基于Bayes假设检验的SAR图像分辨率计算方法

A New Mehtod for Calculating SAR Image Resolution Based on Bayesian Hypothesis Test

分辨率是衡量SAR成像质量的重要评价指标。目前所采用的3dB主瓣宽度方法来源于光学成像中的瑞利准则,受人类视觉感知能力限制,且没有考虑噪声影响。根据SAR图像表达式与观测信号乘法模型,在存在目标位置先验信息情况下,基于Bayes假设检验理论建立点目标分辨判别准则,得到统计意义上的分辨率计算方法,得到的结论与现有的关于分辨率计算的定性理解相一致,克服了瑞利准则的缺陷。

SAR Image Resolution is a very important index for evaluating the imaging quality of SAR system and is usually gained by calculating 3dB mainlobe width of the point target impulse response.This method derives from the Rayleigh criteria which is limited by the ability of the human vision and doesn't deal with the effect of the noise.In terms of SAR image signal expression and multiplicative model of the observed signal,this paper established the resolution criteria based on the Bayesian hypothesis test theor...