| 近程毫米波被动扫描成像特性研究 |
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| 引用本文： | 王本庆,李兴国.近程毫米波被动扫描成像特性研究[J].南京理工大学学报(自然科学版),2009,33(2). |
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| 作者姓名： | 王本庆 李兴国 |
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| 作者单位： | 南京理工大学,电子工程与光电技术学院,江苏,南京,210094 |
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| 摘 要： | 针对近程毫米波辐射计扫描成像分辨率低、图像模糊的问题,采用天线近程辐射特性融合极大似然估计方法对图像进行高分辨率恢复.首先分析了系统天线的近程辐射特性,它是影响成像质量的最主要因素.分析表明近程条件下天线辐射特性大大改变,增益减小,尺度变大,在此基础上估计了扫描体制下图像的点扩散函数,最后用极大似然估计方法对金属环的被动毫米波图像进行了高分辨率恢复.结果表明经过恢复的图像提高了分辨率和目标识别率.
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| 关 键 词： | 毫米波辐射计 近程被动成像 点扩散函数 图像恢复 |
Characteristics of Near Range Millimeter Wave Radiometer Passive Scanning Image |
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| WANG Ben-qing,LI Xing-guo.Characteristics of Near Range Millimeter Wave Radiometer Passive Scanning Image[J].Journal of Nanjing University of Science and Technology(Nature Science),2009,33(2). |
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| Authors: | WANG Ben-qing LI Xing-guo |
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| Institution: | School of Electronic Engineering and Optoelectronic Technology;NUST;Nanjing 210094;China |
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| Abstract: | In view of the low resolution and the blurred characteristic of the near range millimeter wave radiometer scanning image,a maximum likelihood approach is proposed to restore high resolution image using near range antena radiation characteristic.The antenna radiation characteristic under near range is analyzed,which is the primary factor to affect the image quality.The analysis result shows that the near range antenna radiation characteristic is significantly changed,the gain decreases and that the scale is ... |
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| Keywords: | millimeter wave radiometers near rang passive imaging point spread function image restoration |
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