We use Lena as the standard train image, make the compression rate as parameter, apply the genetic method and find the optimization of biorthogonal wavelet filter banks that maximizes the PSNR.

• 然后以压缩比为参数 ,通过得到最大的峰值信噪比来寻找最优的双正交小波基 ,从而将复杂的多输入 ,两输出问题简化为多输入单输出的最优化问题 ;