving the water ,but also have the function of supplying the food and habitat to wild animals. This article attempts to attain the research goal that is identifying the ecotypes of wet lands located at the source of Yellow River on the basis of the operation of slicing which was imposed on NDVI 、TM4 and the wetness component derived from the Tasseled cap transform and the operation of classification which was implemented based on the characteristic images coming from LBV transform.
Key words: The source of Yellow River, wet land, LBV transform, density slice, Classification


目 錄
摘 要
1.前言…………………………………………………………………………………………1
2.黃河源區(qū)濕地的概況……………………………………………………………………1
2.1黃河源區(qū)構(gòu)造成因及地貌特點………………………………………………………1
2.2黃河源區(qū)的濕地生態(tài)環(huán)境……………………………………………………………2
2.3黃河源區(qū)對源區(qū)本身及黃河流域生態(tài)環(huán)境的影響…………………………………2
3.黃河源區(qū)濕地生態(tài)影像特征選擇提取的技術(shù)支持…………………………3
3.1遙感數(shù)據(jù)源……………………………………………………………………………3
3.2黃河源區(qū)濕地制圖的數(shù)據(jù)選擇及其結(jié)合方式………………………………………5
4.通過密度分割識別濕地生態(tài)類型……………………………………………………5
4.1基于NDVI灰度圖像識別濕地植被生態(tài)類型…………………………………………6
4.2基于TM4灰度圖像識別濕地水體生態(tài)類型…………………………………………7
4.3基于纓帽變換濕度特征量區(qū)分干燥地表與濕潤地表………………………………9
5.通過圖像分類實現(xiàn)濕地生態(tài)類型的識別…………………………………………10
5.1監(jiān)督分類的概念………………………………………………………………………10
5.2訓練樣本的選擇及評價………………………………………………………………11
5.3分類算法………………………………………………………………………………12
5.4 LBV變換………………………………………………………………………………12
5.5分類結(jié)果………………………………………………………………………………16
6.結(jié)語…………………………………………………………………………………………17
附錄……………………………………………………………………………………………18
致 謝…………………………………………………………………………………………19
參考文獻………………………………………………………………………………………20