CAJ | 학술논문

本研究针对OLI影像在辐射分辨率、近红外波段和全色波段的光谱范围以及波段数量等方面进行的调整, 与ETM+进行比较分析, 探究其对土地覆盖遥感分类的影响. 实验发现:1) 辐射分辨率的提高有利于地类之间的区分, 进而提高分类的总体精度; 2) 近红外波段范围的调整有利于识别水体边界, 对分类总体精度影响不大; 3) 新增的深蓝波段可明显提高水体、不透水层的分类精度, 进而提高总体分类精度, 卷云波段的加入不利于地类之间的区分,降低分类精度; 4) 全色波段范围的收窄可明显提高林草地、耕地的分类精度, 裸土的分类精度也有所提高, 有利于区分植被与非植被信息. 研究结果能够推广OLI影像的使用, 并对应用OLI影像进行土地覆盖分类具有借鉴意义.
본연구침대OLI영상재복사분변솔、 근홍외파단화전색파단적광보범위이급파단수량등방면진행적조정, 여ETM+진행비교분석, 탐구기대토지복개요감분류적영향. 실험발현:1) 복사분변솔적제고유리우지류지간적구분, 진이제고분류적총체정도; 2) 근홍외파단범위적조정유리우식별수체변계, 대분류총체정도영향불대; 3) 신증적심람파단가명현제고수체、 불투수층적분류정도, 진이제고총체분류정도, 권운파단적가입불리우지류지간적구분,강저분류정도; 4) 전색파단범위적수착가명현제고림초지、 경지적분류정도, 라토적분류정도야유소제고, 유리우구분식피여비식피신식. 연구결과능구추엄OLI영상적사용, 병대응용OLI영상진행토지복개분류구유차감의의.
OLI sensor has new characteristics in some bands of Landsat 7 ETM+, which may improve radiometric resolution from 8-bit to 16-bit, refine spectral range of NIR band and Pan band, add coastal band and cirrus band. The study aims to analyze new characteristics of OLI data and explore their influ-ences on land cover remote sensing classification. Results show that: (1) improving radiometric resolu-tion can help the differentiation of classes and overall accuracy of the classification;(2) spectral range adjustment of NIR band helps to identify waters boundary but has little influence on overall classification accuracy;(3) coastal band can significantly improve classification accuracy of waters and impervious layers, while the addition of cirrus band is bad for the differentiation of classes; (4) narrowing spectral range of Pan band can improve classification accuracy of grass and crop lands and bare soil obviously, hence helpful in the differentiation of vegetated and non-vegetated information.