引用本文:顾昊,徐亮,郁建桥,陈启美.一种基于游弋图像的水域监视鸟瞰图成像系统[J].环境监控与预警,2011,3(05):31-45
.An Imaging System based on Mobile-Camera for Top View of Water Surface Monitoring[J].Environmental Monitoring and Forewarning,2011,3(05):31-45
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一种基于游弋图像的水域监视鸟瞰图成像系统
顾昊1, 徐亮,郁建桥2, 陈启美1
1.南京大学电子科学与工程学院,江苏 南京 210093;2.江苏省环境监测中心,江苏 南京 210036
摘要:
针对各类水域污染日趋严重而传统水质监测方式离散、范围受限等不足,构建了基于游弋图像的水域鸟瞰图成像系统,实现大范围实时、连续监控。使用偏振设备消除水面反光,得到清晰的水面图像。设计了摄像机内外参标定的方法,在线获得状态参数;提出了自适应空洞填补的策略,消除了由透视图映射至鸟瞰图时产生的图像空洞;结合GPS信息和图像特征配准技术,实现由船载摄像机视频序列拼合成鸟瞰全景图象。该方法具有分辨率高、实时性强、监测范围广和使用成本低等优势。
关键词:  偏振  监测  标定  图像映射  图像融合  图像拼接
DOI:
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基金项目:国家水体污染控制与治理科技重大专项项目(2009ZX07528-005-02),江苏省环保厅科研项目(2009017),江苏省环境监测中心项目(0917)
An Imaging System based on Mobile-Camera for Top View of Water Surface Monitoring
Abstract:
As various types of water pollution is worsening, the traditional way of monitoring is insufficient because of dispersing and of limited range, a mobile-camera based imaging system for top view of water surface is built to achieve wide-ranging and continuous monitoring in real time. Reflective light of the water surface is eliminated by polarization devices, results in clear water images; new methods for camera calibration is designed so that parameters can be calculated on-line; strategy is proposed to fill the adaptive empty and eliminated the image empty after warpping to another view; with GPS information and registration technology, we get atop view image from the camera video sequences. This system can provide high resolution image with wide range and real time monitoring, besides, the cost is quite low.
Key words:  polarization  monitoring  calibration  image warping  image fusion  image mosaic