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Alternative TitleStudy on Algorithm for Enhancing Spatial Resolution ofSpaceborne M icrowave Radiometer
尹红刚; 张德海; 北京8701信箱
Source Publication海洋科学进展
Keyword星载微波辐射计 空间分辨率 增强 图像 反演
Abstract由于天线尺寸和重量受到限制,星载微波辐射计的空间分辨率通常都比较低.同时在测量地理参数时往往要用到辐射计的多个频率通道测量值,这就需要把不同通道的空间分辨率统一成某个较高空间分辨率.因此,出于应用的目的,利用微波辐射计空间分辨率增强算法来得到较高分辨率的图像很有必要.简单介绍了增强星载微波辐射计图像空间分辨率的几种算法,详细叙述了Baekus-Gilbert反演算法的原理.设计了带有一些地物特征的人工合成图像,并使用BG反演算法对一模拟辐射计的生成图像进行了增强处理.从处理前后的图像对比可知,无论辐射计测量是否含有噪声,BG反演算法都很好地提高了辐射计生成图像的空间分辨率.在考虑噪声时,通过分析增强处理后图像与人工合成图像之间的相关性,仔细挑选协调参数,对分辨率和噪声进行了较好的折中处理.; Generally speaking,the spatial resolutions of spaceborne microwave rodiometer are lower due to the limitation of its antenna size and weight,and the measurements from several radiometer frequency channels are usually used for measuring geographic parameters,SO the spatial resolutions of different chan-nels shall be unified to be a higher spatial resolution.For the sake of application,it is necessary to use the algorithm for enhancing spatial resolution of microwave radiometer to get the image with a higher resolu tion.In this paper,some algroithms for enhancing the spatial resolution are briefly introduced,and the Backus-Gilbert(BG)inversion algorithm is described in detail.An artificially synthetic image with some ground obj ect features is designed,and the BG inversion algorithm is used to enhance the spatial resolu-tions of simulated radiometer images.It is shown from the comparison between the unenhanced and en-hanced images that whether or not the radiometer measurements contain noise,the BG inversion algorithm has well improved the spatial resolutions of all simulated radiometer images.For the case with noise,an appropriate compromise between resolution and noise is made by analyzing the correlation between the en-hanced images and the artificially synthetic image and carefully selecting the coordination parameter.
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
尹红刚,张德海,北京8701信箱. 星载微波辐射计空间分辨率增强算法研究[J]. 海洋科学进展,2004,22(10):192-197.
APA 尹红刚,张德海,&北京8701信箱.(2004).星载微波辐射计空间分辨率增强算法研究.海洋科学进展,22(10),192-197.
MLA 尹红刚,et al."星载微波辐射计空间分辨率增强算法研究".海洋科学进展 22.10(2004):192-197.
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