结合RGB-DSM图像和深度学习的城市樟树树冠检测

王昊; 夏凯; 杨垠晖; 冯海林

doi:10.11834/jrs.20221613

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专辑

结合RGB-DSM图像和深度学习的城市樟树树冠检测
Urban cinnamomum camphora crown detection research using RGB-DSM images and deep learning
2023年27卷第12期页码：2762-2773
纸质出版日期： 2023-12-07 ，
DOI： 10.11834/jrs.20221613

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王昊，夏凯，杨垠晖，冯海林.2023.结合RGB-DSM图像和深度学习的城市樟树树冠检测.遥感学报，27（12）： 2762-2773

Wang H， Xia K， Yang Y H and Feng H L. 2023. Urban cinnamomum camphora crown detection research using RGB-DSM images and deep learning. National Remote Sensing Bulletin， 27（12）：2762-2773
王昊，夏凯，杨垠晖，冯海林.2023.结合RGB-DSM图像和深度学习的城市樟树树冠检测.遥感学报，27（12）： 2762-2773 DOI： 10.11834/jrs.20221613.

Wang H， Xia K， Yang Y H and Feng H L. 2023. Urban cinnamomum camphora crown detection research using RGB-DSM images and deep learning. National Remote Sensing Bulletin， 27（12）：2762-2773 DOI： 10.11834/jrs.20221613.

摘要

当前，结合遥感图像和深度学习进行单木树冠检测已经成为一种趋势。RGB图像是检测中最常用的数据类型，但由于树冠的颜色和纹理一般比较接近，在树冠密度较高的区域，仅使用RGB图像的颜色和纹理信息难以区分不同个体的树冠。对此，本研究在RGB图像的基础上，叠加了高程信息，以提高单木树冠检测的精度。实验采用彩色图像RGB图像和数字表面模型DSM（Digital Surface Model）作为数据源，并分别利用波段组合和双源检测网络模型两种方法结合RGB和DSM进行单木树冠检测。在前一种方法中，对RGB和DSM进行波段组合，生成GBD、RGD和RBD 3类图像，并使用这3类图像分别进行网络的训练和测试。在后一种方法中，将RGB和DSM输入双源检测网络模型，并得到检测结果。本文使用FPN-Faster-R-CNN和Yolov3进行实验，相比于RGB方案（仅使用地物的颜色和纹理信息进行单木树冠检测，是对照方案），FPN-Faster-R-CNN在GBD方案、RBD方案和双源检测网络方案中的平均精度分别上升了3.36%、2.45%和7.77%，在RGD方案中的平均精度下降了0.17%，Yolov3在GBD方案、RBD方案和双源检测网络方案中的平均精度分别上升了0.72%、0.14%和5.71%，在RGD方案中的平均精度下降了0.98%。在两个网络下，双源检测网络方案都在各方案中取得了最佳的检测结果。并且相对于RGB方案，双源检测网络方案在平均精度上的提升幅度随着树冠密度的上升呈现出上升的趋势。对比分析实验结果可知，在基于深度学习的城市单木树冠检测任务中，妥善结合并利用地物的颜色、纹理信息和高程信息有利于提高任务性能。

Abstract

Currently

combining remote sensing imagery with deep learning is a growing trend in individual tree crown detection. RGB image is the most commonly used data type in detection. However

given that the color and texture of the tree crowns are generally close

distinguishing the crowns of different individuals by using only the color and texture information of RGB image in areas with high density of crowns is difficult. In this study

the elevation information is superimposed to improve the accuracy of individual tree crown detection by using RGB images. In the experiment

RGB image (color image) and DSM (digital surface model) were used as data sources

and band combination and double-source detection network model were used to combine RGB and DSM for individual tree crown detection. In the former method

band combination of RGB and DSM was conducted to generate GBD

RGD

and RBD images

and the three kinds of images were used for network training and testing. In the latter method

RGB and DSM were input into the double-source detection network model

and the detection results were obtained. FPN-Faster-R-CNN and Yolov3 were used for experiments in this study. Compared with RGB scheme as the control scheme (which uses only the color and texture information of ground objects for individual tree crown detection)

the average accuracy of FPN-Faster-R-CNN in the GBD scheme

RBD scheme

and double-source detection network scheme increased by 3.36%

2.45%

and 7.77%

respectively; it decreased by 0.17% in the RGD scheme. The average accuracy of Yolov3 in the GBD scheme

RBD scheme

and double-source detection network scheme increased by 0.72%

0.14%

and 5.71%

respectively; it decreased by 0.98% in the RGD scheme. Under the two networks

the double-source detection network scheme achieved the best detection result in each scheme. Compared with the RGB scheme

the improvement in average accuracy of double-source detection network scheme showed a rising trend with the increase in forest density. Comparative analysis of the experimental results shows that proper combination and utilization of the color

texture

and elevation information of the ground objects is beneficial to improve the performance in the urban individual tree crown detection task based on deep learning.

关键词

遥感单木树冠检测深度学习城市高程彩色图像无人机

Keywords

remote sensingindividual tree crown detectiondeep learningurbanelevationcolor imageUAV

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