本文關(guān)鍵詞：基于光譜匹配的熱紅外高光譜數(shù)據(jù)巖性分類(lèi)研究　出處：《現(xiàn)代地質(zhì)》2016年01期 　論文類(lèi)型：期刊論文

  更多相關(guān)文章： 熱紅外高光譜 光譜特征 光譜離散能級(jí)波形匹配法 甘肅柳園地區(qū) 巖性分類(lèi)

【摘要】：從巖石光譜出發(fā),結(jié)合光譜譜帶強(qiáng)度特征和光譜波形特征,針對(duì)機(jī)載熱紅外高光譜數(shù)據(jù)(TASI),在以往算法基礎(chǔ)上,提出一種改進(jìn)的算法——光譜離散能級(jí)波形匹配法(SDEM),并將其運(yùn)用到巖性分類(lèi)研究中。SDEM算法能識(shí)別巖石光譜間的微小差異,并在充分考慮光譜譜帶強(qiáng)度和波形特征的同時(shí),有效減弱數(shù)據(jù)噪聲。與傳統(tǒng)的巖性分類(lèi)方法——高光譜角度制圖法(SAM)相比,改進(jìn)的算法能更精確地區(qū)分巖石相似光譜,識(shí)別易混淆巖性,對(duì)出現(xiàn)"異物同譜"現(xiàn)象的巖石也具有更好的區(qū)分能力。將SDEM、SAM方法應(yīng)用于甘肅柳園地區(qū)TASI數(shù)據(jù)巖性分類(lèi)研究中,可看出SDEM方法能識(shí)別出SAM未識(shí)別或識(shí)別錯(cuò)誤的巖性。通過(guò)研究區(qū)野外查證,可知SDEM方法所得巖性分類(lèi)結(jié)果更符合巖石實(shí)際分布情況�？梢�(jiàn)光譜離散能級(jí)波形匹配法具有較好的巖性分類(lèi)效果,能更好地區(qū)分地物。
[Abstract]:Based on the rock spectrum, combined with the spectral band intensity and spectral waveform characteristics, the airborne thermal infrared hyperspectral data are analyzed on the basis of previous algorithms. An improved algorithm, the spectral discrete energy level waveform matching method, is proposed and applied to the lithologic classification study. The SDEM algorithm can identify the small differences between the spectra of rocks. At the same time, the intensity and waveform characteristics of spectral band are fully considered, and the data noise is effectively reduced, compared with the traditional lithology classification method, the hyperspectral angle mapping method (SAM). The improved algorithm can distinguish the similar spectrum of rock more accurately, identify the lithology easily, and have better ability to distinguish the rock with the phenomenon of "same spectrum of foreign body". The SAM method is applied to the lithology classification of TASI data in Liuyuan area of Gansu Province. It can be seen that SDEM method can recognize the lithology of SAM which is not recognized or wrong. The results of lithologic classification obtained by SDEM method are more in line with the actual distribution of rocks, and visible spectrum discrete energy level waveform matching method has better lithologic classification effect and can distinguish ground objects better.
【作者單位】： 中國(guó)地質(zhì)大學(xué)(北京)地球科學(xué)與資源學(xué)院;
【基金】：中國(guó)地質(zhì)調(diào)查局項(xiàng)目“熱紅外高光譜礦化蝕變礦物提取方法研究與應(yīng)用示范”(12120113099600)
【分類(lèi)號(hào)】：P627
【正文快照】： 0引言高光譜遙感具有多而窄的連續(xù)光譜,光譜分辨率可達(dá)納米級(jí),可獲得影像中每個(gè)像元的精細(xì)光譜,包含了表現(xiàn)地物空間分布特征的空間、輻射和光譜三重信息,具有“圖譜合一”的特點(diǎn)[1]。地物的光譜特性是高光譜遙感的基礎(chǔ)。巖石熱紅外波段發(fā)射率光譜特征與其晶格中原子基團(tuán)的基頻，

本文編號(hào)：1370931