包括压缩比、运行时间和计算复原图像的峰值信噪比,ML法能够很好的估计信号的信噪比,窗函数法设计一个数字带通FIR滤波器。- Including compression ratio, image restoration computing uptime and peak signal to noise ratio, ML estimation method can be a good signal to noise ratio, A window function design FIR digit