CAJ | 학술논문

以永安市的 DEM 数据和 HJ-1多光谱影像为数据源，研究不同坡度、坡向、海拔等地形条件下竹资源的光谱反射率曲线及辅助于地形因子的竹资源专题信息提取效果。结果表明，海拔、坡向对竹资源的光谱反射率影响大，而坡度影响小，在海拔400m～800m 和800m～1200m 范围内阳坡、半阳坡、阴坡、半阴坡的竹资源的光谱反射率差异最为明显。采用最大似然法结合地形因子辅助分类提取的竹资源专题信息精度为74．50％，比单纯依靠光谱信息分类的精度高14个百分点，说明地形因子对竹资源专题信息提取具有很大帮助，可以辅助解决“同物异谱”和“异物同谱”问题。
이영안시적 DEM 수거화 HJ-1다광보영상위수거원，연구불동파도、파향、해발등지형조건하죽자원적광보반사솔곡선급보조우지형인자적죽자원전제신식제취효과。결과표명，해발、파향대죽자원적광보반사솔영향대，이파도영향소，재해발400m～800m 화800m～1200m 범위내양파、반양파、음파、반음파적죽자원적광보반사솔차이최위명현。채용최대사연법결합지형인자보조분류제취적죽자원전제신식정도위74．50％，비단순의고광보신식분류적정도고14개백분점，설명지형인자대죽자원전제신식제취구유흔대방조，가이보조해결“동물이보”화“이물동보”문제。
The effect of the bamboo thematic information extraction assisted by the terrain factors and the spectral reflectance curve of bamboo resources in different terrain conditions (slope,aspect,elevation)were analyzed with the DEM data and RS data in Yong’an City.The results show that the most impact terrain factors on the spectral reflectance curve of bamboo resources are altitude and aspect,the less impact factors is slope.There are obvious differences on the spectral reflectance curve of bamboo resources between the altitude of 400m~800m and 800m~1200m under the sunny aspect,semi-sunny aspect,shady aspect and semi-shady aspect.The accuracy of bamboo thematic information extraction by the maximum likelihood method with the help of the terrain factors is 74.50% which is 14 point higher than the classification based on spectral information only.It shows that the terrain factors could be great help for the bamboo thematic information extraction and could solve problems in the images about “the same object with different spectrums”and “the same spectrum for different objects”.