本文關(guān)鍵詞：一種提取城市多種不透水層的垂直不透水層指數(shù)　出處：《測繪學(xué)報(bào)》2017年04期 　論文類型：期刊論文

  更多相關(guān)文章： 土壤線 不透水層線 不透水層提取 垂直不透水層指數(shù)(PII)

【摘要】：針對中低分辨率影像中不透水層的異質(zhì)性及其與裸土光譜的易混性兩類問題,選用藍(lán)、近紅外波段進(jìn)行線性組合,構(gòu)建了一種新的不透水層提取指數(shù)——垂直不透水層指數(shù)(PII)。該指數(shù)考慮了不透水層和其他地物在光譜空間的差異與不透水層的內(nèi)部異質(zhì)性,并以"不透水層線"與"土壤線"夾角的角平分線作為PII的參照線,實(shí)現(xiàn)了自適應(yīng)的不透水層提取。本文將PII指數(shù)應(yīng)用于武漢和北京不同場景中,并對比歸一化建筑物指數(shù)(NDBI)、比值居民地指數(shù)(RRI)以及生物物理組份指數(shù)(BCI)的提取結(jié)果。試驗(yàn)表明:1在裸土較少、地形平坦的武漢市區(qū)域和裸土較多、地形起伏的北京市區(qū)域,PII指數(shù)均能有效減弱裸土的混淆影響,不透水層提取精度分別達(dá)到96.05%和96.76%,優(yōu)于其他3種指數(shù);2PII指數(shù)不僅增強(qiáng)了不透水層與其他地物的可區(qū)分性,還保持了不透水層類內(nèi)的相似性,在城市不同場景中的不透水層提取精度均能達(dá)到90%以上。由于PII指數(shù)是一種線性組合形式的指數(shù),能夠根據(jù)研究區(qū)的地物光譜自適應(yīng)調(diào)整指數(shù)的方程系數(shù),從而能適用于不同研究區(qū),在裸地較多的地區(qū)優(yōu)勢尤為明顯。
[Abstract]:Aiming at the heterogeneity of impermeable layer in low and medium resolution images and its easy mixing with bare soil spectrum, blue and near infrared bands are selected for linear combination. A new extraction index of impermeable layer, perpendicular impermeable layer index, is constructed, which considers the difference between impermeable layer and other features in spectral space and the internal heterogeneity of impermeable layer. With the angle of "impermeable layer line" and "soil line" as the reference line of PII, adaptive impermeable layer extraction is realized. In this paper, the PII index is applied to different scenes in Wuhan and Beijing. The results of extraction of normalized building index (NDBI), ratio index (RRI) and biophysical component index (BCI) were compared. The experimental results showed that the ratio of 1 to 1 was less in bare soil. There are more areas and bare soils in Wuhan with flat terrain, and the PII index of Beijing area with undulating topography can effectively reduce the confusion effect of bare soil. The extraction accuracy of impermeable layer was 96.05% and 96.76, respectively, which was superior to the other three indexes. 2PII index not only enhances the distinction between impermeable layer and other features, but also maintains the similarity of impermeable layer. The extraction accuracy of impermeable layer in different city scenes can reach more than 90%. Because PII exponent is a linear combination index. The equation coefficients of the index can be adjusted adaptively according to the spectrum of the study area, so it can be applied to different research areas, especially in the regions with more bare land.
【作者單位】： 中國地質(zhì)大學(xué)(武漢)信息工程學(xué)院;
【基金】：國家重點(diǎn)研發(fā)計(jì)劃(2016YFB0502603)~~
【分類號】：P237
【正文快照】： 近年來中國各城市發(fā)展迅速,相關(guān)研究也越來越多,如城市形態(tài)的時(shí)空演變、熱島效應(yīng)、空氣污染、污水排放等[1-2]。城市建筑物和道路路面等不透水層作為城市研究的最重要組成部分,受到眾多學(xué)科的廣泛關(guān)注。這兩種地物類型在中低分辨率遙感影像中被抽象表達(dá)為“不透水層”。基于中

【相似文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 石澤平;交通出行指數(shù)與公共交通設(shè)施運(yùn)行評價(jià)研究[D];北京建筑大學(xué);2015年

，

本文編號：1435794