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基于多尺度擴張卷積神經(jīng)網(wǎng)絡的城中村遙感識別
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國家重點研發(fā)計劃項目(2018YFE0122700),、國家自然科學基金項目(42001367,、42171113)和資源與環(huán)境信息系統(tǒng)國家重點實驗室開放基金項目


Identification of Urban Villages from Remote Sensing Image Based on Multi-scale Dilated Convolutional Neural Network
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    摘要:

    城中村是我國快速城市化進程中的一個特殊產(chǎn)物,通常存在人口密集,、建筑私自改造等問題。開展城中村的識別和監(jiān)測對城鄉(xiāng)統(tǒng)籌規(guī)劃以及精細化治理等具有重要意義,?;谏疃葘W習提出了一種新的城中村遙感識別模型,該模型包括一個多尺度擴張卷積模塊和一個非局部特征提取模塊,,前者能夠聚合多層級空間特征以適應城中村形狀,、尺度的變異性;后者用于提取全局語義特征以提高城中村的類間可分性,。選取北京市二環(huán)與六環(huán)之間的區(qū)域作為研究區(qū),,實驗結(jié)果表明本文模型取得了較好的識別效果,總體精度可達94.27%,,Kappa系數(shù)為0.8839,,且效果優(yōu)于傳統(tǒng)模型。本文研究表明,,基于多尺度擴張卷積神經(jīng)網(wǎng)絡進行城中村遙感識別是可行且有效的,,可為城鄉(xiāng)統(tǒng)籌規(guī)劃提供精確的城中村空間分布數(shù)據(jù)。

    Abstract:

    Urban villages (UVs) belong to a special product of China’s rapid urbanization process, which have similar properties to the informal settlements abroad. Specifically, UVs in China usually have a high population density due to the reconstruction of buildings, making it a big challenge in China’s urban and rural sustainable development. Especially under the background of “promoting the newtype urbanization” issued by the government, timely and accurate identification of UVs is of great significance to both urbanrural planning and urban fine management. Researchers usually obtain the spatial information of UVs by field research in traditional studies, which is both laboursome and tedious. Remote sensing, on the other hand, has the merits of synoptic view, dynamic and fast screening of the earth surface, which has been recently applied in the recognition of UVs. Meanwhile, deep learning has shed new light on UVs’identification due to its capability in learning high-level abstract image features, however, it has been rarely documented in the mapping of UVs. Therefore, the objective was to propose a deep learning model for UVs’recognition from very high resolution (VHR) remote sensing images. In specific, the proposed model was a multi-scale dilated convolutional neural network (MD-CNN), which included a series of multi-scale dilated convolutions and a non-local feature extraction module. The former can aggregate multi-level spatial features to adapt to the variability of UVs’shapes and scales, while the latter extracted global semantic features to improve the inter-class divisibility. The experimental results in Beijing City showed that the proposed model achieved good performance with an overall accuracy of 94.27% and a Kappa coefficient of 0.8839, which was better than that of several previous deep learning models such as VGG, ResNet and DenseNet. The research result demonstrated that by using the deep learning model, it was feasible and effective to accurately identify UVs from VHR remote sensing images, which could provide useful geo-spatial distribution of UVs for urban-rural planning.

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馮權(quán)瀧,陳泊安,牛博文,任燕,王瑩,劉建濤.基于多尺度擴張卷積神經(jīng)網(wǎng)絡的城中村遙感識別[J].農(nóng)業(yè)機械學報,2021,52(11):181-189,218. FENG Quanlong, CHEN Boan, NIU Bowen, REN Yan, WANG Ying, LIU Jiantao. Identification of Urban Villages from Remote Sensing Image Based on Multi-scale Dilated Convolutional Neural Network[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(11):181-189,,218.

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  • 收稿日期:2020-11-19
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  • 在線發(fā)布日期: 2021-11-10
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