CAJ | 학술논문

针对“波谱库-影像”多光谱遥感影像波段模拟方法中波谱库以矿物质类别为主、忽略大气环境和成像时间对地物波谱影响的问题，以及“参考影像-影像”影像波段模拟方法中地物混合像元和不同空间分辨率像元间模拟的尺度效应问题，提出基于局部地物端元提取的遥感影像波段模拟方法。首先对与待模拟影像具有相似地物类别组成的参考影像进行光谱聚类分割，形成影像局部区域；然后提取各个局部区域的地物端元，并对地物端元进行优选形成地物端元样本集；接着利用端元样本集建立地物端元波谱间的关系模型；最后利用关系模型预测目标影像波段。首先通过模拟Landsat TM5影像的蓝光波段，验证方法的稳定性和可靠性；然后通过模拟IRS-P6影像的蓝光波段，验证方法的适用性和推广性；并在实验过程中同已有的“波谱库-影像”波段模拟方法和“参考影像-影像”波段模拟方法进行视觉效果对比和定量统计分析，进一步表明方法对各类地物均有较好的模拟效果，能够准确地表达地物的真实波谱。
침대“파보고-영상”다광보요감영상파단모의방법중파보고이광물질유별위주、홀략대기배경화성상시간대지물파보영향적문제，이급“삼고영상-영상”영상파단모의방법중지물혼합상원화불동공간분변솔상원간모의적척도효응문제，제출기우국부지물단원제취적요감영상파단모의방법。수선대여대모의영상구유상사지물유별조성적삼고영상진행광보취류분할，형성영상국부구역；연후제취각개국부구역적지물단원，병대지물단원진행우선형성지물단원양본집；접착이용단원양본집건입지물단원파보간적관계모형；최후이용관계모형예측목표영상파단。수선통과모의Landsat TM5영상적람광파단，험증방법적은정성화가고성；연후통과모의IRS-P6영상적람광파단，험증방법적괄용성화추엄성；병재실험과정중동이유적“파보고-영상”파단모의방법화“삼고영상-영상”파단모의방법진행시각효과대비화정량통계분석，진일보표명방법대각류지물균유교호적모의효과，능구준학지표체지물적진실파보。
A method for generating natural color composite of satellite images based on local endmembers of ground features was proposed .First ,the reference satellite image which has similar land cover types with the target satellite image is segmented into multiple local patches .Secondly ,endmembers of ground features are extracted from each local patch ,then we choose better end-members and gather them into a sample set .Thirdly ,we use the sample set to build up the relationship between the spectral val-ues of the blue band and the other bands .Finally ,the spectrum relationship is used to generate natural color composite of the target image .The verification experiment on Landsat TM5 images shows that the proposed method is reliable and stable to gen-erate the natural color composite of images .The other experiment on IRS-P6 images shows that our method is able to promote for other satellite images .In experiments ,we also compared the existing “reference image-image” method and“spectral library-image” method qualitatively and quantificationally ,indicating that our method is more precise to simulate spectrums of all kinds of ground features .