摘要
针对大幅面遥感影像在分块边界特征不连续和分割效率不高等问题,本文提出了结合Spark平台及最优紧密度评估的简单线性迭代聚类超像素分割算法(SLIC)。首先,使用结合最优紧密度的SLIC超像素分割方法完成图像分块,解决分块边界精度低的问题;然后,利用Spark对分块数据并行SLIC分割算法,提高运算效率;最后,将WorldView-2卫星影像和GF-2号影像作为试验数据,利用比值植被指数结合最大类间方差法改进SLIC算法以提高超像素分割精度。结果表明,改进SLIC方法在运算效率上比原方法提高了约9倍,边缘拟合精度提高了1.5%,欠分割误差提高了8.2%,边缘召回率提高了0.2%。
Aiming at the large format remote sensing image in the chunk boundary feature discontinuity and segmentation efficiency is not high.In this paper,we propose a simple linear iterative clustering superpixel segmentation algorithm(SLIC) that combines the Spark platform and optimal compactness evaluation.Firstly,the SLIC superpixel segmentation method with optimal tightness is used to complete the image chunking,which solves the problem of low accuracy of the chunk boundary;then,the SLIC segmentation algorithm is used in parallel to the chunked data by using Spark to improve the computational efficiency;finally,the SLIC algorithm is improved by using the ratio of vegetation index combined with the method of maximum interclass variation to improve the accuracy of the superpixel segmentation.WorldView-2 Satellite Imagery and GF-2 images are used as experimental data.The experimental results show that the improved SLIC method improves about 9 times of the original method in terms of computing efficiency,1.5% of the edge fitting precision,8.2% of the under-segmentation error,and 0.2% of the edge recall.
作者
谢志伟
宋光明
张丰源
陈旻
彭博
XIE Zhiwei;SONG Guangming;ZHANG Fengyuan;CHEN Min;PENG Bo(Key Laboratory of Virtual Geographic Environment,Ministry of Education,Nanjing Normal University,Nanjing 210042,China;College of Transportation and Surveying Engineering,Shenyang Jianzhu University,Shenyang 110168,China;College of the Environment,Nanjing Normal University,Nanjing 210042,China;School of Geographic Sciences,Nanjing Normal University,Nanjing 210042,China;School of Surveying and Mapping Engineering,Liaoning Ecological Engineering Vocational College,Shenyang 110122,China)
出处
《测绘通报》
CSCD
北大核心
2024年第10期84-90,共7页
Bulletin of Surveying and Mapping
基金
国家自然科学基金(42101353)
教育部人文社会科学研究基金(21YJC790129)
辽宁省教育厅基本科研项目(LJKMZ20220946)
辽宁省教育厅基本科研项目(LJKMZ20222128)。
关键词
大幅面遥感影像
Spark平台
改进SLIC算法
并行计算
最优参数评估
large format remote sensing image
Spark platform
improved SLIC algorithm
parallel computing
optimal parameter evaluation
