面向对象的无人机正射影像土地利用详查研究

Research on land-use detailed investigation of object-oriented unmanned aerial vehicles orthophotos

本文选取试验区进行无人机航空摄影,使用PixelGrid系统处理影像数据,获取试验区正射影像,利用面向对象的影像分类方法提取土地利用信息并进行精度评价,最后对面向对象的无人机正射影像土地利用详查技术流程进行总结。结果表明:无人机航空摄影测量技术在土地利用信息快速获取方面具有广阔的应用空间;利用面向对象方法进行影像分类效果较好,总体精度达到89%,Kappa系数为0.82。研究结果为利用无人机航空摄影测量技术进行土地利用详查提供了一定的指导意义。

In this paper,aerial photography of unmanned aerial vehicles(UAV) was carried on in the test area,and the orthophoto map was obtained by using the PixelGrid system.The land use information was extracted with object-oriented image classification method and the accuracy was evaluated.The technical process of object-oriented land use detailed investigation for UAV was summarized.The results show that:the UAV aerial photogrammetry technology has a wide application prospect in the fast access to land use information.The object-oriented method for image classification is very effective,the overall accuracy is 89% and the Kappa coefficient is 0.82.The results of this study can provide some guidance for the land use detailed investigation using UAV aerial photogrammetry technology.