混合像元分解在石漠化信息提取中的應(yīng)用進(jìn)展
摘 要:為有效實(shí)現(xiàn)石漠化信息提取,概括性地從像元級(jí)和亞像元級(jí)2方面介紹石漠化信息的遙感提取方法,重點(diǎn)介紹混合像元分解技術(shù)的數(shù)據(jù)源、端元提取方法、模型算法及結(jié)果應(yīng)用,結(jié)果表明,混合像元分解技術(shù)能較好地解決混合像元問(wèn)題,為利用非線(xiàn)性混合像元分解模型開(kāi)展石漠化信息提取提供參考。
關(guān)鍵詞:石漠化;像元級(jí);亞像元級(jí);混合像元分解模型;信息提取
中圖分類(lèi)號(hào):P237 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):2095-2945(2023)05-0029-04
Abstract: In order to extract the information of stony desertification effectively, this paper briefly introduces the remote sensing extraction methods of rocky desertification information from pixel level and sub-pixel level, with emphasis on the data source, end-element extraction method, model algorithm and result application of mixed pixel decomposition technology, the results show that the mixed pixel decomposition technique can solve the mixed pixel problem well. Thus providing a reference for using nonlinear mixed pixel decomposition model to realize rocky desertification information extraction.
Keywords: rocky desertification; pixel level; sub-pixel level; mixed pixel decomposition model; information extraction
石漠化是我國(guó)西南喀斯特地區(qū)最嚴(yán)重的生態(tài)問(wèn)題之一[1],是指在人類(lèi)活動(dòng)的干擾破壞下,使喀斯特地區(qū)出現(xiàn)土壤功能喪失、基巖裸露、地表土被不連續(xù)和生產(chǎn)力下降的土地退化過(guò)程[2],會(huì)導(dǎo)致土地承載力下降、自然災(zāi)害加重和地區(qū)貧困加劇,嚴(yán)重影響當(dāng)?shù)刈匀?、?jīng)濟(jì)和社會(huì)的可持續(xù)發(fā)展。(剩余7017字)