| 渤海海冰Modis影像中"伪海冰像元"消除方法的探讨 |
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| 引用本文： | 谢锋,顾卫,李宁,崔维佳,刘珍,叶军.渤海海冰Modis影像中"伪海冰像元"消除方法的探讨[J].海洋环境科学,2007,26(5):422-426. |
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| 作者姓名： | 谢锋 顾卫 李宁 崔维佳 刘珍 叶军 |
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| 作者单位： | 1. 北京师范大学,环境演变与自然灾害教育部重点实验室,北京,100875;北京师范大学,资源学院,北京,100875
2. 四川自贡洪康实业有限公司,四川,自贡,643000 |
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| 基金项目： | 国家自然科学基金
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国家高技术研究发展计划(863计划) |
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| 摘 要： | "伪海冰像元"对渤海海冰范围分布信息的提取产生影响,消除伪海冰像元需要得到一些传感器、大气状况等参数,但往往很难全部得到满足.本文研究了在不知道传感器、大气状况等参数的条件下,通过对数字影像进行实验分析,提取传感器、大气状况引起的脉冲响应函数,并利用该函数结合频域逆滤波和维纳滤波器求解消除非理想脉冲响应的反卷积函数,在空域利用反卷积函数对图像进行逆处理的"伪海冰像元"消除方法.试验结果表明,该方法能够达到降低"伪海冰像元"与其邻域海水像元之间分离度的目的,从而较好的在渤海海区Modis影像中实现分离出"伪海冰像元"的效果.
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| 关 键 词： | 渤海海冰 伪海冰像元 系统响应函数 逆处理 渤海海冰 Modis 数字影像 像元 消除方法 the Bohai Sea image method 效果 分离度 海水 邻域 结果 试验 处理 图像 空域利用 积函数 脉冲响应函数 求解 |
| 文章编号： | 1007-6336（2007）05-0422-05 |
| 收稿时间： | 2005-12-15 |
| 修稿时间： | 2006-04-19 |
Research on the method to eliminate illusory ice-pixel from Modis image in the Bohai Sea |
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| XIE Feng,GU Wei,LI Ning,CUI Wei-jia,LIU Zhen,YE Jun.Research on the method to eliminate illusory ice-pixel from Modis image in the Bohai Sea[J].Marine Environmental Science,2007,26(5):422-426. |
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| Authors: | XIE Feng GU Wei LI Ning CUI Wei-jia LIU Zhen YE Jun |
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| Institution: | 1. Key Laboratory of Environmental Change and Natural Disasters, Ministry of Education of China, Beijing Normal University, Beijing 100875, China; 2. College of Resources Sciences and Technology, Beijing Normal University, Beijing 100875, China; 3. Sichuan Zigong Kanghong Ltd. , Zigong 643000, China |
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| Abstract: | Based on the remote sensing data,information of the distribution of sea ice in the Bohai Sea was invariably vitiated by the illusory ice-pixel.Under the analysis of acquired image,the discussion of the derivative of the system response function by using four kinds of ice-water edge structure was made.Without the information of the sensor and atmosphere,the deconvolution filters were derived specifically for each image from its function in the frequency domain and transform into space domain by the invert fourier.Finally,the difference of values between the sea water pixel with illusory ice-pixel in neighborhood was reduced through this converse progress method in the Modis image,and most of illusory ice-pixel can be picked off from the real sea ice pixels. |
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| Keywords: | sea ice illusory ice-pixel system response function converse progress |
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