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1.西安建筑科技大学 信息与控制工程学院, 陕西 西安 710055
2.清华大学建筑设计院有限公司, 北京 100084
[ "徐胜军(1976-), 男, 陕西西安人, 工学博士, 副教授, 硕士生导师, 主要从事图像处理、模式识别领域的研究。E-mail:duplin@sina.com" ]
欧阳朴衍(1993-), 男, 山西长治人, 硕士研究生, 主要从事图像处理、遥感图像等方面的研究。E-mail:jokerman1993@foxmail.com OUYANG Pu-yan, E-mail:jokerman1993@foxmail.com
收稿日期:2020-01-02,
修回日期:2020-03-02,
录用日期:2020-3-2,
纸质出版日期:2020-07-15
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徐胜军, 欧阳朴衍, 郭学源, 等. 多尺度特征融合空洞卷积ResNet遥感图像建筑物分割[J]. 光学 精密工程, 2020,28(7):1588-1599.
Sheng-jun XU, Pu-yan OUYANG, Xue-yuan GUO, et al. Building segmentation in remote sensing image based on multiscale-feature fusion dilated convolution resnet[J]. Optics and precision engineering, 2020, 28(7): 1588-1599.
徐胜军, 欧阳朴衍, 郭学源, 等. 多尺度特征融合空洞卷积ResNet遥感图像建筑物分割[J]. 光学 精密工程, 2020,28(7):1588-1599. DOI: 10.37188/OPE.20202807.1588.
Sheng-jun XU, Pu-yan OUYANG, Xue-yuan GUO, et al. Building segmentation in remote sensing image based on multiscale-feature fusion dilated convolution resnet[J]. Optics and precision engineering, 2020, 28(7): 1588-1599. DOI: 10.37188/OPE.20202807.1588.
针对传统建筑物提取方法难以有效描述遥感图像细节特征,导致复杂场景下道路、树木及建筑物之间分割边界不清晰等问题,提出了一种基于多尺度特征融合空洞卷积ResNet(Multiscale-feature Fusion Dilated Convolution ResNet,MFDC-ResNet)模型。首先,为了获取遥感图像建筑物更大范围的特征信息,在深度残差网络中引入空洞卷积增大特征提取的感受野,以捕捉更丰富的多尺度细节特征;其次,为了增强空洞卷积中心点对图像局部区域特征的表达能力,利用3×3卷积核提取遥感图像的中心点区域特征,引入更多的中心点空间先验信息;最后,利用空间金字塔池化模型对不同尺度空洞卷积特征进行融合,获取不同尺度的遥感图像建筑物的上下文信息。在WHU遥感图像数据集上的实验表明,平均交并比mIoU达到0.820,召回率Recall达到0.882。提出算法不仅提高了分割精度,而且有效克服了道路、树木等因素的干扰,得到了较清晰的建筑物边界。
To solve the problem in which a traditional ResNet101 model cannot effectively describe the detailed features of remote sensing images
leading to the unclear segmentation boundary between roads
trees
and buildings in complex scenes
a Multiscale-feature Fusion Dilated Convolution ResNet (MFDC-ResNet) was proposed. First
to obtain large-scale building feature information of remote sensing images
a dilated convolution was introduced in the deep residual network to capture richer multi-scale details. Second
to enhance the expression ability of the center point of dilated convolution on the building of feature images
a 3×3 convolution kernel was proposed to extract features in the local area of remote sensing images. Finally
a spatial pyramid pool model of multi-scale feature fusion was proposed to fuse the multi-scale features
obtain the building contextual information of different scales of remote sensing images
and complete the accurate segmentation of buildings. The results of the experiments show that the mean Intersection over Union (mIoU) of building segmentation in WHU is 0.820 and the recall rate is 0.882. The developed method can effectively overcome the influence of roads
trees
and other factors. Moreover
the building boundary can be extracted clearly and smoothly from the remote sensing images and the segmentation accuracy is improved.
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