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基于光譜解混的城市地物分類研究
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湖南省自然科學(xué)基金項(xiàng)目(2017JJ2072、2017JJ3056)


Investigation on Urban Object Classification Based on Spectral Unmixing
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    摘要:

    高光譜遙感信息提取面臨的突出問題是混合像元的廣泛存在,如何有效地解譯混合像元是高光譜遙感應(yīng)用的關(guān)鍵問題?;旌舷裨粌H影響地物的識(shí)別和分類精度,而且是遙感技術(shù)向定量化發(fā)展的重要障礙,混合像元分解是解決混合像元問題最有效的方法,能夠克服高光譜圖像空間分辨率的限制。針對(duì)傳統(tǒng)混合像元分解算法的缺點(diǎn),基于優(yōu)化的候選端元判斷方法及端元提取的并行設(shè)計(jì)方法,提出了一種優(yōu)化的混合像元分解方法,實(shí)現(xiàn)了光譜特征信息和空間特征信息的有機(jī)融合。通過(guò)模擬高光譜數(shù)據(jù)和真實(shí)遙感圖像進(jìn)行仿真研究,實(shí)驗(yàn)結(jié)果表明,該方法能得到精確的端元和對(duì)應(yīng)的豐度,獲得較好的解混效果,為城市地物分類提供了有力支持。

    Abstract:

    One of the prominent problems in hyperspectral remote sensing is the existing of mixed pixel widely. How to effectively interpret mixed pixels is an important problem of hyperspectral remote sensing applications. It is not only a problem of mixed pixels effects identification and classification precision of objects, but also a major barrier for the development of remote sensing technology. Mixed pixel decomposition, which is the most effective method to solve the mixed pixel problem, can break through the limitation of spatial resolution. Aiming to the shortcoming of the traditional algorithm of mixed pixel decomposition, an improved method of mixed pixels was put forward, which can take account of the spatial correlation of spectral information and spectral information, and multi-core parallel processing method to raise its efficiency. The endmembers were automatically extracted, and the abundance charts corresponding to each endmember were obtained at the same time. The performance of the proposed algorithm was verified by using actual hyperspectral image. The experimental results on simulated and real hyperspectral image demonstrated that the proposed algorithm can overcome the shortcomings of traditional method and obtain more accurate endmembers and corresponding abundance, which can provide a strong support for urban object classification.

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黃作維,胡光偉,謝世雄.基于光譜解混的城市地物分類研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2018,49(10):205-211. HUANG Zuowei, HU Guangwei, XIE Shixiong. Investigation on Urban Object Classification Based on Spectral Unmixing[J]. Transactions of the Chinese Society for Agricultural Machinery,2018,49(10):205-211.

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  • 收稿日期:2017-11-30
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  • 在線發(fā)布日期: 2018-10-10
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