由于大气中气溶胶和湍流的存在,致使图像质量退化,依据退化的物理过程,建立了基于大气调制传递函 数(modulation transfer function, )的退化模型,从而进行图像复原。首先,利用图像拍摄时刻湍流和 气溶胶的相关大气参数,估算出粗略的大气;其次,采用一种指数调节曲线的方法,指数因子通过迭 代递归的方法确定,并以复原图像平均梯度最大为截止条件,从而得到更加精准的曲线；最后,给出 了实验结果,并对其进行定量评价,结果表明复原后的图像在视觉效果和定量指标上都有很大提高。

Due to the effect of turbulence and aerosol in atmosphere, image quality is degraded. According to physical process of degrading, the model of image degrading was built based on atmospheric modulation transfer function () and was used to restore blurred image. Firstly, Approximate atmospheric was estimated using meteorological data when imaging, including turbulence and aerosol. Then an exponent adjusting method of was used to get more accuracy curve. The exponent adjusting factor was determined by iterative method, and the iteration was stopped when average gradient of restored image was the largest. At last, experimental result was given and assessed quantitatively, which showed that restored image was improved obviously in visual effect and quantitative specification.