对图像进行2维小波编码 来实现压缩。将小波分析引入图像压缩的范畴也是一个重要的手段，并且有着它自己的特点。它的特点在于压缩比高、压缩速度快，压缩后能保持信号与图像的特征基本不变，且在传递过程中可以抗干扰等等。（有两种方法）-of two-dimensional images wavelet compression coding to achieve. Wavelet Image Compression analysis of the introduction of the context is also an important means, it has its own characteristics. It features is the compression ratio, faster compression, the compressed signal can be maintained with the image of the same basic features, and the transfer process can be interference, etc.. (There are two methods)