遥感信息
遙感信息
요감신식
2015年
2期
116-119
,共4页
Landsat-8%遥感图像处理%大气校正%光谱响应函数%FLAASH
Landsat-8%遙感圖像處理%大氣校正%光譜響應函數%FLAASH
Landsat-8%요감도상처리%대기교정%광보향응함수%FLAASH
Landsat-8%image preprocessing%atmospheric correction%spectral response function%FLAASH
针对受大气吸收与散射影响，遥感器得到的测量值与目标物的真实值间存在误差，给反演地表反射率／反照率和地表温度等关键参数带来较大误差，影响图像分析精度的问题，该文利用 Landsat-8的光谱响应函数，对OLI 多光谱数据进行大气辐射校正和反射率反演，对校正前后的地物光谱曲线和归一化植被指数（Normalized Difference Vegtation Index，NDVI）的变化进行了对比。研究表明：OLI 大气校正后较好地恢复各类地物光谱的典型特征；大气校正后 NDVI 增幅明显；类似的基于光谱响应函数的 FLAASH 大气校正方法可以为其他的高级陆地成像仪等传感器校正提供依据。
針對受大氣吸收與散射影響，遙感器得到的測量值與目標物的真實值間存在誤差，給反縯地錶反射率／反照率和地錶溫度等關鍵參數帶來較大誤差，影響圖像分析精度的問題，該文利用 Landsat-8的光譜響應函數，對OLI 多光譜數據進行大氣輻射校正和反射率反縯，對校正前後的地物光譜麯線和歸一化植被指數（Normalized Difference Vegtation Index，NDVI）的變化進行瞭對比。研究錶明：OLI 大氣校正後較好地恢複各類地物光譜的典型特徵；大氣校正後 NDVI 增幅明顯；類似的基于光譜響應函數的 FLAASH 大氣校正方法可以為其他的高級陸地成像儀等傳感器校正提供依據。
침대수대기흡수여산사영향，요감기득도적측량치여목표물적진실치간존재오차，급반연지표반사솔／반조솔화지표온도등관건삼수대래교대오차，영향도상분석정도적문제，해문이용 Landsat-8적광보향응함수，대OLI 다광보수거진행대기복사교정화반사솔반연，대교정전후적지물광보곡선화귀일화식피지수（Normalized Difference Vegtation Index，NDVI）적변화진행료대비。연구표명：OLI 대기교정후교호지회복각류지물광보적전형특정；대기교정후 NDVI 증폭명현；유사적기우광보향응함수적 FLAASH 대기교정방법가이위기타적고급륙지성상의등전감기교정제공의거。
Affected by atmospheric absorption and scattering,there is an error between the true value and the measured value obtained from remote sensor.It caused a big deviation on inversing parameters,such as surface albedo and surface temperature and also affected the accuracy of the image.In order to solve these problems,atmospheric radiation and reflectance were retrieved from OLI multi-spectral data with Landsat-8 spectral response function.Comparing the corrected spectral reflective curve and normalized difference vegetation index with the uncorrected one,we can see that this method has a better recovery of spectrum characteristics on various typical objects and NDVI index increases significantly after atmospheric correction of OLI image.This atmospheric correction method based on the FLAASH of spectral response function lays a foundation for calibration of other sensors such as the Advanced Land Imager.
