基于航空高光谱数据的近岸水体信息提取  

Extraction of Coastal Water Information Based on Airborne Hyperspectral Data

作　　者：付东洋[1] 蒋城飞 王永星[2,3] 李强 廖珊[1] 刘大召[1] 

机构地区：[1]广东海洋大学海洋遥感与信息技术实验室,广东湛江524088 [2]中国海监南海航空支队,广东广州510300 [3]南京大学中国南海研究协同创新中心,江苏南京210046

出　　处：《海洋技术学报》2017年第2期71-76,共6页Journal of Ocean Technology

基　　金：国家海洋公益性科研专项资助项目(201305019);广东省自然科学基金资助项目(2014A030313603);广东省科技计划项目资助(2013B030200002;2016A020222016);广东海洋大学创新强校项目资助(GDOU2014050226);广东省攀登计划项目资助(pdjh2015b0249)

摘　　要：近岸水体与人类生产、生活密切相关,航空高光谱遥感以其高分辨率、灵活等优点在环境监测中颇具潜力,尤其是在近岸水色、海岸带环境的实时监测中更具优势。基于与中国海监南海航空支队合作开展的航空高光谱遥感飞行实验资料,以湛江东海岛陆海区域为例,开展该海域水体遥感信息提取及分类研究。以不同地物遥感反射率信息为特征,通过光谱信息直方图进行了该海域水体信息提取方法探索。研究结果表明,湛江港及近海水体与陆地在近红外区域有较大区分度,直方图统计获得的最佳分离阈值可以很好地提取水体信息,但在水陆交界区域提取精度较低。在近红909.7 nm处,遥感反射率分割阈值为10.27%,水体提取精度为84%,kappa系数为0.686 2。Coastal waters are closely related to human production and livelihood. Airborne hyperspectral remote sensing has great potential for environmental monitoring with its high resolution and flexibility,especially in realtime monitoring of inshore ocean color and coastal environment. Based on the airborne hyperspectral remote sensing flight experiment data obtained jointly with the South China Sea Airborne Detachment of China Marine Surveillance,this paper carries out the research on remote sensing information extraction and classification,with the land and marine areas surrounding the Donghai Island in Zhanjiang,Guangdong Province as an example. The study on the methods of extracting coastal water information is conducted through the spectrum information histogram by collecting the information on remote sensing reflectance characteristics of different ground features.Results show that there is a great distinction in the waters of offshore and coastal areas near the infrared section of the spectrum,and the water information can be easily collected via the histogram statistics according to the best separation threshold values. However,the accuracy of water body extraction of land-water conjunction areas is low. The remote sensing reflectance segmentation threshold near the red 909.7 nm is 10.27%,with the water extraction accuracy reaching 84% and kappa coefficient of 0.6862.

关 键 词：航空高光谱 遥感反射率 水体提取 阈值分割 东海岛 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]