| 利用无人机遥感提取育种小区玉米倒伏信息 |
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| 引用本文： | 毛智慧,邓磊,赵晓明,胡艺凡. 利用无人机遥感提取育种小区玉米倒伏信息[J]. 中国农学通报, 2019, 35(3): 62-68. DOI: 10.11924/j.issn.1000-6850.casb17100076 |
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| 作者姓名： | 毛智慧 邓磊 赵晓明 胡艺凡 |
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| 作者单位： | 1.首都师范大学资源环境与旅游学院;2.中国农业大学生物学院;3.中国农业大学农学院 |
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| 摘 要： | 研究了无人机遥感技术在小区尺度上进行玉米倒伏信息提取的可行性。笔者使用小型无人机通过无地面控制点的倾斜摄影方式,获得研究区的数字表面模型(DSM),结合图像的红、绿、蓝色彩特征,采用图像分类的方法提取玉米倒伏信息,并在小区尺度上与田间调查结果进行对比分析。结果表明,数字表面模型所代表的玉米冠层高度差异信息与图像色彩特征具有良好的互补性,二者结合能够极大地提高玉米倒伏信息的提取精度。与田间调查数据相比,倒伏株数的误差只有4.44%,受倒伏影响的小区数量误差为9.26%,且85%以上小区内的株数误差小于5棵。玉米冠层高度结合色彩特征信息可精准地提取玉米倒伏信息;倾斜摄影测量方式可有效降低地面控制点缺失带来的模型内畸变,提高工作效率。该方法为小区尺度的玉米倒伏调查提供了一种简单、快速、有效的手段。
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| 收稿时间： | 2017-10-24 |
Extraction of Maize Lodging in Breeding Plot Based on UAV Remote Sensing |
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| Abstract: | To study the feasibility of extraction of maize lodging in plot area by UAV remote sensing. The authors obtained the digital surface model (DSM) of the study area by using the tilt photography method without the ground control points (GCPs) of a small unmanned aerial vehicle (UAV); the DSM was utilized as an additional feature together with the color features, i.e., red, green and blue color of the DOM, and then, the supervised classification method was performed on it to extract the maize lodging information; at last, we compared the results with the field survey results on the plot scale. The results showed that: the maize canopy height difference information represented by the digital surface model had a good complementarity with the image color characteristics, and the combination of the two could greatly improve the extraction accuracy of maize lodging information. Compared with the field survey data, the error of the number of lodging trees was only 4.44%, the error of plots number affected by lodging was 9.26%, and the error number of plots more than 85% was less than 5. Maize canopy height combined with color characteristic information can accurately extract lodging information of maize; the method of tilt photogrammetry can effectively reduce the intra-model distortion caused by the lack of ground control points and improve the working efficiency. This method provides a simple, rapid and effective means for the investigation of maize lodging in plot scale. |
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