基于色相角算法的珠江口赤潮遥感识别
Remote sensing identification of red tide in Pearl River Estuary based on hue angle algorithm
许源兴 1孙琰 1肖鹤 1艾彬 2刘大召3
作者信息
- 1. 广东海洋大学电子与信息工程学院,广东 湛江 524088
- 2. 中山大学海洋科学学院,广东 珠海 519082;南方海洋科学与工程广东省实验室(珠海),广东 珠海 519082
- 3. 广东海洋大学电子与信息工程学院,广东 湛江 524088;广东省海洋遥感与信息技术工程技术中心,广东 湛江 524088
- 折叠
摘要
为实现珠江口高分辨率赤潮遥感识别,科学支撑赤潮灾害防灾减灾工作,利用海洋一号C/D卫星搭载的海岸带成像仪高空间分辨率数据,在分析珠江口近岸浑浊水体、干净水体和赤潮水体遥感影像光谱特征基础上,通过计算水体色相角并结合目视解译识别珠江口赤潮.利用该方法成功识别2020年10月26日—11月6日在珠江口海域发生的双胞旋沟藻赤潮.利用色相角能够很好地识别出珠江口海域的赤潮;赤潮水体的色相角在58°～61°变化;该方法对形成初期的小范围赤潮、低密度赤潮和条带状赤潮具有很好的识别效果.
Abstract
To realize the red tide identification of Pearl River Estuary with high resolution remote sensing,and to scientifically support red tide disaster prevention and mitigation work.This paper used the high spatial resolution data of the coastal zone imager carried by Haiyang-1C/D satellite,together with the analysis of the spectral characteristics of remote sensing images of turbid water,clean water and red tide in the Pearl River Estuary,to identify red tide by calculating the water hue angle and combining with visual interpretation.This method was used to successfully identify the Cochlodinium geminatum red tide in the Pearl River Estuary from October 26 to November 6,2020.The hue angle can be used to identify the red tide in the Pearl River Estuary.The hue angle of red tide water varies from 58° to 61°,which has a good identification effect on small area red tide during their initiation,low density red tide and red tide in strip distributed areas.
关键词
珠江口/赤潮/HY-1C/D/色相角Key words
Pearl River Estuary/red tide/HY-1C/D/hue angle引用本文复制引用
基金项目
国家自然科学基金(42206187)
国家自然科学基金(42071261)
南方海洋科学与工程广东省实验室(珠海)创新团队建设项目(311020003/311021004)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据