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Characteristics of Near Range Millimeter Wave Radiometer Passive Scanning Image


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Characteristics of Near Range Millimeter Wave Radiometer Passive Scanning Image
WANG Ben-qingLI Xing-guo
School of Electronic Engineering and Optoelectronic Technology,NUST,Nanjing 210094,China
millimeter wave radiometers near rang passive imaging point spread function image restoration
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 larger.The point spread function of the scanning system is estimated.The passive millimeter wave image of a metal ring is restored using maximum likelihood method.The result shows that it improves the resolution and recognition rate.


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Last Update: 2012-11-19