资源三号测绘卫星自动云检测

doi:10.11947/j.AGCS.2015.20130384

测绘学报 ›› 2015, Vol. 44 ›› Issue (3): 292-300.doi: 10.11947/j.AGCS.2015.20130384

资源三号测绘卫星自动云检测

陈振炜¹, 张过^2,3, 宁津生¹, 唐新明³

1. 武汉大学测绘学院, 湖北武汉 430079;
2. 武汉大学测绘遥感信息工程国家重点实验室, 湖北武汉 430079;
3. 国家测绘地理信息局卫星测绘应用中心, 北京 100830

收稿日期:2013-12-19 修回日期:2014-10-15 出版日期:2015-03-20 发布日期:2015-04-01
通讯作者: 张过 E-mail:guozhang@whu.edu.cn E-mail:guozhang@whu.edu.cn
作者简介:陈振炜(1988—),男,博士生,研究方向为多时序InSAR在地表形变监测中的应用. E-mail:287322095@qq.com
基金资助:
国家自然科学基金(41201361);测绘地理信息公益性行业科研专项(20141200;201512022)

An Automatic Cloud Detection Method for ZY-3 Satellite

CHEN Zhenwei¹, ZHANG Guo^2,3, NING Jinsheng¹, TANG Xinming³

1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
2. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China;
3. Satellite Surveying and Mapping Application Center, National Administration of Surveying, Mapping and Geoinformation, Beijing 100830, China

Received:2013-12-19 Revised:2014-10-15 Online:2015-03-20 Published:2015-04-01
Supported by:
The National Natural Science Foundation of China(No.41201361);Public Science Research Programme of Surveying,Mapping and Geoinformation(Nos.201412007;201512022)

摘要/Abstract

摘要：

光学卫星遥感影像自动云检测是卫星产品生产系统的一个重要环节.利用资源三号卫星编目生成的浏览图,采用树状判别结构进行云检测,对浏览图进行分块,提取子块图像的特征进行云地分类.由于云类和地物类过于繁杂,且浏览图的分辨率较低,传统通过图像特征对云地进行分类的算法有很大的局限性,针对这一问题,本文提出了在分类之前对原始的子块图像进行增强处理,扩大云和地物的纹理差异,然后以二阶矩、一阶差分等作为云地分类的图像特征,并在多尺度空间内进行特征延拓,经过综合分析估计云在影像中的比例.该云检测算法应用于资源三号卫星应用系统工程,实际测试结果表明,该算法能够较好地提升云量检测的准确率.

关键词: 云量检测, 直方图均衡化, 特征提取, 多尺度

Abstract:

Automatic cloud detection for optical satellite remote sensing images is a significant step in the production system of satellite products. For the browse images cataloged by ZY-3 satellite, the tree discriminate structure is adopted to carry out cloud detection. The image was divided into sub-images and their features were extracted to perform classification between clouds and grounds. However, due to the high complexity of clouds and surfaces and the low resolution of browse images, the traditional classification algorithms based on image features are of great limitations. In view of the problem, a prior enhancement processing to original sub-images before classification was put forward in this paper to widen the texture difference between clouds and surfaces. Afterwards, with the secondary moment and first difference of the images, the feature vectors were extended in multi-scale space, and then the cloud proportion in the image was estimated through comprehensive analysis. The presented cloud detection algorithm has already been applied to the ZY-3 application system project, and the practical experiment results indicate that this algorithm is capable of promoting the accuracy of cloud detection significantly.

Key words: cloud detection, histogram equalization, feature extraction, multi-scale

中图分类号:

P237

陈振炜, 张过, 宁津生, 唐新明. 资源三号测绘卫星自动云检测[J]. 测绘学报, 2015, 44(3): 292-300.

CHEN Zhenwei, ZHANG Guo, NING Jinsheng, TANG Xinming. An Automatic Cloud Detection Method for ZY-3 Satellite[J]. Acta Geodaetica et Cartographica Sinica, 2015, 44(3): 292-300.

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资源三号测绘卫星自动云检测

An Automatic Cloud Detection Method for ZY-3 Satellite

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